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			{{Short description|Human-caused changes to climate on Earth}}
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			{{About|the present-day human-induced rise in global temperatures|natural historical climate trends|Climate variability and change}}
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			{{Redirect|Global warming||Climate change (disambiguation)|and|Global warming (disambiguation)}}
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			] over the past 50 years.<ref>{{Cite web |title=GISS Surface Temperature Analysis (v4) |url=https://data.giss.nasa.gov/gistemp/maps/index_v4.html |access-date=12 January 2024 |website=NASA}}</ref> The ] has warmed the most, and temperatures on land have generally increased more than ]s.]]
	<!-- Please leave the first paragraph as a simple declarative sentence. Details on terminology have been added at the end of the intro. The rest of the intro should be a ] summary. -->
			]. Natural forces cause some variability, but the 20-year average shows the progressive influence of human activity.<ref>{{harvnb|IPCC AR6 WG1 Summary for Policymakers|2021|loc=SPM-7}}</ref>]]
	'''Global warming''' is the increase in the ] of the Earth's near-surface air and ]s in recent decades and its projected continuation.
			<!--Please do not change the content in the lead section without first proposing the change on the talk page, and please limit overall length to under 500 words.-->
			Present-day '''climate change''' includes both '''global warming'''—the ongoing increase in ]—and its wider effects on ]. ] also includes previous long-term changes to Earth's climate. The current rise in global temperatures is ], especially ] burning since the ].<ref>{{harvnb|Forster|Smith|Walsh|Lamb|2024|p=2626}}: "The indicators show that, for the 2014–2023 decade average, observed warming was 1.19 °C, of which 1.19 °C was human-induced."</ref><ref name=Lynas_2021>{{cite journal |last1=Lynas |first1=Mark |last2=Houlton |first2=Benjamin Z. |last3=Perry |first3=Simon |title=Greater than 99% consensus on human caused climate change in the peer-reviewed scientific literature |journal=] |date=19 October 2021 |volume=16 |issue=11 |page=114005 |doi=10.1088/1748-9326/ac2966 |bibcode=2021ERL....16k4005L |s2cid=239032360 |doi-access=free |issn = 1748-9326}}</ref> Fossil fuel use, ], and some ] and ] practices release ]es.<ref name="Our World in Data-2020">{{harvnb|Our World in Data, 18 September|2020}}</ref> These gases ] that the Earth ] after it warms from ], warming the lower atmosphere. ], the primary greenhouse gas driving global warming, ] and is at levels not seen for millions of years.<ref>{{harvnb|IPCC AR6 WG1 Technical Summary|2021|p=67}}: "Concentrations of {{CO2}}, methane ({{CH4}}), and nitrous oxide ({{N2O}}) have increased to levels unprecedented in at least 800,000 years, and there is high confidence that current {{CO2}} concentrations have not been experienced for at least 2 million years."</ref>
			Climate change has an increasingly large ]. ], while ]s and ]s are becoming more common.<ref>
	Global average air temperature near the Earth's surface rose 0.74 ] 0.18&nbsp;°] (1.3 ± 0.32&nbsp;°]) during the past century. The ] (IPCC) concludes, "most of the observed increase in globally averaged temperatures since the mid-20th century is very likely ] the observed increase in ] greenhouse gas concentrations,"<ref name=grida7>{{cite web | url=http://www.ipcc.ch/SPM2feb07.pdf | format=] | title=Summary for Policymakers | work=Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change | accessdate=2007-02-02 | date=] |publisher=]}}</ref> which leads to warming of the surface and lower atmosphere by increasing the ]. Natural phenomena such as ] combined with ]es have probably had a small warming effect from pre-industrial times to 1950, but a cooling effect since 1950. The basic conclusions have been endorsed by at least 30 ], including all of the national academies of science of the ]. The ] is the only scientific society that rejects these conclusions,<ref>{{cite journal|author= American Quaternary Association| date = ] | url= http://www.agu.org/fora/eos/pdfs/2006EO360008.pdf |title = Petroleum Geologists‘ Award to Novelist Crichton Is Inappropriate | journal = ] | volume = 87 | number = 3| pages = 364 | format = ] |quote = stands alone among scientific societies in its denial of human-induced effects on global warming.}}</ref><ref>{{cite web |url= http://dpa.aapg.org/gac/papers/climate_change.cfm |title= Climate Change Policy |accessdate=2007-03-30 |format= ] | publisher = ]}}</ref> and a few ] also disagree with parts of them.<ref>{{cite journal|author= American Quaternary Association| date = ] | url= http://www.agu.org/fora/eos/pdfs/2006EO360008.pdf |title = Petroleum Geologists‘ Award to Novelist Crichton Is Inappropriate | journal = ] | volume = 87 | number = 3 | pages = 364 | format = ] | quote = Few credible scientists now doubt that humans have influenced the documented rise in global temperatures since the Industrial Revolution.}}</ref>
			* {{harvnb|IPCC SRCCL|2019|p=7}}: "Since the pre-industrial period, the land surface air temperature has risen nearly twice as much as the global average temperature (high confidence). Climate change... contributed to desertification and land degradation in many regions (high confidence)."
			* {{harvnb|IPCC AR6 WG2 SPM|2022|p=9}}: "Observed increases in areas burned by wildfires have been attributed to human-induced climate change in some regions (medium to high confidence)"</ref> ] has contributed to thawing ], ] and ].<ref>{{harvnb|IPCC SROCC|2019|p=16}}: "Over the last decades, global warming has led to widespread shrinking of the cryosphere, with mass loss from ice sheets and glaciers (very high confidence), reductions in snow cover (high confidence) and Arctic sea ice extent and thickness (very high confidence), and increased permafrost temperature (very high confidence)."</ref> Higher temperatures are also causing ], droughts, and other ].<ref>{{Harvnb|IPCC AR6 WG1 Ch11|2021|p=1517}}</ref> Rapid environmental change in ], ]s, and ] is forcing many species to relocate or ].<ref>{{cite web|author=EPA|date=19 January 2017|title=Climate Impacts on Ecosystems|url=https://19january2017snapshot.epa.gov/climate-impacts/climate-impacts-ecosystems_.html#Extinction|url-status=live|archive-url=https://web.archive.org/web/20180127185656/https://19january2017snapshot.epa.gov/climate-impacts/climate-impacts-ecosystems_.html#Extinction|archive-date=27 January 2018|access-date=5 February 2019|quote=Mountain and arctic ecosystems and species are particularly sensitive to climate change... As ocean temperatures warm and the acidity of the ocean increases, bleaching and coral die-offs are likely to become more frequent.}}</ref> Even if efforts to minimize future warming are successful, some effects will continue for centuries. These include ], ] and ].<ref>{{harvnb|IPCC SR15 Ch1|2018|p=64}}: "Sustained net zero anthropogenic emissions of {{CO2}} and declining net anthropogenic non-{{CO2}} radiative forcing over a multi-decade period would halt anthropogenic global warming over that period, although it would not halt sea level rise or many other aspects of climate system adjustment."</ref>
			Climate change ] with increased ], extreme heat, increased ] and ] scarcity, more disease, and ]. ] and conflict can also be a result.<ref>
	Climate models referenced by the IPCC project that global surface temperatures are likely to increase by {{nowrap|1.1 to 6.4 °C}} {{nowrap|(2.0 to 11.5 °F)}} between 1990 and 2100.<ref name=grida7/> The range of values reflects the use of differing ] of future ] emissions and results of models with differences in ]. Although most studies focus on the period up to 2100, warming and sea level rise are expected to continue for more than a millennium even if greenhouse gas levels are stabilized.<ref name=grida7/> This reflects the large heat capacity of the oceans.
			* {{harvnb|Cattaneo|Beine|Fröhlich|Kniveton|2019}}
			* {{harvnb|IPCC AR6 WG2 SPM|2022|p=15}}
			* {{harvnb|IPCC AR6 WG2 Technical Summary|2022|p=53}}</ref> The ] calls climate change one of the biggest threats to ] in the 21st century.<ref name=WHO_Nov_2023>{{harvnb|WHO, Nov|2023}}</ref> Societies and ecosystems will experience more severe risks without ].<ref>{{harvnb|IPCC AR6 WG2 SPM|2022|p=19}}</ref> ] through efforts like ] measures or ] partially reduces climate change risks, although some limits to ] have already been reached.<ref>
			* {{harvnb|IPCC AR6 WG2 SPM|2022|pp=21–26}}
			* {{harvnb|IPCC AR6 WG2 Ch16|2022|p=2504}}
			* {{harvnb|IPCC AR6 SYR SPM|2023|pp=8–9}}: "Effectiveness<sup>15</sup> of adaptation in reducing climate risks<sup>16</sup> is documented for specific contexts, sectors and regions (high confidence) ... Soft limits to adaptation are currently being experienced by small-scale farmers and households along some low-lying coastal areas (medium confidence) resulting from financial, governance, institutional and policy constraints (high confidence). Some tropical, coastal, polar and mountain ecosystems have reached hard adaptation limits (high confidence). Adaptation does not prevent all losses and damages, even with effective adaptation and before reaching soft and hard limits (high confidence)."</ref> Poorer communities are responsible for ], yet have the least ability to adapt and are most ].<ref>{{cite web |last1=Tietjen |first1=Bethany |title=Loss and damage: Who is responsible when climate change harms the world's poorest countries? |url=https://theconversation.com/loss-and-damage-who-is-responsible-when-climate-change-harms-the-worlds-poorest-countries-192070 |website=] |access-date=30 August 2023 |date=2 November 2022}}</ref><ref>{{cite web |title=Climate Change 2022: Impacts, Adaptation and Vulnerability |url=https://www.ipcc.ch/report/sixth-assessment-report-working-group-ii/ |publisher=] |access-date=30 August 2023 |date=27 February 2022}}</ref>
			<noinclude>{{multiple image
			| perrow = 1 / 2
			| total_width = 310
			| image1 = Bobcat Fire, Los Angeles, San Gabriel Mountains.jpg
			| alt1 = Bobcat Fire in Monrovia, CA, September 10, 2020
			| image2 = Bleached colony of Acropora coral.jpg
			| alt2 = Bleached colony of Acropora coral
			| image4 = California Drought Dry Lakebed 2009.jpg
			| alt4 = A dry lakebed in California, which is experiencing its worst megadrought in 1,200 years.<ref>{{cite web |url=https://www.cbsnews.com/amp/news/water-cutbacks-california-6-million-people-drought/ |title=California is rationing water amid its worst drought in 1,200 years |first=Irina |last=Ivanova |publisher=] |date=June 2, 2022}}</ref>
			| footer = Examples of some ]: ] intensified by heat and drought, ] occurring more often due to ]s, and worsening ]s compromising water supplies.
			}}
			</noinclude>
			Many climate change impacts have been observed in the first decades of the 21st century, with 2023 the warmest on record at +{{convert|1.48|C-change}} since regular tracking began in 1850.<ref>{{cite web |title=2023 confirmed as world's hottest year on record |url=https://www.bbc.com/news/science-environment-67861954 |publisher=] |first1=Mark |last1=Poynting |first2=Erwan |last2=Rivault |access-date=13 January 2024 |date=10 January 2024}}</ref><ref>{{Cite web |date=21 April 2023 |title=Human, economic, environmental toll of climate change on the rise: WMO|url=https://news.un.org/en/story/2023/04/1135852 |access-date=11 April 2024 |publisher=United Nations |language=en}}</ref> Additional warming will increase these impacts and can trigger ], such as melting all of the ].<ref>{{harvnb|IPCC AR6 WG1 Technical Summary|2021|p=71}}</ref> Under the 2015 ], nations collectively agreed to keep warming "well under 2&nbsp;°C". However, with pledges made under the Agreement, global warming would still reach about {{convert|2.8|C-change}} by the end of the century.<ref name="UNEP2024">{{harvnb|United Nations Environment Programme|2024|p=XVIII}}: "The full implementation and continuation of the level of mitigation effort implied by unconditional or conditional NDC scenarios lower these projections to 2.8&nbsp;°C (range: 1.9–3.7) and 2.6&nbsp;°C (range: 1.9–3.6), respectively. All with at least a 66 per cent chance."</ref> Limiting warming to 1.5&nbsp;°C would require halving emissions by 2030 and achieving ] emissions by 2050.<ref>{{harvnb|IPCC SR15 Ch2|2018|pp=95–96}}: "In model pathways with no or limited overshoot of 1.5&nbsp;°C, global net anthropogenic {{CO2}} emissions decline by about 45% from 2010 levels by 2030 (40–60% interquartile range), reaching net zero around 2050 (2045–2055 interquartile range)"</ref><ref>{{harvnb|IPCC SR15|2018|loc=SPM C.3|p=17}}: "All pathways that limit global warming to 1.5&nbsp;°C with limited or no overshoot project the use of carbon dioxide removal (CDR) on the order of 100–1000 Gt{{CO2}} over the 21st century. CDR would be used to compensate for residual emissions and, in most cases, achieve net negative emissions to return global warming to 1.5&nbsp;°C following a peak (high confidence). CDR deployment of several hundreds of Gt{{CO2}} is subject to multiple feasibility and sustainability constraints (high confidence)."</ref>
			] by ] and switching to energy sources that do not produce significant carbon pollution. These energy sources include ], ], ], and ].<ref>
	An increase in global temperatures can in turn cause other ], including ], and changes in the amount and pattern of ]. There may also be increases in the frequency and intensity of ] events, though it is difficult to connect specific events to global warming. Other effects may include changes in agricultural yields, ], reduced summer streamflows, species ] and increases in the ranges of ].
			* {{harvnb|IPCC AR5 WG3 Annex III|2014|p=1335}}
			* {{harvnb|IPCC AR6 WG3 Summary for Policymakers|2022|pp=24–25}}
			* {{harvnb|IPCC AR6 WG3 Technical Summary|2022|p=89}}</ref> Cleanly generated electricity can replace fossil fuels for ], ], and running industrial processes.<ref>{{harvnb|IPCC AR6 WG3 Technical Summary|2022|p=84}}: "Stringent emissions reductions at the level required for 2°C or 1.5°C are achieved through the increased electrification of buildings, transport, and industry, consequently all pathways entail increased electricity generation (high confidence)."</ref> Carbon can also be ], for instance by ] and farming with methods that ].<ref>
			* {{harvnb|IPCC SRCCL Summary for Policymakers|2019|p=18}}
			* {{harvnb|IPCC AR6 WG3 Summary for Policymakers|2022|pp=24–25}}
			* {{harvnb|IPCC AR6 WG3 Technical Summary|2022|p=114}}</ref>
			{{TOC level|3}} <!--Please do not uncollapse the TOC without prior discussion (see discussion on talk page from May 2022).-->
	Remaining scientific ] include the exact degree of climate change expected in the future, and how changes will vary from region to region around the globe. There is ongoing ] and ] regarding what, if any, action should be taken to ] or to ]. ] have signed and ratified the ] aimed at combating greenhouse gas emissions.
			== Terminology ==<!--An excerpt of this section has been added to ] in September 2022.-->
	==Terminology==
	The term "global warming" is a specific example of the broader term ], which can also refer to ]. In principle, global warming is neutral as to the period or causes, but in both common and scientific usage the term generally refers to recent warming and implies a human influence.<ref>{{cite web | title = Climate Change: Basic Information | publisher = ] | url = http://epa.gov/climatechange/basicinfo.html | accessdate = 2007-02-09 | date = ] | quote = In common usage, 'global warming' often refers to the warming that can occur as a result of increased emissions of greenhouse gases from human activities.}}</ref> The ] (UNFCCC) uses the term "climate change" for human-caused change, and "climate variability" for other changes.<ref>{{cite web | title = United Nations Framework Convention on Climate Change, Article I | publisher = ] | url = http://unfccc.int/essential_background/convention/background/items/2536.php | accessdate = 2007-01-15 }}</ref> The term "anthropogenic climate change" is sometimes used when focusing on human-induced changes.
			Before the 1980s it was unclear whether the warming effect of ] was stronger than the ] in ]. Scientists used the term ''inadvertent climate modification'' to refer to human impacts on the climate at this time.<ref name="Conway 2008">{{harvnb|NASA, 5 December|2008}}.</ref> In the 1980s, the terms ''global warming'' and ''climate change'' became more common, often being used interchangeably.<ref>{{harvnb|NASA, 7 July|2020}}</ref><ref>{{Harvnb|Shaftel|2016}}: "{{thinsp}}'Climate change' and 'global warming' are often used interchangeably but have distinct meanings.&nbsp;... Global warming refers to the upward temperature trend across the entire Earth since the early 20th century&nbsp;... Climate change refers to a broad range of global phenomena&nbsp;... include the increased temperature trends described by global warming."</ref><ref>{{harvnb|Associated Press, 22 September|2015}}: "The terms global warming and climate change can be used interchangeably. Climate change is more accurate scientifically to describe the various effects of greenhouse gases on the world because it includes extreme weather, storms and changes in rainfall patterns, ocean acidification and sea level.".</ref> Scientifically, ''global warming'' refers only to increased surface warming, while ''climate change'' describes both global warming and its effects on Earth's ], such as precipitation changes.<ref name="Conway 2008"/>
	==Causes==
	{{main|Attribution of recent climate change|scientific opinion on climate change}}
	] during the last 400,000 years and the rapid rise since the ]; changes in the Earth's orbit around the Sun, known as ], are believed to be the pacemaker of the 100,000 year ] cycle.]]
			''Climate change'' can also be used more broadly to include ] that have happened throughout Earth's history.<ref>{{Harvnb|IPCC AR5 SYR Glossary|2014|p=120}}: "Climate change refers to a change in the state of the climate that can be identified (e.g., by using statistical tests) by changes in the mean and/or the variability of its properties and that persists for an extended period, typically decades or longer. Climate change may be due to natural internal processes or external forcings such as modulations of the solar cycles, volcanic eruptions and persistent anthropogenic changes in the composition of the atmosphere or in land use."</ref> ''Global warming''—used as early as 1975<ref name=Science_Broecker_19750808>{{cite journal |last1=Broecker |first1=Wallace S. |title=Climatic Change: Are We on the Brink of a Pronounced Global Warming? |journal=] |date=8 August 1975 |volume=189 |issue=4201 |pages=460–463 |doi=10.1126/science.189.4201.460 |jstor=1740491 |pmid=17781884 |bibcode=1975Sci...189..460B |s2cid=16702835 |url=https://www.jstor.org/stable/1740491}}</ref>—became the more popular term after ] climate scientist ] used it in his 1988 testimony in the ].<ref name="history.aip.org2">{{harvnb|Weart "The Public and Climate Change: The Summer of 1988"}}, .</ref> Since the 2000s, ''climate change'' has increased usage.<ref>{{harvnb|Joo|Kim|Do|Lineman|2015}}.</ref> Various scientists, politicians and media may use the terms '']'' or '']'' to talk about climate change, and may use the term ''global heating'' instead of ''global warming''.<ref>{{harvnb|Hodder|Martin|2009}}</ref><ref>{{harvnb|BBC Science Focus Magazine, 3 February|2020}}</ref>
	The climate system varies through natural, internal processes and in response to variations in external forcing factors including ], ] emissions, variations in the earth's orbit (]) and ]es. The detailed ] remain an active field of research, but the ]<ref>{{cite web |title=Joint science academies' statement: The science of climate change | url=http://www.royalsoc.ac.uk/displaypagedoc.asp?id=13619 | format=] | quote=The work of the Intergovernmental Panel on Climate Change (IPCC) represents the consensus of the international scientific community on climate change science| publisher = ] | date =] |accessdate=2007-04-01}}</ref> identifies increased levels of greenhouse gases due to human activity as the main influence. This attribution is clearest for the most recent 50 years, for which the most detailed data are available. Contrasting with the scientific consensus, other hypotheses have been proposed to explain some of the observed increase in global temperatures, including: the warming is within the range of natural variation; the warming is a consequence of coming out of a prior cool period, namely the ]; or the warming is primarily a result of variances in ].<ref>{{cite web | title=The truth about global warming - it's the Sun that's to blame | first=Michael | last=Leidig | coauthors=Nikkhah, Roya | publisher=] | date=] | accessdate = 2007-04-29 | url=http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2004/07/18/wsun18.xml&sSheet=/news/2004/07/18/ixnewstop.html}}</ref>
			== Global temperature rise ==
	None of the effects of forcing are instantaneous. Due to the ] of the Earth's oceans and slow responses of other indirect effects, the Earth's current climate is not in equilibrium with the forcing imposed. ] indicate that even if greenhouse gases were stabilized at present day levels, a further warming of about {{nowrap|0.5 °C}} {{nowrap|(0.9 °F)}} would still occur.<ref>{{cite journal |last=Meehl |first=Gerald A. |coauthors=''et al.'' |date=] |title=How Much More Global Warming and Sea Level Rise |journal=] |volume=307 |issue=5716 |pages=1769–1772 |doi=10.1126/science.1106663 |url=http://www.sciencemag.org/cgi/content/full/307/5716/1769 |accessdate=2007-02-11}}</ref>
			{{Further|Global surface temperature}}
			=== Temperatures prior to present-day global warming ===
	===Greenhouse gases in the atmosphere===
			{{Main|Climate variability and change|Temperature record of the last 2,000 years|Paleoclimatology}}
	{{main|Greenhouse effect}}
			] reconstruction over the last 2000 years using proxy data from tree rings, corals, and ice cores in blue.<ref>{{harvnb|Neukom|Barboza|Erb|Shi|2019b}}.</ref> Directly observed data is in red.<ref name="nasa temperatures">{{cite web |title=Global Annual Mean Surface Air Temperature Change |url=https://data.giss.nasa.gov/gistemp/graphs_v4/ |access-date=23 February 2020 |publisher=]}}</ref>]]
	]
			Over the last few million years the climate cycled through ]. One of the hotter periods was the ], around 125,000 years ago, where temperatures were between 0.5&nbsp;°C and 1.5&nbsp;°C warmer than before the start of global warming.{{sfn|IPCC AR6 WG1 Ch2|2021|pp=294, 296}} This period saw sea levels 5 to 10 metres higher than today. The most ] 20,000 years ago was some 5–7&nbsp;°C colder. This period has sea levels that were over {{convert|125|m|ft}} lower than today.{{sfn|IPCC AR6 WG1 Ch2|2021|p=366}}
			Temperatures stabilized in the current interglacial period beginning ].<ref>{{cite journal |last1=Marcott |first1=S. A. |last2=Shakun |first2=J. D. |last3=Clark |first3=P. U. |last4=Mix |first4=A. C. |title=A reconstruction of regional and global temperature for the past 11,300 years |journal=] |year=2013 |volume=339 |issue=6124 |pages=1198–1201 |doi=10.1126/science.1228026|pmid=23471405 |bibcode=2013Sci...339.1198M }}</ref> This period also saw the start of agriculture.{{sfn|IPCC AR6 WG1 Ch2|2021|p=296}} Historical patterns of warming and cooling, like the ] and the ], did not occur at the same time across different regions. Temperatures may have reached as high as those of the late 20th century in a limited set of regions.<ref>{{harvnb|IPCC AR5 WG1 Ch5|2013|p=386}}</ref><ref>{{harvnb|Neukom|Steiger|Gómez-Navarro|Wang|2019a}}</ref> Climate information for that period comes from ], such as trees and ]s.<ref name="SR15 Ch1 p57">{{harvnb|IPCC SR15 Ch1|2018|p=57}}: "This report adopts the 51-year reference period, 1850–1900 inclusive, assessed as an approximation of pre-industrial levels in AR5&nbsp;... Temperatures rose by 0.0&nbsp;°C–0.2&nbsp;°C from 1720–1800 to 1850–1900"</ref><ref>{{harvnb|Hawkins|Ortega|Suckling|Schurer|2017|p=1844}}</ref>
	The ] was discovered by ] in 1824 and was first investigated quantitatively by ] in 1896. It is the process by which absorption and emission of ] radiation by ] warms a ]'s atmosphere and surface.
			=== Warming since the Industrial Revolution ===
	Greenhouse gases create a natural greenhouse effect, without which, mean temperatures on Earth would be an estimated 30&nbsp;°C (54&nbsp;°F) lower, so that Earth would be uninhabitable.<ref>{{cite paper|title=Living with Climate Change – An Overview of Potential Climate Change Impacts on Australia. Summary and Outlook |publisher=] |date=December 2002 |format=] |accessdate=2007-04-18 |url=http://www.greenhouse.gov.au/impacts/overview/pubs/overview4.pdf}}</ref> Thus scientists do not "believe in" or "oppose" the greenhouse effect as such; rather, the debate concerns the net effect of the addition of greenhouse gases, while allowing for associated ] and ] mechanisms.
			]
			] during recent decades as the oceans absorb over 90% of the ].<ref name=NOAA_NASA_OHC_1957_>''Top 700 meters:'' {{cite web |last1=Lindsey |first1=Rebecca |last2=Dahlman |first2=Luann |title=Climate Change: Ocean Heat Content |url=https://www.climate.gov/news-features/understanding-climate/climate-change-ocean-heat-content |website=climate.gov |publisher=National Oceanic and Atmospheric Administration (NOAA) |archive-url=https://archive.today/20231029171303/https://www.climate.gov/news-features/understanding-climate/climate-change-ocean-heat-content |archive-date=29 October 2023 |date=6 September 2023 |url-status=live }} ● ''Top 2000 meters:'' {{cite web |title=Ocean Warming / Latest Measurement: December 2022 / 345 (± 2) zettajoules since 1955 |url=https://climate.nasa.gov/vital-signs/ocean-warming/ |website=NASA.gov |publisher=National Aeronautics and Space Administration |archive-url=https://web.archive.org/web/20231020033606/https://climate.nasa.gov/vital-signs/ocean-warming/ |archive-date=20 October 2023 |url-status=live}}</ref>]]
			Around 1850 ] records began to provide global coverage.<ref name="AR5 WG1 SPM p4-5">{{Harvnb|IPCC AR5 WG1 Summary for Policymakers|2013|pp=4–5}}: "Global-scale observations from the instrumental era began in the mid-19th century for temperature and other variables&nbsp;... the period 1880 to 2012&nbsp;... multiple independently produced datasets exist."</ref>
			Between the 18th century and 1970 there was little net warming, as the warming impact of greenhouse gas emissions was offset by cooling from ] emissions. Sulfur dioxide causes ], but it also produces ] aerosols in the atmosphere, which reflect sunlight and cause ]. After 1970, the increasing accumulation of greenhouse gases and controls on sulfur pollution led to a marked increase in temperature.<ref>{{cite news |url=https://www.washingtonpost.com/climate-environment/2023/12/26/global-warming-accelerating-climate-change/ |title=Is climate change speeding up? Here's what the science says. |last1=Mooney |first1=Chris | last2=Osaka |first2=Shannon |date=26 December 2023 |newspaper=The Washington Post |access-date=18 January 2024}}</ref><ref name="NASA2007">{{cite news |date=15 March 2007 |title=Global 'Sunscreen' Has Likely Thinned, Report NASA Scientists |url=http://www.nasa.gov/centers/goddard/news/topstory/2007/aerosol_dimming.html |publisher=]}}</ref><ref name="Quaas2022" />
			]
			Ongoing changes in climate have had no precedent for several thousand years.<ref>{{harvnb|IPCC AR6 WG1 Technical Summary|2021|p=43}}</ref> Multiple independent datasets all show worldwide increases in surface temperature,<ref>{{harvnb|EPA|2016}}: "The U.S. Global Change Research Program, the National Academy of Sciences, and the Intergovernmental Panel on Climate Change (IPCC) have each independently concluded that warming of the climate system in recent decades is "unequivocal". This conclusion is not drawn from any one source of data but is based on multiple lines of evidence, including three worldwide temperature datasets showing nearly identical warming trends as well as numerous other independent indicators of global warming (e.g. rising sea levels, shrinking Arctic sea ice)."</ref> at a rate of around 0.2&nbsp;°C per decade.<ref>{{Harvnb|IPCC SR15 Ch1|2018|p=81}}.</ref> The 2014–2023 decade warmed to an average 1.19&nbsp;°C compared to the pre-industrial baseline (1850–1900).<ref>{{harvnb|Forster|Smith|Walsh|Lamb|2024|p=2626}}</ref> Not every single year was warmer than the last: internal ] processes can make any year 0.2&nbsp;°C warmer or colder than the average.<ref name="Samset2020">{{cite journal |last1=Samset |first1=B. H. |last2=Fuglestvedt |first2=J. S. |last3=Lund |first3=M. T. |title=Delayed emergence of a global temperature response after emission mitigation |journal=Nature Communications |date=7 July 2020 |volume=11 |issue=1 |page=3261 |doi=10.1038/s41467-020-17001-1 |pmid=32636367 |pmc=7341748 |bibcode=2020NatCo..11.3261S |quote=At the time of writing, that translated into 2035–2045, where the delay was mostly due to the impacts of the around 0.2 °C of natural, interannual variability of global mean surface air temperature |hdl=11250/2771093 |hdl-access=free }}</ref> From 1998 to 2013, negative phases of two such processes, ]<ref name="SeipGrønWang2023PacificDecadalOscillation">{{Cite journal |last1=Seip |first1=Knut L. |last2=Grøn |first2=ø. |last3=Wang |first3=H. |date=31 August 2023 |title=Global lead-lag changes between climate variability series coincide with major phase shifts in the Pacific decadal oscillation |journal=] |volume=154 |issue=3–4 |language=en |doi=10.1007/s00704-023-04617-8 |issn=0177-798X |pages=1137–1149 |bibcode=2023ThApC.154.1137S |s2cid=261438532 |doi-access=free |hdl=11250/3088837 |hdl-access=free }}</ref> and ]<ref>{{Cite journal |last1=Yao |first1=Shuai-Lei |last2=Huang |first2=Gang |last3=Wu |first3=Ren-Guang |last4=Qu |first4=Xia |date=January 2016 |title=The global warming hiatus—a natural product of interactions of a secular warming trend and a multi-decadal oscillation |url=http://link.springer.com/10.1007/s00704-014-1358-x |journal=] |language=en |volume=123 |issue=1–2 |pages=349–360 |doi=10.1007/s00704-014-1358-x |bibcode=2016ThApC.123..349Y |s2cid=123602825 |issn=0177-798X |access-date=20 September 2023}}</ref> caused a short slower period of warming called the "]".<ref>{{Cite journal |last1=Xie |first1=Shang-Ping |last2=Kosaka |first2=Yu |date=June 2017 |title=What Caused the Global Surface Warming Hiatus of 1998–2013? |url=http://link.springer.com/10.1007/s40641-017-0063-0 |journal=Current Climate Change Reports |language=en |volume=3 |issue=2 |pages=128–140 |doi=10.1007/s40641-017-0063-0 |bibcode=2017CCCR....3..128X |s2cid=133522627 |issn=2198-6061 |access-date=20 September 2023}}</ref> After the "hiatus", the opposite occurred, with years like 2023 exhibiting temperatures well above even the recent average.<ref name="Copernicus2023">{{Cite web |date=21 November 2023 |title=Global temperature exceeds 2&nbsp;°C above pre-industrial average on 17 November |url=https://climate.copernicus.eu/global-temperature-exceeds-2degc-above-pre-industrial-average-17-november |website=] |access-date=31 January 2024 |quote=While exceeding the 2&nbsp;°C threshold for a number of days does not mean that we have breached the Paris Agreement targets, the more often that we exceed this threshold, the more serious the cumulative effects of these breaches will become.}}</ref> This is why the temperature change is defined in terms of a 20-year average, which reduces the noise of hot and cold years and decadal climate patterns, and detects the long-term signal.<ref name="IPCC_AR6_WGI_SPM">IPCC, 2021: . In: . Cambridge University Press, Cambridge, United Kingdom and New York, New York, US, pp. 3−32, doi:10.1017/9781009157896.001.</ref>{{rp|5}}<ref>{{Cite web |last=McGrath |first=Matt |date=17 May 2023 |title=Global warming set to break key 1.5C limit for first time |url=https://www.bbc.com/news/science-environment-65602293 |website=] |access-date=31 January 2024 |quote=The researchers stress that temperatures would have to stay at or above 1.5C for 20 years to be able to say the Paris agreement threshold had been passed. }}</ref>
			A wide range of other observations reinforce the evidence of warming.<ref>{{harvnb|Kennedy|Thorne|Peterson|Ruedy|2010|p=S26}}. Figure 2.5.</ref>{{sfn|Loeb et al.|2021}} The upper atmosphere is cooling, because ]es are trapping heat near the Earth's surface, and so less heat is radiating into space.<ref>{{cite web |url=https://earthobservatory.nasa.gov/features/GlobalWarming |title=Global Warming |date=3 June 2010 |publisher=] |access-date=11 September 2020 |quote=Satellite measurements show warming in the troposphere but cooling in the stratosphere. This vertical pattern is consistent with global warming due to increasing greenhouse gases but inconsistent with warming from natural causes.}}</ref> Warming reduces average snow cover and ]. At the same time, warming also causes ], leading to more ], more and heavier ].<ref>{{harvnb|Kennedy|Thorne|Peterson|Ruedy|2010|pp=S26, S59–S60}}</ref><ref>{{harvnb|USGCRP Chapter 1|2017|p=35}}</ref> Plants are ] earlier in spring, and thousands of animal species have been permanently moving to cooler areas.<ref>{{harvnb|IPCC AR6 WG2|2022|pp=257–260}}</ref>
	On Earth, the major natural greenhouse gases are ], which causes about 36–70% of the greenhouse effect (]); ] (CO<sub>2</sub>), which causes 9–26%; ] (CH<sub>4</sub>), which causes 4–9%; and ], which causes 3–7%. The ] of CO<sub>2</sub> and CH<sub>4</sub> have increased by 31% and 149% respectively above pre-industrial levels since 1750. These levels are considerably higher than at any time during the last 650,000 years, the period for which reliable data has been extracted from ]s. From less direct geological evidence it is believed that CO<sub>2</sub> values this high were last attained 20 million years ago.<ref>{{cite journal| first=Paul N.| last=Pearson| coauthors=Palmer, Martin R.| journal=]| title= Atmospheric carbon dioxide concentrations over the past 60 million years| date=]| volume=406| issue=6797| pages=695-699| url=http://www.nature.com/nature/journal/v406/n6797/abs/406695a0.html| doi=10.1038/35021000}}</ref> "About three-quarters of the anthropogenic emissions of CO<sub>2</sub> to the atmosphere during the past 20 years are due to ] burning. The rest of the anthropogenic emissions are predominantly due to land-use change, especially ]."<ref>{{cite web |url=http://www.grida.no/climate/ipcc_tar/wg1/006.htm |title=Summary for Policymakers |work=Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change |accessdate=2007-01-18 |date=] |publisher=]}}</ref>
			==== Differences by region ====
	The present atmospheric concentration of CO<sub>2</sub> is about 383 parts per million (ppm) by volume.<ref>{{cite web | title = Trends in Atmospheric Carbon Dioxide – Mauna Loa | last = Tans | first = Pieter | url = http://www.esrl.noaa.gov/gmd/ccgg/trends/ | publisher = ] | accessdate = 2007-04-28}}</ref> Future CO<sub>2</sub> levels are expected to rise due to ongoing burning of fossil fuels and land-use change. The rate of rise will depend on uncertain economic, sociological, technological, natural developments, but may be ultimately limited by the availability of fossil fuels. The IPCC ] gives a wide range of future CO<sub>2</sub> scenarios, ranging from 541 to 970 ppm by the year 2100.<ref>{{cite web |url=http://www.grida.no/climate/ipcc_tar/wg1/123.htm |last = Prentice |first = I. Colin |coauthors = ''et al.'' |title = 3.7.3.3 SRES scenarios and their implications for future CO2 concentration |work = Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change |accessdate=2007-04-28 |date=] |publisher=]}}</ref> Fossil fuel reserves are sufficient to reach this level and continue emissions past 2100, if coal, tar sands or ]s are extensively used.<ref>{{cite web |url=http://www.grida.no/climate/ipcc/emission/104.htm |title=4.4.6. Resource Availability |work=IPCC Special Report on Emissions Scenarios |accessdate=2007-04-28 |publisher=]}}</ref>
			Different regions of the world ]. The pattern is independent of where greenhouse gases are emitted, because the gases persist long enough to diffuse across the planet. Since the pre-industrial period, the average surface temperature over land regions has increased almost twice as fast as the global average surface temperature.<ref>{{harvnb|IPCC SRCCL Summary for Policymakers|2019|p=7}}</ref> This is because oceans lose more heat by ] and ].<ref>{{Harvnb|Sutton|Dong|Gregory|2007}}.</ref> The thermal energy in the global climate system has grown with only brief pauses since at least 1970, and over 90% of this extra energy has been ].<ref name="ocean heat absorption">{{cite web|title=Climate Change: Ocean Heat Content |newspaper=Noaa Climate.gov |publisher=] |year=2018 |url=https://www.climate.gov/news-features/understanding-climate/climate-change-ocean-heat-content|archive-url=https://web.archive.org/web/20190212110601/https://www.climate.gov/news-features/understanding-climate/climate-change-ocean-heat-content|archive-date=12 February 2019 |url-status=live|access-date=20 February 2019}}</ref><ref name="Harvipccar5">{{Harvnb|IPCC AR5 WG1 Ch3|2013|p=257}}: "] dominates the global energy change inventory. Warming of the ocean accounts for about 93% of the increase in the Earth's energy inventory between 1971 and 2010 (high confidence), with warming of the upper (0 to 700 m) ocean accounting for about 64% of the total.</ref> The rest has heated the ], melted ice, and warmed the continents.<ref name=EarthSysSciData_20200907>{{cite journal |last1=von Schuckman |first1=K. |last2=Cheng |first2=L. |last3=Palmer |first3=M. D. |last4=Hansen |first4=J. |last5=Tassone |first5=C. |last6=Aich |first6=V. |last7=Adusumilli |first7=S. |last8=Beltrami |first8=H. |last9=Boyer |first9=T. |last10=Cuesta-Valero |first10=F. J. |display-authors=4 |title=Heat stored in the Earth system: where does the energy go? |journal=Earth System Science Data |date=7 September 2020 |doi=10.5194/essd-12-2013-2020 |doi-access=free |url=https://essd.copernicus.org/articles/12/2013/2020/ |volume=12 |issue=3 |pages=2013–2041|bibcode=2020ESSD...12.2013V |hdl=20.500.11850/443809 |hdl-access=free }}</ref>
			The ] and the ] have warmed much faster than the ] and ]. The Northern Hemisphere not only has much more land, but also more seasonal snow cover and ]. As these surfaces flip from reflecting a lot of light to being dark after the ice has melted, they start ].<ref>{{harvnb|NOAA, 10 July|2011}}.</ref> Local ] deposits on snow and ice also contribute to Arctic warming.<ref>{{harvnb|United States Environmental Protection Agency|2016|p=5}}: "Black carbon that is deposited on snow and ice darkens those surfaces and decreases their reflectivity (albedo). This is known as the snow/ice albedo effect. This effect results in the increased absorption of radiation that accelerates melting."</ref> Arctic surface temperatures are increasing ] than in the rest of the world.<ref name="3X2021">{{cite web |date=20 May 2021 |title=Arctic warming three times faster than the planet, report warns |url=https://phys.org/news/2021-05-arctic-faster-planet.html |website=] |language=en |access-date=6 October 2022}}</ref><ref name="Rantanen2022">{{Cite journal |last1=Rantanen |first1=Mika |last2=Karpechko |first2=Alexey Yu |last3=Lipponen |first3=Antti |last4=Nordling |first4=Kalle |last5=Hyvärinen |first5=Otto |last6=Ruosteenoja |first6=Kimmo |last7=Vihma |first7=Timo |last8=Laaksonen |first8=Ari |date=11 August 2022 |title=The Arctic has warmed nearly four times faster than the globe since 1979 |journal=Communications Earth & Environment |language=en |volume=3 |issue=1 |page=168 |doi=10.1038/s43247-022-00498-3 |s2cid=251498876 |issn=2662-4435|doi-access=free |bibcode=2022ComEE...3..168R |hdl=11250/3115996 |hdl-access=free }}</ref><ref name="4X2021">{{cite web |date=14 December 2021 |title=The Arctic is warming four times faster than the rest of the world |url=https://www.science.org/content/article/arctic-warming-four-times-faster-rest-world |language=en |access-date=6 October 2022}}</ref> Melting of ]s near the poles weakens both the ] and the ] limb of ], which further changes the distribution of heat and ] around the globe.<ref>{{Cite journal |last1=Liu |first1=Wei |last2=Fedorov |first2=Alexey V. |last3=Xie |first3=Shang-Ping |last4=Hu |first4=Shineng |date=26 June 2020 |title=Climate impacts of a weakened Atlantic Meridional Overturning Circulation in a warming climate |journal=Science Advances |volume=6 |issue=26 |pages=eaaz4876 |doi=10.1126/sciadv.aaz4876 |pmid=32637596 |pmc=7319730 |bibcode=2020SciA....6.4876L }}</ref><ref name="PearceYale3602023">{{cite web |last=Pearce |first=Fred |date=18 April 2023 |title=New Research Sparks Concerns That Ocean Circulation Will Collapse |url=https://e360.yale.edu/features/climate-change-ocean-circulation-collapse-antarctica |language=en |access-date=3 February 2024 }}</ref><ref name="Lee2023">{{Cite journal |last1=Lee |first1=Sang-Ki |last2=Lumpkin |first2=Rick |last3=Gomez |first3=Fabian |last4=Yeager |first4=Stephen |last5=Lopez |first5=Hosmay |last6=Takglis |first6=Filippos |last7=Dong |first7=Shenfu |last8=Aguiar |first8=Wilton |last9=Kim |first9=Dongmin |last10=Baringer |first10=Molly |date=13 March 2023 |title=Human-induced changes in the global meridional overturning circulation are emerging from the Southern Ocean |journal=Communications Earth & Environment |volume=4 |issue=1 |page=69 |doi=10.1038/s43247-023-00727-3 |bibcode=2023ComEE...4...69L |doi-access=free }}</ref><ref name="NOAA2023">{{cite web |date=29 March 2023 |title=NOAA Scientists Detect a Reshaping of the Meridional Overturning Circulation in the Southern Ocean |url=https://www.aoml.noaa.gov/noaa-scientists-detect-reshaping-of-the-meridional-overturning-circulation-in-southern-ocean/ |publisher=] }}</ref>
	Positive feedback effects such as the expected release of CH<sub>4</sub> from the melting of ] ] ]s in ] (possibly up to 70,000 million ]s) may lead to significant additional sources of greenhouse gas emissions<ref>{{cite news | first=Ian | last=Sample | title=Warming Hits 'Tipping Point' | date=] | url=http://www.guardian.co.uk/climatechange/story/0,12374,1546824,00.html | publisher=] | accessdate=2007-01-18}}</ref> not included in climate models cited by the IPCC.<ref name=grida7/>
			=== Future global temperatures ===
	===Feedbacks===
			] multi-model projections of ] changes for the year 2090 relative to the 1850–1900 average. The current trajectory for warming by the end of the century is roughly halfway between these two extremes.<ref name="UNEP2024" /><ref name="Schuur2022">{{Cite journal |last1=Schuur |first1=Edward A. G. |last2=Abbott |first2=Benjamin W. |last3=Commane |first3=Roisin |last4=Ernakovich |first4=Jessica |last5=Euskirchen |first5=Eugenie |last6=Hugelius |first6=Gustaf |last7=Grosse |first7=Guido |last8=Jones |first8=Miriam |last9=Koven |first9=Charlie |last10=Leshyk |first10=Victor |last11=Lawrence |first11=David |last12=Loranty |first12=Michael M. |last13=Mauritz |first13=Marguerite |last14=Olefeldt |first14=David |last15=Natali |first15=Susan |year=2022 |title=Permafrost and Climate Change: Carbon Cycle Feedbacks From the Warming Arctic |journal=Annual Review of Environment and Resources |volume=47 |pages=343–371 |bibcode=2022ARER...47..343S |doi=10.1146/annurev-environ-012220-011847 |quote="Medium-range estimates of Arctic carbon emissions could result from moderate climate emission mitigation policies that keep global warming below 3&nbsp;°C (e.g., RCP4.5). This global warming level most closely matches country emissions reduction pledges made for the Paris Climate Agreement..." |doi-access=free |last16=Rodenhizer |first16=Heidi |last17=Salmon |first17=Verity |last18=Schädel |first18=Christina |last19=Strauss |first19=Jens |last20=Treat |first20=Claire |last21=Turetsky |first21=Merritt}}</ref><ref name="Phiddian2022">{{Cite web |last=Phiddian |first=Ellen |date=5 April 2022 |title=Explainer: IPCC Scenarios |url=https://cosmosmagazine.com/earth/climate/explainer-ipcc-scenarios/ |website=] |access-date=30 September 2023 |quote="The IPCC doesn't make projections about which of these scenarios is more likely, but other researchers and modellers can. ], for instance, released a report last year stating that our current emissions trajectory had us headed for a 3&nbsp;°C warmer world, roughly in line with the middle scenario. ] predicts 2.5 to 2.9&nbsp;°C of warming based on current policies and action, with pledges and government agreements taking this to 2.1&nbsp;°C.}}</ref>]]
	The effects of forcing agents on the climate are complicated by various feedback processes.
			The ] estimates there is an 80% chance that global temperatures will exceed 1.5&nbsp;°C warming for at least one year between 2024 and 2028. The chance of the 5-year average being above 1.5&nbsp;°C is almost half.{{sfn|WMO|2024b|p=2}}
			The IPCC expects the 20-year average global temperature to exceed +1.5&nbsp;°C in the early 2030s.<ref>{{Cite web |date=7 August 2021 |title=Climate Change 2021 - The Physical Science Basis |url=https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Full_Report.pdf#page=955 |url-status=live |archive-url=https://web.archive.org/web/20240405072633/https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Full_Report.pdf#page=955 |archive-date=5 April 2024 |website=Intergovernmental Panel on Climate Change |id=IPCC AR6 WGI}}</ref> The ] (2021) included projections that by 2100 global warming is very likely to reach 1.0–1.8&nbsp;°C under a ], 2.1–3.5&nbsp;°C under an ],
	One of the most pronounced feedback effects relates to the evaporation of water. CO<sub>2</sub> injected into the atmosphere causes a warming of the atmosphere and the earth's surface. The warming causes more water to be evaporated into the atmosphere. Since water vapor itself acts as a greenhouse gas, this causes still more warming; the warming causes more water vapor to be evaporated, and so forth until a new dynamic equilibrium concentration of water vapor is reached at a slight increase in humidity and with a much larger greenhouse effect than that due to CO<sub>2</sub> alone.<ref name=soden1>{{cite journal| first= Brian J. | last= Soden | coauthors= Held, Isacc M. | journal= ] | title= An Assessment of Climate Feedbacks in Coupled Ocean–Atmosphere Models | date= ] | volume= 19 | issue= 14 | page= 3354-3360 | url= http://www.gfdl.noaa.gov/reference/bibliography/2006/bjs0601.pdf | format= ] | accessdate= 2007-04-21 | quote=Interestingly, the true feedback is consistently weaker than the constant relative humidity value, implying a small but robust reduction in relative humidity in all models on average" "clouds appear to provide a positive feedback in all models}}</ref> This feedback effect can only be reversed slowly as CO<sub>2</sub> has a long average ].
			or 3.3–5.7&nbsp;°C under ].<ref>{{harvnb|IPCC AR6 WG1 Summary for Policymakers|2021|p=SPM-17}}</ref> The warming will continue past 2100 in the intermediate and high emission scenarios,<ref name="Meinshausen2011">{{Cite journal |last1=Meinshausen |first1=Malte |last2=Smith |first2=S. J. |last3=Calvin |first3=K. |last4=Daniel |first4=J. S. |last5=Kainuma |first5=M. L. T. |last6=Lamarque |first6=J-F. |last7=Matsumoto |first7=K. |last8=Montzka |first8=S. A. |last9=Raper |first9=S. C. B. |last10=Riahi |first10=K. |last11=Thomson |first11=A. |last12=Velders |first12=G. J. M. |last13=van Vuuren |first13=D.P. P. |year=2011 |title=The RCP greenhouse gas concentrations and their extensions from 1765 to 2300 |journal=Climatic Change |language=en |volume=109 |issue=1–2 |pages=213–241 |doi=10.1007/s10584-011-0156-z |bibcode=2011ClCh..109..213M |issn=0165-0009|doi-access=free }}</ref><ref name="Lyon2021">{{cite journal |last1=Lyon |first1=Christopher |last2=Saupe |first2=Erin E. |last3=Smith |first3=Christopher J. |last4=Hill |first4=Daniel J. |last5=Beckerman |first5=Andrew P. |last6=Stringer |first6=Lindsay C. |last7=Marchant |first7=Robert |last8=McKay |first8=James |last9=Burke |first9=Ariane |last10=O'Higgins |first10=Paul |last11=Dunhill |first11=Alexander M. |last12=Allen |first12=Bethany J. |last13=Riel-Salvatore |first13=Julien |last14=Aze |first14=Tracy |year=2021 |title=Climate change research and action must look beyond 2100 |journal=Global Change Biology |language=en |volume=28 |issue=2 |pages=349–361 |doi=10.1111/gcb.15871 |issn=1365-2486 |pmid=34558764 |s2cid=237616583 |doi-access=free|hdl=20.500.11850/521222 |hdl-access=free }}</ref> with future projections of global surface temperatures by year 2300 being similar to millions of years ago.<ref>{{harvnb|IPCC AR6 WG1 Technical Summary|2021|pp=43–44}}</ref>
			The remaining ] for staying beneath certain temperature increases is determined by modelling the carbon cycle and ] to greenhouse gases.<ref>{{harvnb|Rogelj|Forster|Kriegler|Smith|2019}}</ref> According to ], global warming can be kept below 1.5&nbsp;°C with a 50% chance if emissions after 2023 do not exceed 200 gigatonnes of {{CO2}}. This corresponds to around 4 years of current emissions. To stay under 2.0&nbsp;°C, the carbon budget is 900 gigatonnes of {{CO2}}, or 16 years of current emissions.{{sfn|United Nations Environment Programme|2024|pp=XI, XVII}}
	Feedback effects due to clouds are an area of ongoing research and debate. Seen from below, clouds absorb infrared radiation and so exert a warming effect. Seen from above, the same clouds reflect sunlight and so exert a cooling effect. Increased global water vapor concentration may or may not cause an increase in global average cloud cover. The net effect of clouds thus has not been well modeled, however, cloud feedback is second only to water vapor feedback and is positive in all the models that contributed to the IPCC Fourth Assessment Report.<ref name=soden1/>
			== Causes of recent global temperature rise ==
	Another important feedback process is ice-albedo feedback.<ref>{{cite web |url=http://www.grida.no/climate/ipcc_tar/wg1/295.htm |last = Stocker |first = Thomas F. |coauthors = ''et al.'' |title = 7.5.2 Sea Ice |work = Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change |accessdate=2007-02-11 |date=] |publisher=]}}</ref> The increased CO<sub>2</sub> in the atmosphere warms the Earth's surface and leads to melting of ice near the poles. As the ice melts, land or open water takes its place. Both land and open water are on average less reflective than ice, and thus absorb more solar radiation. This causes more warming, which in turn causes more melting, and this cycle continues.
			{{Main|Causes of climate change}}
			] of global warming that has happened so far. Future ] for long lived drivers like carbon dioxide emissions is not represented. Whiskers on each bar show the possible ].]]
			The climate system experiences various cycles on its own which can last for years, decades or even centuries. For example, ] events cause short-term spikes in surface temperature while ] events cause short term cooling.<ref>{{cite journal |last1=Brown |first1=Patrick T. |last2=Li |first2=Wenhong |last3=Xie |first3=Shang-Ping |title=Regions of significant influence on unforced global mean surface air temperature variability in climate models: Origin of global temperature variability |journal=Journal of Geophysical Research: Atmospheres |date=27 January 2015 |volume=120 |issue=2 |pages=480–494 |doi=10.1002/2014JD022576 |doi-access=free |hdl=10161/9564 |hdl-access=free }}</ref> Their relative frequency can affect global temperature trends on a decadal timescale.<ref>{{cite journal |last1=Trenberth |first1=Kevin E. |last2=Fasullo |first2=John T. |title=An apparent hiatus in global warming? |journal=Earth's Future |date=December 2013 |volume=1 |issue=1 |pages=19–32 |doi=10.1002/2013EF000165 |bibcode=2013EaFut...1...19T |doi-access=free }}</ref> Other changes are caused by an ] from ].<ref>{{Harvnb|National Research Council|2012|p=9}}</ref> Examples of these include changes in the concentrations of ]es, ], ] eruptions, and ] around the Sun.<ref>{{Harvnb|IPCC AR5 WG1 Ch10|2013|p=916}}.</ref>
	Positive feedback due to release of CO<sub>2</sub> and CH<sub>4</sub> from thawing permafrost is an additional mechanism contributing to warming. Possible positive feedback due to CH<sub>4</sub> release from melting seabed ices is a further mechanism to be considered.
			To determine the human contribution to climate change, unique "fingerprints" for all potential causes are developed and compared with both observed patterns and known internal ].<ref>{{harvnb|Knutson|2017|p=443}}; {{Harvnb|IPCC AR5 WG1 Ch10|2013|pp=875–876}}</ref> For example, solar forcing—whose fingerprint involves warming the entire atmosphere—is ruled out because only the lower atmosphere has warmed.<ref name="USGCRP-2009" /> Atmospheric aerosols produce a smaller, cooling effect. Other drivers, such as changes in ], are less impactful.<ref>{{harvnb|IPCC AR6 WG1 Summary for Policymakers|2021|p=7}}</ref>
	===Solar variation===
	{{main|Solar variation}}
	]
	Variations in ], possibly amplified by cloud feedbacks, may have contributed to recent warming.<ref>{{cite journal | first=Nigel | last=Marsh | coauthors=Henrik, Svensmark | title=Cosmic Rays, Clouds, and Climate | journal=Space Science Reviews | volume=94 | number=1-2 | pages=215-230 | year=2000 | month=November | url=http://www.dsri.dk/~hsv/SSR_Paper.pdf | format=] | doi=10.1023/A:1026723423896 | accessdate=2007-04-17}}</ref> A difference between this mechanism and greenhouse warming is that an increase in solar activity should produce a warming of the ] while greenhouse warming should produce a cooling of the stratosphere. Stratospheric warming has not been observed.<ref>{{cite journal |last= Haigh |first= Joanna D. |date= ] |title= The effects of solar variability on the Earth's climate |journal= ] |volume= 361 |issue= 1802 |pages= 91–111 |doi= 10.1098/rsta.2002.1111 |url= http://www.journals.royalsoc.ac.uk/(cghx1ximmfbgk355ujoqcj55)/app/home/contribution.asp?referrer=parent&backto=issue,13,26;journal,53,151;linkingpublicationresults,1:102021,1 |accessdate= 2007-03-15 }}</ref>
			=== Greenhouse gases ===
	Other phenomena such as ] combined with ]es have probably had a warming effect from pre-industrial times to 1950, but a cooling effect since 1950.<ref name=grida7/> However, some research has suggested that the Sun's contribution may have been underestimated. Researchers at ] have estimated that the Sun may have minimally contributed about 10–30% of the global surface temperature warming over the period 1980–2002.<ref>{{cite journal | first=Nicola | last=Scafetta | coauthors=West, Bruce J. | title=Estimated solar contribution to the global surface warming using the ACRIM TSI satellite composite | url = http://www.fel.duke.edu/~scafetta/pdf/2005GL023849.pdf | format = ] | date=] | journal=] | volume=32 | doi=10.1029/2005GL023849}}</ref> Similarly, Stott ''et al.'' estimate in 2003 that climate models overestimate the relative effect of greenhouse gases compared to solar forcing but also that the cooling effect of volcanic dust and sulfate aerosols has been underestimated.<ref>{{Cite journal | first=Peter A. | last=Stott | coauthors=''et al.'' | title=Do Models Underestimate the Solar Contribution to Recent Climate Change? | date=] | journal=] | volume=16 | issue=24 | pages=4079–4093 | doi=10.1175/1520-0442(2003)016%3C4079:DMUTSC%3E2.0.CO;2 | accessdate=2007-04-16 | url=http://climate.envsci.rutgers.edu/pdf/StottEtAl.pdf}}</ref> They conclude that even with an enhanced climate sensitivity to solar forcing, most of the warming during the latest decades is attributable to the increases in greenhouse gases.
			{{Main|Greenhouse gas|Greenhouse gas emissions|Greenhouse effect|Carbon dioxide in Earth's atmosphere}}]
			Greenhouse gases are transparent to ], and thus allow it to pass through the atmosphere to heat the Earth's surface. The Earth ], and greenhouse gases absorb a portion of it. This absorption slows the rate at which heat escapes into space, trapping heat near the Earth's surface and warming it over time.<ref>{{cite web|title=The Causes of Climate Change|author=NASA |url=https://climate.nasa.gov/causes|website=Climate Change: Vital Signs of the Planet|access-date=8 May 2019|archive-url=https://web.archive.org/web/20190508000022/https://climate.nasa.gov/causes/|archive-date=8 May 2019|url-status=live}}</ref>
			While ] (≈50%) and clouds (≈25%) are the biggest contributors to the greenhouse effect, they primarily change as a function of temperature and are therefore mostly considered to be ] that change ]. On the other hand, concentrations of gases such as {{CO2}} (≈20%), ],<ref>Ozone acts as a greenhouse gas in the lowest layer of the atmosphere, the ] (as opposed to the stratospheric ]). {{harvnb|Wang|Shugart|Lerdau|2017}}</ref> ] and ] are added or removed independently from temperature, and are therefore considered to be ] that change global temperatures.<ref>{{harvnb|Schmidt|Ruedy|Miller|Lacis|2010}}; {{harvnb|USGCRP Climate Science Supplement|2014|p=742}}</ref>
	==History==
	{{main|Temperature record}}
	]
			Before the ], naturally-occurring amounts of greenhouse gases caused the air near the surface to be about 33&nbsp;°C warmer than it would have been in their absence.<ref>{{Harvnb|IPCC AR4 WG1 Ch1|2007|loc=FAQ1.1}}: "To emit 240 W m<sup>−2</sup>, a surface would have to have a temperature of around −19&nbsp;°C. This is much colder than the conditions that actually exist at the Earth's surface (the global mean surface temperature is about 14&nbsp;°C).</ref><ref>{{cite web|title=What Is the Greenhouse Effect?|author=ACS|author-link=American Chemical Society|url=https://www.acs.org/content/acs/en/climatescience/climatesciencenarratives/what-is-the-greenhouse-effect.html|access-date=26 May 2019|archive-url=https://web.archive.org/web/20190526110653/https://www.acs.org/content/acs/en/climatescience/climatesciencenarratives/what-is-the-greenhouse-effect.html|archive-date=26 May 2019|url-status=live}}</ref> Human activity since the Industrial Revolution, mainly extracting and burning fossil fuels (], ], and ]),<ref>{{Harvnb|The Guardian, 19 February|2020}}.</ref> has increased the amount of greenhouse gases in the atmosphere. In 2022, the ] and methane had increased by about 50% and 164%, respectively, since 1750.<ref>{{Harvnb|WMO|2024a|p=2}}.</ref> These {{CO2}} levels are higher than they have been at any time during the last 14 million years.{{sfn|The Cenozoic CO2 Proxy Integration Project (CenCOPIP) Consortium|2023}} ] are far higher than they were over the last 800,000 years.{{Sfn|IPCC AR6 WG1 Technical Summary|2021|p=TS-35}}
	===From the present to the dawn of human settlement===
	Global temperatures on both land and sea have increased by {{nowrap|0.75&nbsp;°C (1.4 °F)}} relative to the period 1860&ndash;1900, according to the ]. This measured temperature increase is not significantly affected by the ]. Since 1979, land temperatures have increased about twice as fast as ocean temperatures (0.25&nbsp;°C per decade against 0.13&nbsp;°C per decade).<ref>{{cite journal| last = Smith | first = Thomas M. | coauthors= Reynolds, Richard W. | title = A Global Merged Land–Air–Sea Surface Temperature Reconstruction Based on Historical Observations (1880–1997) | journal = ] |volume = 18 |issue = 12 | issn = 0894-8755 | pages = 2021-2036 | url = http://www.ncdc.noaa.gov/oa/climate/research/Smith-Reynolds-dataset-2005.pdf | format = ] | date = ] | accessdate = 2007-03-14}}</ref> Temperatures in the lower ] have increased between 0.12 and 0.22&nbsp;°C (0.22 and 0.4&nbsp;°F) per decade since 1979, according to ]. ] is believed to have been relatively stable over the one or two thousand years before 1850, with possibly regional fluctuations such as the ] or the ].
			] shows how additions to {{CO2}} since 1880 have been caused by different sources ramping up one after another.]]
	Based on estimates by ]'s ], 2005 was the warmest year since reliable, widespread instrumental measurements became available in the late 1800s, exceeding the previous record set in 1998 by a few hundredths of a degree.<ref>{{cite web |url= http://data.giss.nasa.gov/gistemp/2005/ |last= Hansen | first = James E. |authorlink= James Hansen |coauthors= ''et al.'' |title= Goddard Institute for Space Studies, GISS Surface Temperature Analysis |accessdate=2007-01-17 |date= ] |publisher= NASA ]}}</ref> Estimates prepared by the ] and the ] concluded that 2005 was the second warmest year, behind 1998.<ref>{{cite web |url= http://www.cru.uea.ac.uk/cru/press/2005-12-WMO.pdf |title= Global Temperature for 2005: second warmest year on record |accessdate=2007-04-13 |date= ] |publisher= ], School of Environmental Sciences, University of East Anglia |format = ]}}</ref><ref>{{cite web |url=http://grdc.bafg.de/servlet/is/4226/Pressemitteilung-WMO-23-Dez-05-743_E1.pdf |format=] |title=WMO STATEMENT ON THE STATUS OF THE GLOBAL CLIMATE IN 2005 |accessdate=2007-04-13 |date=] |publisher=]}}</ref>
			Global human-caused greenhouse gas emissions in 2019 were ] 59&nbsp;billion tonnes of {{CO2}}. Of these emissions, 75% was {{CO2}}, 18% was ], 4% was nitrous oxide, and 2% was ].{{sfn|IPCC AR6 WG3 Summary for Policymakers|2022|loc=Figure SPM.1}} {{CO2}} emissions primarily come from burning fossil fuels to provide energy for ], manufacturing, ], and electricity.<ref name="Our World in Data-2020"/> Additional {{CO2}} emissions come from ] and ], which include the {{CO2}} released by the chemical reactions for ], ], ], and ].<ref>{{harvnb|Olivier|Peters|2019|p=17}}</ref><ref>{{harvnb|Our World in Data, 18 September|2020}}; {{harvnb|EPA|2020}}: "Greenhouse gas emissions from industry primarily come from burning fossil fuels for energy, as well as greenhouse gas emissions from certain chemical reactions necessary to produce goods from raw materials."</ref><ref>{{cite web|title=Redox, extraction of iron and transition metals|url=https://www.bbc.co.uk/bitesize/guides/zv7f3k7/revision/2|quote=Hot air (oxygen) reacts with the coke (carbon) to produce carbon dioxide and heat energy to heat up the furnace. Removing impurities: The calcium carbonate in the limestone thermally decomposes to form calcium oxide. calcium carbonate → calcium oxide + carbon dioxide}}</ref><ref>{{harvnb|Kvande|2014}}: "Carbon dioxide gas is formed at the anode, as the carbon anode is consumed upon reaction of carbon with the oxygen ions from the alumina ({{chem2|Al2O3}}). Formation of carbon dioxide is unavoidable as long as carbon anodes are used, and it is of great concern because {{CO2}} is a greenhouse gas."</ref> Methane emissions ], manure, ], landfills, wastewater, and ], as well as ].<ref>{{harvnb|EPA|2020}}</ref><ref>{{harvnb|Global Methane Initiative|2020}}: "Estimated Global Anthropogenic Methane Emissions by Source, 2020: ] (27%), Manure Management (3%), Coal Mining (9%), ] (11%), Oil & Gas (24%), ] (7%), ] (7%)."</ref> Nitrous oxide emissions largely come from the microbial decomposition of ].<ref>{{harvnb|EPA|2019}}: "Agricultural activities, such as fertilizer use, are the primary source of {{N2O}} emissions."</ref><ref>{{harvnb|Davidson|2009}}: "2.0% of manure nitrogen and 2.5% of fertilizer nitrogen was converted to nitrous oxide between 1860 and 2005; these percentage contributions explain the entire pattern of increasing nitrous oxide concentrations over this period."</ref>
	Anthropogenic emissions of other ]s—notably sulfate ]—can exert a cooling effect by increasing the reflection of incoming sunlight. This partially accounts for the cooling seen in the temperature record in the middle of the twentieth century,<ref>{{cite web |url=http://www.grida.no/climate/ipcc_tar/wg1/462.htm |last = Mitchell |first = J. F. B. |coauthors = ''et al.'' |title = 12.4.3.3 Space-time studies |work = Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change |accessdate=2007-01-04 |date=] |publisher=]}}</ref> though the cooling may also be due in part to natural variability.
			While methane only lasts in the atmosphere for an average of 12 years,<ref>{{cite web |title=Understanding methane emissions |publisher=International Energy Agency |url=https://www.iea.org/reports/global-methane-tracker-2023/understanding-methane-emissions}}</ref> {{CO2}} lasts much longer. The Earth's surface absorbs {{CO2}} as part of the ]. While plants on land and in the ocean absorb most excess emissions of {{CO2}} every year, that {{CO2}} is returned to the atmosphere when biological matter is digested, burns, or decays.<ref name="nasacc">{{cite web|last1=Riebeek|first1=Holli|title=The Carbon Cycle|url=http://earthobservatory.nasa.gov/Features/CarbonCycle/?src=eoa-features|website=Earth Observatory|publisher=NASA|access-date=5 April 2018|date=16 June 2011|archive-url=https://web.archive.org/web/20160305010126/http://earthobservatory.nasa.gov/Features/CarbonCycle/?src=eoa-features|archive-date=5 March 2016|url-status=live}}</ref> Land-surface ] processes, such as ] in the soil and photosynthesis, remove about 29% of annual global {{CO2}} emissions.<ref>{{Harvnb|IPCC SRCCL Summary for Policymakers|2019|p=10}}</ref> The ocean has absorbed 20 to 30% of emitted {{CO2}} over the last two decades.<ref>{{harvnb|IPCC SROCC Ch5|2019|p=450}}.</ref> {{CO2}} is only removed from the atmosphere for the long term when it is stored in the Earth's crust, which is a process that can take millions of years to complete.<ref name="nasacc" />
	]
			=== Land surface changes ===
	Paleoclimatologist ] has argued that human influence on the global climate began around 8,000 years ago with the start of forest clearing to provide land for agriculture and 5,000 years ago with the start of Asian rice irrigation.<ref>{{cite journal |last=Ruddiman |first=William F. |authorlink=William Ruddiman |title=How Did Humans First Alter Global Climate? |volume=292 |issue=3 |journal=] |date=March 2005 |pages=46-53 |url=http://ccr.aos.wisc.edu/news/0305046.pdf |format=] |accessdate=2007-03-05}}</ref> Ruddiman's interpretation of the historical record, with respect to the methane data, has been disputed.<ref>{{cite journal |last=Schmidt |first=Gavin |authorlink=Gavin Schmidt |coauthors=''et al.'' |date=] |title=A note on the relationship between ice core methane concentrations and insolation |journal=] |volume=31 |issue=23 |id=L23206 |doi=10.1029/2004GL021083 |url=http://pubs.giss.nasa.gov/abstracts/2004/Schmidt_etal_2.html |accessdate=2007-03-05}}</ref>
			]
			Around 30% of Earth's land area is largely unusable for humans (]s, ]s, etc.), 26% is ]s, 10% is ] and 34% is ].<ref>{{harvnb|Ritchie|Roser|2018}}</ref> ] is the main ] contributor to global warming,<ref>{{harvnb|The Sustainability Consortium, 13 September|2018}}; {{harvnb|UN FAO|2016|p=18}}.</ref> as the destroyed trees release {{CO2}}, and are not replaced by new trees, removing that ].<ref name="IPCC SRCCL Summary for Policymakers 2019 18">{{harvnb|IPCC SRCCL Summary for Policymakers|2019|p=18}}</ref> Between 2001 and 2018, 27% of deforestation was from permanent clearing to enable ] for crops and livestock. Another 24% has been lost to temporary clearing under the ] agricultural systems. 26% was due to ] for wood and derived products, and ]s have accounted for the remaining 23%.<ref>{{harvnb|Curtis|Slay|Harris|Tyukavina|2018}}</ref> Some forests have not been fully cleared, but were already degraded by these impacts. Restoring these forests also recovers their potential as a carbon sink.<ref name="Duchelle-2022">{{Cite book |author1=Garrett, L. |author2=Lévite, H. |author3=Besacier, C. |author4=Alekseeva, N. |author5=Duchelle, M. |url=https://doi.org/10.4060/cc2510en |title=The key role of forest and landscape restoration in climate action |publisher=FAO |year=2022 |isbn=978-92-5-137044-5 |location=Rome|doi=10.4060/cc2510en }}</ref>
			Local vegetation cover impacts how much of the sunlight gets reflected back into space (]), and how much ]. For instance, the change from a dark ] to grassland makes the surface lighter, causing it to reflect more sunlight. Deforestation can also modify the release of chemical compounds that influence clouds, and by changing wind patterns.<ref name="Seymour 2019">{{harvnb|World Resources Institute, 8 December|2019}}</ref> In tropic and temperate areas the net effect is to produce significant warming, and forest restoration can make local temperatures cooler.<ref name="Duchelle-2022"/> At latitudes closer to the poles, there is a cooling effect as forest is replaced by snow-covered (and more reflective) plains.<ref name="Seymour 2019" /> Globally, these increases in surface albedo have been the dominant direct influence on temperature from land use change. Thus, land use change to date is estimated to have a slight cooling effect.<ref name="IPCC Special Report: Climate change and Land p2-54">{{Harvnb|IPCC SRCCL Ch2|2019|p=172}}: "The global biophysical cooling alone has been estimated by a larger range of climate models and is −0.10 ± 0.14&nbsp;°C; it ranges from −0.57&nbsp;°C to +0.06&nbsp;°C&nbsp;... This cooling is essentially dominated by increases in surface albedo: historical land cover changes have generally led to a dominant brightening of land."</ref>
	===Pre-human climate variations===
	{{See|Paleoclimatology}}
	{{See also|Snowball Earth}}
	Earth has experienced warming and cooling many times in the past. The recent Antarctic ] ice core spans 800,000 years, including eight glacial cycles timed by ] with ] warm periods comparable to present temperatures.<ref>{{cite journal | first=James | last=Hansen | coauthors=''et al.'' | url=http://www.pnas.org/cgi/reprint/103/39/14288.pdf | title=Global temperature change | journal=] | volume=103 | number=39 | pages=14288-14293 | date=] | format=] | accessdate=2007-04-20 | doi:10.1073/pnas.060291103}}</ref>
			=== Other factors ===
	A rapid buildup of greenhouse gases caused warming in the early ] period (about 180 million years ago), with average temperatures rising by 5&nbsp;°C (9.0&nbsp;°F). Research by the ] indicates that the warming caused the rate of rock weathering to increase by 400%. As such weathering locks away carbon in ] and ], CO<sub>2</sub> levels dropped back to normal over roughly the next 150,000 years.<ref>{{cite press release |title=The Open University Provides Answers on Global Warming |publisher=] |date=] |url=http://www3.open.ac.uk/earth-sciences/downloads/Press%20Release.pdf |format=] |accessdate=2007-03-04}}</ref><ref>{{cite journal | last = Cohen | first = Anthony S. | coauthors = ''et al.'' | year = 2004 | month = February | title = Osmium isotope evidence for the regulation of atmospheric CO<sub>2</sub> by continental weathering | journal = ] | volume = 32 | issue = 2 | pages = 157-160 | doi = 10.1130/G20158.1 | url = http://sheba.geo.vu.nl/~vonh/imagesanddata/data/Cohenetal2004.pdf | format = ] | accessdate = 2007-03-04}}</ref>
			==== Aerosols and clouds ====
			Air pollution, in the form of ] on a large scale.<ref>{{Harvnb|Haywood|2016|p=456}}; {{harvnb|McNeill|2017}}; {{harvnb|Samset|Sand|Smith|Bauer|2018}}.</ref> Aerosols scatter and absorb solar radiation. From 1961 to 1990, a gradual reduction in the amount of ] was observed. This phenomenon is popularly known as '']'',<ref>{{harvnb|IPCC AR5 WG1 Ch2|2013|p=183}}.</ref> and is primarily attributed to ] aerosols produced by the combustion of fossil fuels with heavy sulfur concentrations like ] and ].<ref name="Quaas2022" /> Smaller contributions come from ] (from combustion of fossil fuels and biomass), and from dust.<ref>{{harvnb|He|Wang|Zhou|Wild|2018}}; {{Harvnb|Storelvmo|Phillips|Lohmann|Leirvik|2016}}</ref><ref>{{Cite web |date=18 February 2021 |title=Aerosol pollution has caused decades of global dimming |url=https://news.agu.org/press-release/aerosol-pollution-caused-decades-of-global-dimming/ |website=] |access-date=18 December 2023 |archive-url=https://web.archive.org/web/20230327143716/https://news.agu.org/press-release/aerosol-pollution-caused-decades-of-global-dimming/ |archive-date=27 March 2023 }}</ref><ref>{{Cite web |last=Monroe |first=Robert |date=2023-01-20 |title=Increased Atmospheric Dust has Masked Power of Greenhouse Gases to Warm Planet {{!}} Scripps Institution of Oceanography |url=https://scripps.ucsd.edu/news/increased-atmospheric-dust-has-masked-power-greenhouse-gases-warm-planet |access-date=2024-11-08 |website=scripps.ucsd.edu |language=en}}</ref> Globally, aerosols have been declining since 1990 due to pollution controls, meaning that they no longer mask greenhouse gas warming as much.<ref>{{harvnb|Wild|Gilgen|Roesch|Ohmura|2005}}; {{Harvnb|Storelvmo|Phillips|Lohmann|Leirvik|2016}}; {{harvnb|Samset|Sand|Smith|Bauer|2018}}.</ref><ref name="Quaas2022">{{Cite journal |last1=Quaas |first1=Johannes |last2=Jia |first2=Hailing |last3=Smith |first3=Chris |last4=Albright |first4=Anna Lea |last5=Aas |first5=Wenche |last6=Bellouin |first6=Nicolas |last7=Boucher |first7=Olivier |last8=Doutriaux-Boucher |first8=Marie |last9=Forster |first9=Piers M. |last10=Grosvenor |first10=Daniel |last11=Jenkins |first11=Stuart |last12=Klimont |first12=Zbigniew |last13=Loeb |first13=Norman G. |last14=Ma |first14=Xiaoyan |last15=Naik |first15=Vaishali |last16=Paulot |first16=Fabien |last17=Stier |first17=Philip |last18=Wild |first18=Martin |last19=Myhre |first19=Gunnar |last20=Schulz |first20=Michael |date=21 September 2022 |title=Robust evidence for reversal of the trend in aerosol effective climate forcing |url=https://acp.copernicus.org/articles/22/12221/2022/ |journal=Atmospheric Chemistry and Physics |volume=22 |issue=18 |pages=12221–12239 |language=en |doi=10.5194/acp-22-12221-2022 |s2cid=252446168 |hdl=20.500.11850/572791 |hdl-access=free |doi-access=free |bibcode=2022ACP....2212221Q }}</ref>
			Aerosols also have indirect effects on the ]. Sulfate aerosols act as ] and lead to clouds that have more and smaller cloud droplets. These clouds reflect solar radiation more efficiently than clouds with fewer and larger droplets.<ref>{{harvnb|Twomey|1977}}.</ref> They also reduce the ], which makes clouds more reflective to incoming sunlight.<ref>{{harvnb|Albrecht|1989}}.</ref> Indirect effects of aerosols are the largest uncertainty in ].<ref name=USGCRP_2017_ch2/>
	Sudden releases of methane from ]s (the ]) have been hypothesized as a cause for other warming events in the distant past, including the ] (about 251 million years ago) and the ] (about 55 million years ago).
			While aerosols typically limit global warming by reflecting sunlight, ] in ] that falls on snow or ice can contribute to global warming. Not only does this increase the absorption of sunlight, it also increases melting and sea-level rise.<ref>{{harvnb|Ramanathan|Carmichael|2008}}; {{harvnb|RIVM|2016}}.</ref> Limiting new black carbon deposits in the Arctic could reduce global warming by 0.2&nbsp;°C by 2050.<ref>{{harvnb|Sand|Berntsen|von Salzen|Flanner|2015}}</ref> The effect of decreasing sulfur content of fuel oil for ships since 2020<ref>{{Cite web|url=https://www.imo.org/en/MediaCentre/HotTopics/Pages/Sulphur-2020.aspx|title=IMO 2020 – cutting sulphur oxide emissions|website=imo.org}}</ref> is estimated to cause an additional 0.05&nbsp;°C increase in global mean temperature by 2050.<ref>{{harvnb|Carbon Brief, 3 July|2023}}</ref>
	==Climate models==
	{{main|Global climate model}}
	]s under the ] A2 emissions scenario, which assumes no action is taken to reduce emissions.]]
	] climate model if a business as usual scenario is assumed for economic growth and greenhouse gas emissions. In this figure, the globally averaged warming corresponds to 3.0&nbsp;°C (5.4&nbsp;°F)]]
			==== Solar and volcanic activity ====
	Scientists have studied global warming with computer models of the climate. These models are based on physical principles of fluid dynamics, radiative transfer, and other processes, with some simplifications being necessary because of limitations in computer power. These models predict that the net effect of adding greenhouse gases is to produce a warmer climate. However, even when the same assumptions of fossil fuel consumption and CO<sub>2</sub> emission are used, the amount of projected warming varies between models and there still remains a considerable range of ].
			{{Further|Solar activity and climate}}
			] ("NCA4", USGCRP, 2017) includes charts illustrating that neither solar nor volcanic activity can explain the observed warming.<ref>{{cite journal |title=Climate Science Special Report: Fourth National Climate Assessment, Volume I - Chapter 3: Detection and Attribution of Climate Change |url=https://science2017.globalchange.gov/chapter/3/ |website=science2017.globalchange.gov |publisher=U.S. Global Change Research Program (USGCRP) |archive-url=https://web.archive.org/web/20190923190450/https://science2017.globalchange.gov/chapter/3/ |archive-date=23 September 2019 |year=2017 |pages=1–470 |url-status=live}} Adapted directly from Fig. 3.3.</ref><ref>{{cite journal |last1=Wuebbles |first1=D. J. |last2=Fahey |first2=D. W. |last3=Hibbard |first3=K. A. |last4=Deangelo |first4=B. |last5=Doherty |first5=S. |last6=Hayhoe |first6=K. |last7=Horton |first7=R. |last8=Kossin |first8=J. P. |last9=Taylor |first9=P. C. |last10=Waple |first10=A. M. |last11=Yohe |first11=C. P. |date=23 November 2018 |title=Climate Science Special Report / Fourth National Climate Assessment (NCA4), Volume I /Executive Summary / Highlights of the Findings of the U.S. Global Change Research Program Climate Science Special Report |url=https://science2017.globalchange.gov/chapter/executive-summary/ |url-status=live |publisher=U.S. Global Change Research Program |pages=1–470 |doi=10.7930/J0DJ5CTG |archive-url=https://web.archive.org/web/20190614150544/https://science2017.globalchange.gov/chapter/executive-summary/ |archive-date=14 June 2019 |doi-access=free |website=globalchange.gov}}</ref>]]
			As the Sun is the Earth's primary energy source, changes in incoming sunlight directly affect the ].<ref name=USGCRP_2017_ch2>{{harvnb|USGCRP Chapter 2|2017|p=78}}.</ref> ] has been measured directly by ]s,<ref>{{Harvnb|National Academies|2008|p=6}}</ref> and indirect measurements are available from the early 1600s onwards.<ref name=USGCRP_2017_ch2 /> Since 1880, there has been no upward trend in the amount of the Sun's energy reaching the Earth, in contrast to the warming of the lower atmosphere (the ]).<ref>{{cite web|title=Is the Sun causing global warming?|website=Climate Change: Vital Signs of the Planet|url=https://climate.nasa.gov/faq/14/is-the-sun-causing-global-warming|access-date=10 May 2019|archive-url=https://web.archive.org/web/20190505160051/https://climate.nasa.gov/faq/14/is-the-sun-causing-global-warming/|archive-date=5 May 2019|url-status=live}}</ref> The upper atmosphere (the ]) would also be warming if the Sun was sending more energy to Earth, but instead, it has been cooling.<ref name="USGCRP-2009">{{Harvnb|USGCRP|2009|p=20}}.</ref>
			This is consistent with greenhouse gases preventing heat from leaving the Earth's atmosphere.<ref>{{Harvnb|IPCC AR4 WG1 Ch9|2007|pp=702–703}}; {{harvnb|Randel|Shine|Austin|Barnett|2009}}.</ref>
			] can release gases, dust and ash that partially block sunlight and reduce temperatures, or they can send water vapour into the atmosphere, which adds to greenhouse gases and increases temperatures.<ref>{{cite web |url=https://climate.nasa.gov/news/3204/tonga-eruption-blasted-unprecedented-amount-of-water-into-stratosphere/ |title=Tonga eruption blasted unprecedented amount of water into stratosphere |last=Greicius |first=Tony |date=2 August 2022 |website=NASA Global Climate Change |access-date=18 January 2024 |quote=Massive volcanic eruptions like Krakatoa and Mount Pinatubo typically cool Earth's surface by ejecting gases, dust, and ash that reflect sunlight back into space. In contrast, the Tonga volcano didn't inject large amounts of aerosols into the stratosphere, and the huge amounts of water vapor from the eruption may have a small, temporary warming effect, since water vapor traps heat. The effect would dissipate when the extra water vapor cycles out of the stratosphere and would not be enough to noticeably exacerbate climate change effects.}}</ref> These impacts on temperature only last for several years, because both water vapour and volcanic material have low persistence in the atmosphere.<ref name="USGCRP Chapter 2 2017 79">{{harvnb|USGCRP Chapter 2|2017|p=79}}</ref> ] are more persistent, but they are equivalent to less than 1% of current human-caused {{CO2}} emissions.{{sfn|Fischer|Aiuppa|2020}} Volcanic activity still represents the single largest natural impact (forcing) on temperature in the industrial era. Yet, like the other natural forcings, it has had negligible impacts on global temperature trends since the Industrial Revolution.<ref name="USGCRP Chapter 2 2017 79"/>
	Including uncertainties in the models and in future greenhouse gas concentrations, the IPCC anticipates a warming of {{nowrap|1.1 °C to 6.4 °C}} {{nowrap|(2.0 °F to 11.5 °F)}} between 1990 and 2100. Models have also been used to help investigate the ] by comparing the observed changes to those that the models project from various natural and human derived causes.
			==== Climate change feedbacks ====
	Climate models can produce a good match to observations of global temperature changes over the last century, but "cannot yet simulate all aspects of climate."<ref>{{cite web |url=http://www.grida.no/climate/ipcc_tar/wg1/007.htm |title=Summary for Policymakers |work=Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change |accessdate=2007-04-28 |date=] |publisher=]}}</ref> These models do not unambiguously attribute the warming that occurred from approximately 1910 to 1945 to either natural variation or human effects; however, they suggest that the warming since 1975 is dominated by man-made ] emissions.
			{{Main|Climate change feedbacks|Climate sensitivity}}
			].<ref>{{cite web |url=https://nsidc.org/cryosphere/seaice/processes/albedo.html |title=Thermodynamics: Albedo |work=NSIDC |access-date=10 October 2017|archive-url=https://web.archive.org/web/20171011021602/https://nsidc.org/cryosphere/seaice/processes/albedo.html |archive-date=11 October 2017 |url-status=live }}</ref>]]
			The climate system's response to an initial forcing is shaped by feedbacks, which either amplify or dampen the change. '']'' or ''positive'' feedbacks increase the response, while '']'' or ''negative'' feedbacks reduce it.<ref>{{cite web |title=The study of Earth as an integrated system |publisher=Earth Science Communications Team at NASA's Jet Propulsion Laboratory / California Institute of Technology |year=2013 |series=Vitals Signs of the Planet |archive-url=https://web.archive.org/web/20190226190002/https://climate.nasa.gov/nasa_science/science/ |archive-date=26 February 2019 |url=https://climate.nasa.gov/nasa_science/science/ |url-status=live}}</ref> The main reinforcing feedbacks are the ], the ], and the net effect of clouds.{{sfn|USGCRP Chapter 2|2017|pp=89–91}}<ref>{{harvnb|IPCC AR6 WG1 Technical Summary|2021|p=58}}: "The net effect of changes in clouds in response to global warming is to amplify human-induced warming, that is, the net cloud feedback is positive (high confidence)"</ref> The primary balancing mechanism is ], as Earth's surface gives off more ] to space in response to rising temperature.{{sfn|USGCRP Chapter 2|2017|pp=89–90}} In addition to temperature feedbacks, there are feedbacks in the carbon cycle, such as the fertilizing effect of {{CO2}} on plant growth.<ref>{{harvnb|IPCC AR5 WG1|2013|p=14}}</ref> Feedbacks are expected to trend in a positive direction as greenhouse gas emissions continue, raising climate sensitivity.<ref>{{harvnb|IPCC AR6 WG1 Technical Summary|2021|p=93}}: "Feedback processes are expected to become more positive overall (more amplifying of global surface temperature changes) on multi-decadal time scales as the spatial pattern of surface warming evolves and global surface temperature increases."</ref>
	Most global climate models, when run to project future climate, are forced by imposed greenhouse gas scenarios, generally one from the IPCC ] (SRES). Less commonly, models may be run by adding a simulation of the ]; this generally shows a positive feedback, though this response is uncertain (under the A2 SRES scenario, responses vary between an extra 20 and 200&nbsp;ppm of CO<sub>2</sub>). Some observational studies also show a positive feedback.<ref>
	{{cite journal |last=Torn |first=Margaret |coauthors=Harte, John |date=] |title=Missing feedbacks, asymmetric uncertainties, and the underestimation of future warming |journal=Geophysical Research Letters |volume=33 |issue=10 |id=L10703 |url=http://www.agu.org/pubs/crossref/2006/2005GL025540.shtml |accessdate=2007-03-04}}</ref><ref>
	{{cite journal |last=Harte |first=John |coauthors=Saleska, Scott and Shih, Tiffany |date=] |title=Shifts in plant dominance control carbon-cycle responses to experimental warming and widespread drought |journal=Environmental Research Letters |volume=1 |issue=1 |id=014001 |url=http://www.iop.org/EJ/article/1748-9326/1/1/014001/erl6_1_014001.html |accessdate=2007-05-02}}</ref>
	<ref>{{cite journal
	|last = Scheffer
	|first = M.
	|coauthors = V. Brovkin, P. Cox
	|title = Positive feedback between global warming and atmospheric CO2 concentration inferred from past climate change.
	|journal = Geophysical Research Letters
	|volume = 33
	|url = http://www.pik-potsdam.de/~victor/recent/scheffer_etal_T_CO2_GRL_in_press.pdf
	|doi = 10.1029/2005gl025044
	|year = 2006}}</ref>
			These feedback processes alter the pace of global warming. For instance, warmer air ] in the form of ], which is itself a potent greenhouse gas.{{sfn|USGCRP Chapter 2|2017|pp=89–91}} Warmer air can also make clouds higher and thinner, and therefore more insulating, increasing climate warming.{{sfn|Williams|Ceppi|Katavouta|2020}} The reduction of snow cover and sea ice in the Arctic is another major feedback, this reduces the reflectivity of the Earth's surface in the region and ].<ref>{{harvnb|NASA, 28 May|2013}}.</ref><ref>{{harvnb|Cohen|Screen|Furtado|Barlow|2014}}.</ref> This additional warming also contributes to ] thawing, which releases methane and {{CO2}} into the atmosphere.<ref name="Turetsky 2019">{{harvnb|Turetsky|Abbott|Jones|Anthony|2019}}</ref>
	The representation of clouds is one of the main sources of uncertainty in present-generation models, though progress is being made on this problem.<ref>{{cite web |url=http://www.grida.no/climate/ipcc_tar/wg1/271.htm |last = Stocker |first = Thomas F. |coauthors = ''et al.'' |title = 7.2.2 Cloud Processes and Feedbacks |work = Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change |accessdate=2007-03-04 |date=] |publisher=]}}</ref> There is also an ongoing discussion as to whether climate models are neglecting important indirect and feedback effects of ].
			Around half of human-caused {{CO2}} emissions have been absorbed by land plants and by the oceans.<ref>{{harvnb|Climate.gov, 23 June|2022}}: "Carbon cycle experts estimate that natural "sinks"—processes that remove carbon from the atmosphere—on land and in the ocean absorbed the equivalent of about half of the carbon dioxide we emitted each year in the 2011–2020 decade."</ref> This fraction is not static and if future {{CO2}} emissions decrease, the Earth will be able to absorb up to around 70%. If they increase substantially, it'll still absorb more carbon than now, but the overall fraction will decrease to below 40%.<ref>{{harvnb|IPCC AR6 WG1 Technical Summary|2021|p=TS-122|loc=Box TS.5, Figure 1}}</ref> This is because climate change increases droughts and heat waves that eventually inhibit plant growth on land, and soils will release more carbon from dead plants ].<ref>{{harvnb|Melillo|Frey|DeAngelis|Werner|2017}}: Our first-order estimate of a warming-induced loss of 190 Pg of soil carbon over the 21st century is equivalent to the past two decades of carbon emissions from fossil fuel burning.</ref><ref>{{harvnb|IPCC SRCCL Ch2|2019|pp=133, 144}}.</ref> The rate at which oceans absorb atmospheric carbon will be lowered as they become more acidic and experience changes in ] and ] distribution.{{sfn|USGCRP Chapter 2|2017|pp=93–95}}<ref name="Liu2022">{{cite journal |last1=Liu |first1=Y. |last2=Moore |first2=J. K. |last3=Primeau |first3=F. |last4=Wang |first4=W. L. |date=22 December 2022 |title=Reduced CO2 uptake and growing nutrient sequestration from slowing overturning circulation |journal=Nature Climate Change |volume=13 |pages=83–90 |doi=10.1038/s41558-022-01555-7 |osti=2242376 |s2cid=255028552 }}</ref><ref name="PearceYale3602023"/> Uncertainty over feedbacks, particularly cloud cover,<ref>{{harvnb|IPCC AR6 WG1 Technical Summary|2021|pp=58, 59}}: "Clouds remain the largest contribution to overall uncertainty in climate feedbacks."</ref> is the major reason why different climate models project different magnitudes of warming for a given amount of emissions.<ref>{{harvnb|Wolff|Shepherd|Shuckburgh|Watson|2015}}: "the nature and magnitude of these feedbacks are the principal cause of uncertainty in the response of Earth's climate (over multi-decadal and longer periods) to a particular emissions scenario or greenhouse gas concentration pathway."</ref>
	==Attributed and expected effects==
	{{main|Effects of global warming}}
	] and the ]. The increased downward trend in the late 1980s is symptomatic of the increased rate and number of retreating glaciers.]]
			== Modelling ==
	Some effects on both the ] and ] are, at least in part, already being attributed to global warming. A 2001 report by the IPCC suggests that ], ] such as the ], ], changes in rainfall patterns, increased intensity and frequency of ], are being attributed in part to global warming.<ref name="tar_wg2">{{cite web |title = Climate Change 2001: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Third Assessment Report of the Intergovernmental Panel on Climate Change |url = http://www.grida.no/climate/ipcc_tar/wg2/index.htm |publisher = ] |date = ] |accessdate = 2007-03-14}}</ref> While changes are expected for overall patterns, intensity, and frequencies, it is difficult to attribute specific events to global warming. Other expected effects include water scarcity in some regions and increased precipitation in others, changes in mountain snowpack, adverse health effects from warmer temperatures, and the spread of disease.
			{{Further|Climate model|Climate change scenario}}
			] that heats the planet up.]]
			A ] is a representation of the physical, chemical and biological processes that affect the climate system.<ref>{{Harvnb|IPCC AR5 SYR Glossary|2014|p=120}}.</ref> Models include natural processes like changes in the Earth's orbit, historical changes in the Sun's activity, and volcanic forcing.<ref>{{harvnb|Carbon Brief, 15 January|2018|loc=}}</ref> Models are used to estimate the degree of warming future emissions will cause when accounting for the ].<ref>{{harvnb|Wolff|Shepherd|Shuckburgh|Watson|2015}}</ref><ref>{{harvnb|Carbon Brief, 15 January|2018|loc=}}</ref> Models also predict the circulation of the oceans, the annual cycle of the seasons, and the flows of carbon between the land surface and the atmosphere.<ref>{{harvnb|Carbon Brief, 15 January|2018|loc=}}</ref>
			The physical realism of models is tested by examining their ability to simulate current or past climates.<ref>{{Harvnb|IPCC AR4 WG1 Ch8|2007}}, FAQ 8.1.</ref> Past models have underestimated the rate of ]<ref>{{harvnb|Stroeve|Holland|Meier|Scambos|2007}}; {{harvnb|National Geographic, 13 August|2019}}</ref> and underestimated the rate of precipitation increase.<ref>{{harvnb|Liepert|Previdi|2009}}.</ref> Sea level rise since 1990 was underestimated in older models, but more recent models agree well with observations.<ref>{{harvnb|Rahmstorf|Cazenave|Church|Hansen|2007}}; {{harvnb|Mitchum|Masters|Hamlington|Fasullo|2018}}</ref> The 2017 United States-published ] notes that "climate models may still be underestimating or missing relevant feedback processes".<ref>{{harvnb|USGCRP Chapter 15|2017}}.</ref> Additionally, climate models may be unable to adequately predict short-term regional climatic shifts.<ref>{{cite journal |last1=Hébert |first1=R. |last2=Herzschuh |first2=U. |last3=Laepple |first3=T. |date=31 October 2022 |title=Millennial-scale climate variability over land overprinted by ocean temperature fluctuations |journal=] |volume=15 |issue=1 |pages=899–905 |doi=10.1038/s41561-022-01056-4 |pmid=36817575 |pmc=7614181 |bibcode=2022NatGe..15..899H }}</ref>
	Increasing deaths, displacements, and economic losses projected due to ] attributed to global warming may be exacerbated by growing population densities in affected areas.<ref name="WGII SPM AR4">{{cite web |title = Summary for Policymakers |work = Climate Change 2007: Impacts, Adaptation and Vulnerability. Working Group II Contribution to the Intergovernmental Panel on Climate Change Fourth Assessment Report |url = http://www.ipcc.ch/SPM13apr07.pdf |format = ] |publisher = ] |date = ] |accessdate = 2007-04-28}}</ref> A summary of probable effects and recent understanding can be found in the report made for the ] by Working Group II;<ref name="tar_wg2"/> the newer ] summary reports, "There is observational evidence for an increase of intense ] activity in the ] since about 1970, correlated with increases of tropical sea surface temperatures. There are also suggestions of increased intense tropical cyclone activity in some other regions where concerns over data quality are greater. Multi-decadal variability and the quality of the tropical cyclone records prior to routine satellite observations in about 1970 complicate the detection of long-term trends in tropical cyclone activity. There is no clear trend in the annual numbers of tropical cyclones."<ref name=grida7/>
			A ] add societal factors to a physical climate model. These models simulate how population, ], and energy use affect—and interact with—the physical climate. With this information, these models can produce scenarios of future greenhouse gas emissions. This is then used as input for physical climate models and carbon cycle models to predict how atmospheric concentrations of greenhouse gases might change.<ref>{{harvnb|Carbon Brief, 15 January|2018|loc=}}</ref><ref>{{harvnb|Matthews|Gillett|Stott|Zickfeld|2009}}</ref> Depending on the ] and the mitigation scenario, models produce atmospheric {{CO2}} concentrations that range widely between 380 and 1400 ppm.<ref>{{harvnb|Carbon Brief, 19 April|2018}}; {{harvnb|Meinshausen|2019|p=462}}.</ref>
	Additional anticipated effects include sea level rise of {{nowrap|110 to 770 mm}} {{nowrap|(0.36 to 2.5 feet)}} between 1990 and 2100,<ref>{{cite web |url=http://www.grida.no/climate/ipcc_tar/wg1/409.htm |last = Church |first = John A. |coauthors = ''et al.'' |title = Executive Summary of Chapter 11 |work = Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change |accessdate=2005-12-19 |date=] |publisher=]}}</ref> ], ], reductions in the ], increased intensity and frequency of ], ] of ocean ], and the spread of diseases such as ]{{citation needed}} and ].<ref>{{cite journal |title = Potential effect of population and climate changes on global distribution of dengue fever: an empirical model |url = http://image.thelancet.com/extras/01art11175web.pdf |format = ] |journal = The Lancet |last = Hales |first = Simon |coauthors = ''et al.'' |volume = 360 |issue = 9336 |pages = 830-834 |date= ] |accessdate=2007-05-02}}</ref> One study predicts 18% to 35% of a sample of 1,103 animal and plant species would be ] by 2050, based on future climate projections.<ref>{{cite journal |last= Thomas |first= Chris D. |coauthors= ''et al.'' |date= ] |title= Extinction risk from climate change |journal= ] |volume= 427 |issue= 6970 |pages= 145-138 |doi= 10.1038/nature02121 |url= http://www.geog.umd.edu/resac/outgoing/GEOG442%20Fall%202005/Lecture%20materials/extinctions%20and%20climate%20change.pdf |format= ] |accessdate= 2007-03-18}}</ref> Mechanistic studies have documented extinctions due to recent climate change: McLaughlin ''et al.'' documented two populations of ] being threatened by precipitation change.<ref name="McLaughlin">{{cite journal |last= McLaughlin |first= John F. |coauthors= ''et al.'' |date= ] |title= Climate change hastens population extinctions |journal= ] |volume= 99 |issue= 9 |pages= 6070-6074 |doi= 10.1073/pnas.052131199 |url= http://www.nd.edu/~hellmann/pnas.pdf |format= ] |accessdate= 2007-03-29}}</ref> Parmesan states, "Few studies have been conducted at a scale that encompasses an entire species"<ref>{{cite journal |last= Permesan |first= Camille |date= ] |title= Ecological and Evolutionary Responses to Recent Climate Change |journal= ] |volume= 37 |pages= 637-669 |doi= 10.1146/annurev.ecolsys.37.091305.110100 |url= http://cns.utexas.edu/communications/File/AnnRev_CCimpacts2006.pdf |format= ] |accessdate= 2007-03-30}}</ref> and McLaughlin ''et al.'' agreed "few mechanistic studies have linked extinctions to recent climate change."<ref name="McLaughlin"/>
	===Economics===		== Impacts ==
	{{main|Economics of global warming}}		{{Main|Effects of climate change}}
	Some economists have tried to estimate the aggregate net economic costs of damages from climate change across the globe. Such estimates have so far failed to reach conclusive findings; in a survey of 100 estimates, the values ran from ]-10 per tonne of carbon (tC) (US$-3 per tonne of carbon dioxide) up to US$350/tC (US$95 per tonne of carbon dioxide), with a mean of US$43 per tonne of carbon (US$12 per tonne of carbon dioxide).<ref name="WGII SPM AR4"/> One widely-publicized report on potential economic impact is the ]; it suggests that extreme weather might reduce global ] by up to 1%, and that in a worst case scenario global consumption per head could fall 20%.<ref>{{cite web | url= http://news.bbc.co.uk/2/hi/business/6098362.stm | title = At-a-glance: The Stern Review | publisher = ] |accessdate=2007-04-29 |date = ]}}</ref> The reports methodology, advocacy and conclusions has been criticized by many economists, while others have supported the general attempt to quantify economic risk, even if not the specific numbers.
			]s from the 1850 to 1900 baseline.]]
	In a summary of economic cost associated with climate change, the ] emphasizes the risks to ], ], and ] of increasingly traumatic and costly weather events.<ref name=UNEPRisk>{{cite web | url=http://www.unepfi.org/fileadmin/documents/CEO_briefing_climate_change_2002_en.pdf | format= ] | title = Climate Risk to Global Economy |last = Dlugolecki |first= Andrew |coauthors= ''et al.'' |work = CEO Briefing: UNEP FI Climate Change Working Group | publisher = ] |accessdate=2007-04-29 |date=2002}}</ref> Other economic sectors likely to face difficulties related to climate change include ] and transport. Developing countries, rather than the developed world, are at greatest economic risk.<ref name=UNEPRisk/>
			=== Environmental effects ===
	==Mitigation and adaptation==
			{{Further|Effects of climate change on oceans|Effects of climate change on the water cycle}}
	{{main|Mitigation of global warming|adaptation to global warming|Kyoto Protocol}}
			The environmental effects of climate change are broad and far-reaching, ], ice, and weather. Changes may occur gradually or rapidly. Evidence for these effects comes from studying climate change in the past, from modelling, and from modern observations.<ref>{{harvnb|Hansen|Sato|Hearty|Ruedy|2016}}; {{harvnb|Smithsonian, 26 June|2016}}.</ref> Since the 1950s, ]s and heat waves have appeared simultaneously with increasing frequency.<ref>{{harvnb|USGCRP Chapter 15|2017|p=415}}.</ref> Extremely wet or dry events within the ] period have increased in India and East Asia.<ref>{{harvnb|Scientific American, 29 April|2014}}; {{harvnb|Burke|Stott|2017}}.</ref> Monsoonal precipitation over the Northern Hemisphere has increased since 1980.<ref>{{Cite journal |last1=Liu |first1=Fei |last2=Wang |first2=Bin |last3=Ouyang |first3=Yu |last4=Wang |first4=Hui |last5=Qiao |first5=Shaobo |last6=Chen |first6=Guosen |last7=Dong |first7=Wenjie |date=19 April 2022 |title=Intraseasonal variability of global land monsoon precipitation and its recent trend |journal=npj Climate and Atmospheric Science |language=en |volume=5 |issue=1 |page=30 |doi=10.1038/s41612-022-00253-7 |bibcode=2022npCAS...5...30L |issn=2397-3722 |doi-access=free }}</ref> The rainfall rate and intensity of ],<ref name="USGCRP-2017">{{Harvnb|USGCRP Chapter 9|2017|p=260}}.</ref> and the geographic range likely expanding poleward in response to climate warming.<ref>{{cite journal |first1=Joshua |last1=Studholme |first2=Alexey V. |last2=Fedorov |first3=Sergey K. |last3=Gulev |first4=Kerry |last4=Emanuel |first5=Kevin |last5=Hodges |url=https://www.nature.com/articles/s41561-021-00859-1 |title=Poleward expansion of tropical cyclone latitudes in warming climates |date=29 December 2021 |journal=] |volume=15 |pages=14–28 |doi=10.1038/s41561-021-00859-1 |s2cid=245540084}}</ref> Frequency of tropical cyclones has not increased as a result of climate change.<ref>{{cite web |title=Hurricanes and Climate Change |url=https://www.c2es.org/content/hurricanes-and-climate-change/ |website=] |date=10 July 2020}}</ref>
	The broad agreement among climate scientists that global temperatures will continue to increase has led nations, states, corporations and individuals to implement actions to try to ] or ]. Many environmental groups encourage ], often aimed at the consumer. There has been ], including efforts at increased energy efficiency and (still limited) moves to ]. One important innovation has been the development of greenhouse gas ] through which companies, in conjunction with government, agree to cap their emissions or to purchase credits from those below their allowances.
			]
	The world's primary international agreement on combating global warming is the ], an amendment to the ] (UNFCCC), negotiated in 1997. The Protocol now covers more than 160 countries globally and over 55% of global greenhouse gas emissions.<ref>{{cite web | url=http://unfccc.int/files/essential_background/kyoto_protocol/application/pdf/kpstats.pdf | format=] |title=Kyoto Protocol Status of Ratification | publisher=] | date=] | accessdate=2007-04-27}}</ref> The ], the world's largest greenhouse gas emitter; ]; and ] have refused to ratify the treaty. ] and ], two other large emitters, have ratified the treaty but, as developing countries, are exempt from its provisions.
			Global sea level is rising as a consequence of ] and ] and ]. Sea level rise has increased over time, reaching 4.8&nbsp;cm per decade between 2014 and 2023.<ref>{{harvnb|WMO|2024a|p=6}}.</ref> Over the 21st century, the IPCC projects 32–62&nbsp;cm of sea level rise under a low emission scenario, 44–76&nbsp;cm under an intermediate one and 65–101&nbsp;cm under a very high emission scenario.<ref>{{harvnb|IPCC AR6 WG2|2022|p=1302}}</ref> ] processes in Antarctica may add substantially to these values,<ref>{{harvnb|DeConto|Pollard|2016}}</ref> including the possibility of a 2-meter sea level rise by 2100 under high emissions.{{sfn|Bamber|Oppenheimer|Kopp|Aspinall|2019}}
			Climate change has led to decades of ].<ref>{{harvnb|Zhang|Lindsay|Steele|Schweiger|2008}}</ref> While ice-free summers are expected to be rare at 1.5&nbsp;°C degrees of warming, they are set to occur once every three to ten years at a warming level of 2&nbsp;°C.<ref>{{harvnb|IPCC SROCC Summary for Policymakers|2019|p=18}}</ref> Higher atmospheric {{CO2}} concentrations cause more {{CO2}} to dissolve in the oceans, which is ].<ref>{{Harvnb|Doney|Fabry|Feely|Kleypas|2009}}.</ref> Because oxygen is less soluble in warmer water,<ref>{{harvnb|Deutsch|Brix|Ito|Frenzel|2011}}</ref> its concentrations in the ocean ], and ] are expanding.<ref>{{harvnb|IPCC SROCC Ch5|2019|p=510}}; {{cite web |title=Climate Change and Harmful Algal Blooms |date=5 September 2013 |url=https://www.epa.gov/nutrientpollution/climate-change-and-harmful-algal-blooms |publisher=] |access-date=11 September 2020}}</ref>
	==Controversy and politics==
	{{main|Global warming controversy|politics of global warming}}
	Increased awareness of the scientific findings surrounding global warming has resulted in political and economic debate. Poor regions, particularly ], appear at greatest risk from the suggested effects of global warming, while their actual emissions have been negligible compared to the developed world, reports '']''.<ref name>{{cite news | title= Poor Nations to Bear Brunt as World Warms | first=Andrew | last=Revkin | date=] | publisher=] | url= http://www.nytimes.com/2007/04/01/science/earth/01climate.html?ex=1333080000&en=6c687d64add0b7ba&ei=5088&partner=rssnyt&emc=rss| accessdate = 2007-05-02}}</ref> At the same time, developing world exemptions from provisions of the Kyoto treaty have been criticized by the United States and been used as part of its justification for continued non-ratification.<ref>{{cite web | title= China's emissions may surpass the US in 2007 | first=Catherine | last=Brahic | date=] | publisher=] | url=http://environment.newscientist.com/article/dn11707-chinas-emissions-to-surpass-the-us-within-months.html | accessdate = 2007-05-02}}</ref> In the ], the idea of human influence on climate and efforts to combat it has gained wider acceptance in ] than the United States.<ref>{{cite web | title=More in Europe worry about climate than in U.S., poll shows | first=Thomas | last=Crampton | date=] | publisher=] | url=http://www.iht.com/articles/2007/01/04/news/poll.php | accessdate = 2007-04-14 }}</ref><ref>{{cite web | title = Summary of Findings | work = Little Consensus on Global Warming. Partisanship Drives Opinion | publisher = ] | date=] | accessdate = 2007-04-14 | url = http://people-press.org/reports/display.php3?ReportID=280}}</ref>
			=== Tipping points and long-term impacts ===
	Fossil fuel companies such as ] have spent large sums of money for public relations to downplay the risks of climate change,<ref>{{cite news |title= Exxon cuts ties to global warming skeptics |url= http://www.msnbc.msn.com/id/16593606 |publisher= ] |date= ] |accessdate= 2007-05-02}}</ref><ref>{{cite news |title= Report: Big Money Confusing Public on Global Warming |url= http://abcnews.go.com/Technology/Business/story?id=2767979&page=1 |last= Sandell |first= Clayton |publisher= ] |date= ] |accessdate= 2007-04-27}}</ref> while environmental groups have launched campaigns emphasizing its impacts.
			] |access-date=31 January 2024 }}</ref><ref name="ArmstrongMcKay2022" />]]
			{{Main|Tipping points in the climate system}}
			Greater degrees of global warming increase the risk of passing through ']'—thresholds beyond which certain major impacts can no longer be avoided even if temperatures return to their previous state.<ref>{{Harvnb|IPCC SR15 Ch3|2018|p=283}}.</ref><ref>{{Harvnb|Carbon Brief, 10 February|2020}}</ref> For instance, the ] is already melting, but if global warming reaches levels between 1.7&nbsp;°C and 2.3&nbsp;°C, its melting will continue until it fully disappears. If the warming is later reduced to 1.5&nbsp;°C or less, it will still lose a lot more ice than if the warming was never allowed to reach the threshold in the first place.<ref name="Bochow2023">{{cite journal |last1=Bochow |first1=Nils |last2=Poltronieri |first2=Anna |last3=Robinson |first3=Alexander |last4=Montoya |first4=Marisa |last5=Rypdal |first5=Martin |last6=Boers |first6=Niklas |date=18 October 2023 |title=Overshooting the critical threshold for the Greenland ice sheet |journal=] |volume=622 |issue=7983 |pages=528–536 |bibcode=2023Natur.622..528B |doi=10.1038/s41586-023-06503-9 |pmc=10584691 |pmid=37853149}}</ref> While the ice sheets would melt over millennia, other tipping points would occur faster and give societies less time to respond. The collapse of major ]s like the ] (AMOC), and irreversible damage to key ecosystems like the ] and ] can unfold in a matter of decades.<ref name="ArmstrongMcKay2022">{{Cite journal |last1=Armstrong McKay |first1=David I. |last2=Staal |first2=Arie |last3=Abrams |first3=Jesse F. |last4=Winkelmann |first4=Ricarda |last5=Sakschewski |first5=Boris |last6=Loriani |first6=Sina |last7=Fetzer |first7=Ingo |last8=Cornell |first8=Sarah E. |last9=Rockström |first9=Johan |last10=Lenton |first10=Timothy M. |date=9 September 2022 |title=Exceeding 1.5&nbsp;°C global warming could trigger multiple climate tipping points |url=https://www.science.org/doi/10.1126/science.abn7950 |journal=] |volume=377 |issue=6611 |pages=eabn7950 |doi=10.1126/science.abn7950 |pmid=36074831 |hdl=10871/131584 |s2cid=252161375 |issn=0036-8075|hdl-access=free }}</ref>
			The long-term ] include further ice melt, ], sea level rise, ocean acidification and ocean deoxygenation.<ref>{{harvnb|IPCC AR6 WG1 Summary for Policymakers|2021|p=21}}</ref> The timescale of long-term impacts are centuries to millennia due to {{CO2}}'s long atmospheric lifetime.<ref>{{Harvnb|IPCC AR5 WG1 Ch12|2013|pp=88–89|loc=FAQ 12.3}}</ref> The result is an estimated total sea level rise of {{convert|2.3|m/°C|ft/°F}} after 2000 years.<ref>{{harvnb|Smith|Schneider|Oppenheimer|Yohe|2009}}; {{harvnb|Levermann|Clark|Marzeion|Milne|2013}}</ref> Oceanic {{CO2}} uptake is slow enough that ocean acidification will also continue for hundreds to thousands of years.{{sfn|IPCC AR5 WG1 Ch12|2013|p=1112}} Deep oceans (below {{convert|2000|m|ft}}) are also already committed to losing over 10% of their dissolved oxygen by the warming which occurred to date.<ref>{{cite journal |last1=Oschlies |first1=Andreas |title=A committed fourfold increase in ocean oxygen loss |journal=Nature Communications |date=16 April 2021 |volume=12 |issue=1 |page=2307 |doi=10.1038/s41467-021-22584-4 |pmid=33863893 |pmc=8052459 |bibcode=2021NatCo..12.2307O }}</ref> Further, the ] appears committed to practically irreversible melting, which would increase the sea levels by at least {{convert|3.3|m|ftin|abbr=on}} over approximately 2000 years.<ref name="ArmstrongMcKay2022" /><ref name="Lau2023">{{Cite journal |last1=Lau |first1=Sally C. Y. |last2=Wilson |first2=Nerida G. |last3=Golledge |first3=Nicholas R. |last4=Naish |first4=Tim R. |last5=Watts |first5=Phillip C. |last6=Silva |first6=Catarina N. S. |last7=Cooke |first7=Ira R. |last8=Allcock |first8=A. Louise |last9=Mark |first9=Felix C. |last10=Linse |first10=Katrin |date=21 December 2023 |title=Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial |url=https://epic.awi.de/id/eprint/58369/1/science.ade0664%281%29.pdf |journal=] |volume=382 |issue=6677 |pages=1384–1389 |bibcode=2023Sci...382.1384L |doi=10.1126/science.ade0664 |pmid=38127761 |s2cid=266436146}}</ref><ref name="Naughten2023">{{cite journal |last1=Naughten |first1=Kaitlin A. |last2=Holland |first2=Paul R. |last3=De Rydt |first3=Jan |date=23 October 2023 |title=Unavoidable future increase in West Antarctic ice-shelf melting over the twenty-first century |journal=] |volume=13 |issue=11 |pages=1222–1228 |bibcode=2023NatCC..13.1222N |doi=10.1038/s41558-023-01818-x |s2cid=264476246 |doi-access=free}}</ref>
	This issue has sparked debate in the U.S. about the benefits of reducing ] emissions of ]es to help the environment, versus any resulting harm due to limitations in economic activity.<ref>{{cite web |url= http://thehill.com/the-executive/global-warming-becomes-hot-topic-on-capitol-hill-2007-01-18.html |title= Global warming becomes hot topic on Capitol Hill |date= ] |last= Holzer |first= Jessica |accessdate=2007-05-02}}</ref> It has sparked debate in several countries about the cost of adopting alternate, cleaner energy sources in order to reduce emissions. <ref> , BBC, 3/9/07. </ref> Another point of debate is the degree to which newly-developed economies, like India and China, have a right to increase their industrial emissions, especially since China is expected to exceed the United States in greenhouse gas emissions by 2010.<ref>{{cite web |url= http://news.yahoo.com/s/afp/20070502/sc_afp/unclimatewarming_070502135622;_ylt=ApTpRIMZMVR_v_2xYw1OHVVrAlMA |title= China, India, Brazil hold up climate change talks |date= ] |last= Angleys |first = Emmanuel |accessdate=2007-05-02}}</ref>
			===Nature and wildlife===
	==Related climatic issues==
			<!-- Warning: Do not change the above title without also changing places where the gallery below is transcluded (this article summary, and effects of climate change article). -->
	{{main|Ocean acidification|global dimming|ozone depletion}}
			{{Further|Effects of climate change on oceans|Effects of climate change on biomes}}
	A variety of issues are often raised in relation to global warming. One is ], the ongoing decrease in the ] of the ]'s oceans. Increased atmospheric CO<sub>2</sub> increases the amount of CO<sub>2</sub> dissolved in the oceans.<ref>{{cite web |url=http://science.hq.nasa.gov/oceans/system/carbon.html |title=The Ocean and the Carbon Cycle |accessdate=2007-03-04 |date=] |work=]}}</ref> CO<sub>2</sub> dissolved in the ocean reacts with water to form ] resulting in acidification. Ocean surface pH is estimated to have decreased from approximately 8.25 to 8.14 since the beginning of the industrial era,<ref>{{cite journal |last= Jacobson |first= Mark Z. |date= ] |title= Studying ocean acidification with conservative, stable numerical schemes for nonequilibrium air-ocean exchange and ocean equilibrium chemistry |journal= ] |volume= 110 |issue= D7 |id= D07302 |url= http://www.stanford.edu/group/efmh/jacobson/2004JD005220.pdf |format=] |doi = 10.1029/2004JD005220 |accessdate=2007-04-28}}</ref> and it is estimated that it will drop by a further 0.3 to 0.5 units by 2100 as the ocean absorbs more anthropogenic CO<sub>2</sub>.<ref>{{cite journal |last= Orr |first= James C. |coauthors= ''et al.'' |date=] |title= Anthropogenic ocean acidification over the twenty-first century and its impact on calcifying organisms |journal= ] |volume= 437 |issue= 7059 |pages= 681–686 |url= http://www.ipsl.jussieu.fr/~jomce/acidification/paper/Orr_OnlineNature04095.pdf |format= ] |doi= 10.1038/nature04095 |accessdate= 2007-04-28}}</ref><ref>Raven, J. A. ''et al.'' (2005). Royal Society, London, UK.</ref><ref>{{cite journal| last = Caldeira | first = Ken | coauthors= Wickett, Michael E. | title = Ocean model predictions of chemistry changes from carbon dioxide emissions to the atmosphere and ocean | journal = ] |volume = 110 |issue = C09S04 | doi:10.1029/2004JC002671 | pages = 1-12 | url = http://www.agu.org/pubs/crossref/2005/2004JC002671.shtml | date = ] | accessdate = 2006-02-14}}</ref> Since organisms and ecosystems are adapted to a narrow range of pH, this raises serious concerns about the potential effects, directly driven by increased atmospheric CO<sub>2</sub>, on calcifying organisms (including phytoplankton, zooplankton, mollusks, echinoderms, and corals) that could disrupt food webs and impact human societies that depend on marine ecosystem services.<ref> Royal Society, London, UK.</ref>
			Recent warming has driven many terrestrial and freshwater species poleward and towards higher ].<ref>{{harvnb|IPCC SR15 Ch3|2018|p=218}}.</ref> For instance, the range of hundreds of North American ]s has shifted northward at an average rate of 1.5&nbsp;km/year over the past 55 years.<ref>{{Cite journal |last1=Martins |first1=Paulo Mateus |last2=Anderson |first2=Marti J. |last3=Sweatman |first3=Winston L. |last4=Punnett |first4=Andrew J. |date=9 April 2024 |title=Significant shifts in latitudinal optima of North American birds |journal=] |language=en |volume=121 |issue=15 |pages=e2307525121 |doi=10.1073/pnas.2307525121 |issn=0027-8424 |pmc=11009622 |pmid=38557189 |bibcode=2024PNAS..12107525M }}</ref> Higher atmospheric {{CO2}} levels and an extended growing season have resulted in global greening. However, heatwaves and drought have reduced ] productivity in some regions. The future balance of these opposing effects is unclear.{{Sfn|IPCC SRCCL Ch2|2019|p=133}} A related phenomenon driven by climate change is ], affecting up to 500 million hectares globally.<ref>{{Cite journal |last1=Deng |first1=Yuanhong |last2=Li |first2=Xiaoyan |last3=Shi |first3=Fangzhong |last4=Hu |first4=Xia |date=December 2021 |title=Woody plant encroachment enhanced global vegetation greening and ecosystem water-use efficiency |url=https://onlinelibrary.wiley.com/doi/10.1111/geb.13386 |journal=] |language=en |volume=30 |issue=12 |pages=2337–2353 |bibcode=2021GloEB..30.2337D |doi=10.1111/geb.13386 |issn=1466-822X |access-date=10 June 2024 |via=Wiley Online Library}}</ref> Climate change has contributed to the expansion of drier climate zones, such as the ] in the ].<ref>{{harvnb|IPCC SRCCL Summary for Policymakers|2019|p=7}}; {{harvnb|Zeng|Yoon|2009}}.</ref> The size and speed of global warming is making ] more likely.{{Sfn|Turner|Calder|Cumming|Hughes|2020|p=1}} Overall, it is expected that climate change will result in the ] of many species.{{Sfn|Urban|2015}}
			The oceans have heated more slowly than the land, but plants and animals in the ocean have migrated towards the colder poles faster than species on land.<ref>{{harvnb|Poloczanska|Brown|Sydeman|Kiessling|2013}}; {{harvnb|Lenoir|Bertrand|Comte|Bourgeaud|2020}}</ref> Just as on land, ] occur more frequently due to climate change, harming a wide range of organisms such as corals, ], and ].<ref>{{harvnb|Smale|Wernberg|Oliver|Thomsen|2019}}</ref> Ocean acidification makes it harder for ] such as ]s, ]s and corals to ]; and heatwaves have ].{{Sfn|IPCC SROCC Summary for Policymakers|2019|p=13}} ] enhanced by climate change and ] lower oxygen levels, disrupt ]s and cause great loss of marine life.<ref>{{harvnb|IPCC SROCC Ch5|2019|p=510}}</ref> Coastal ecosystems are under particular stress. Almost half of global wetlands have disappeared due to climate change and other human impacts.{{Sfn|IPCC SROCC Ch5|2019|p=451}} Plants have come under increased stress from damage by insects.<ref>{{Cite journal |last1=Azevedo-Schmidt |first1=Lauren |last2=Meineke |first2=Emily K. |last3=Currano |first3=Ellen D. |date=18 October 2022 |title=Insect herbivory within modern forests is greater than fossil localities |journal=] |language=en |volume=119 |issue=42 |pages=e2202852119 |doi=10.1073/pnas.2202852119 |doi-access=free |pmid=36215482 |pmc=9586316 |bibcode=2022PNAS..11902852A |issn=0027-8424 }}</ref>
	Another related issue that may have partially mitigated global warming in the late twentieth century is ], the gradual reduction in the amount of global direct ] at the Earth's surface. From 1960 to 1990 human-caused aerosols likely precipitated this effect. Scientists have stated with 66–90% confidence that the effects of human-caused aerosols, along with volcanic activity, have offset some of global warming, and that greenhouse gases would have resulted in more warming than observed if not for these dimming agents.<ref name=grida7/>
			{| class="center toccolours"
	], the steady decline in the total amount of ] in Earth's ], is frequently cited in relation to global warming. Although there are ], the relationship between the two is not strong.<ref>{{citation | first=Paul L. | last=Houston | publisher=Government 294/Philosophy 294 course at ] | url=http://people.ccmr.cornell.edu/~plh2/group/glblwarm/OZAGIF.HTM | title=Ozone Aside | accessdate=2007-04-29 | date=]}}</ref>
			|+ '''Climate change impacts on the environment'''
			|<gallery mode="packed" heights="120" style="line-height:120%">
			File:Bleachedcoral.jpg|alt=Underwater photograph of branching coral that is bleached white|]. ] from ] has damaged the ] and threatens ]s worldwide.<ref>{{Cite web |url=https://sos.noaa.gov/datasets/coral-reef-risk-outlook/ |title=Coral Reef Risk Outlook |date=2 January 2012 |access-date=4 April 2020 |publisher=] |quote=At present, local human activities, coupled with past thermal stress, threaten an estimated 75 percent of the world's reefs. By 2030, estimates predict more than 90% of the world's reefs will be threatened by local human activities, warming, and acidification, with nearly 60% facing high, very high, or critical threat levels.}}</ref>
			File:Orroral Valley Fire viewed from Tuggeranong January 2020.jpg|alt=Photograph of evening in a valley settlement. The skyline in the hills beyond is lit up red from the fires.|]. Drought and high temperatures worsened the ].<ref>{{harvnb|Carbon Brief, 7 January|2020}}.</ref>
			File:National Park Service Thawing permafrost (27759123542).jpg|alt=The green landscape is interrupted by a huge muddy scar where the ground has subsided.|]. ] undermine infrastructure and ], a greenhouse gas.<ref name="Turetsky 2019"/>
			File:Endangered arctic - starving polar bear (cropped).jpg|alt=An emaciated polar bear stands atop the remains of a melting ice floe.|]. Many arctic animals rely on sea ice, which has been disappearing in a warming Arctic.<ref>{{harvnb|IPCC AR5 WG2 Ch28|2014|p=1596}}: "Within 50 to 70 years, loss of hunting habitats may lead to elimination of polar bears from seasonally ice-covered areas, where two-thirds of their world population currently live."</ref>
			File:Mountain Pine Beetle damage in the Fraser Experimental Forest 2007.jpg|alt=Photograph of a large area of forest. The green trees are interspersed with large patches of damaged or dead trees turning purple-brown and light red.|]. Mild winters allow more ] to survive to kill large swaths of forest.<ref>{{Cite web |url=https://www.nps.gov/romo/learn/nature/climatechange.htm |title=What a changing climate means for Rocky Mountain National Park |publisher=] |access-date=9 April 2020}}</ref>
			</gallery>
			|}
	==References==		=== Humans ===
			<!-- Warning: Do not change the above title without also changing places where the gallery below is transcluded (this article summary, and effects of climate change article). -->
	{{reflist|2}}
			{{Main|Effects of climate change}}
			[[File:20211109 Frequency of extreme weather for different degrees of global warming - bar chart IPCC AR6 WG1 SPM.svg|thumb|upright=1.35 |Extreme weather will be progressively more common as the Earth warms.<ref name=IPCC6AR_ExtremeEvents>{{harvnb|IPCC AR6 WG1 Summary for Policymakers|2021|loc=Fig. SPM.6
			|page=SPM-23}}</ref>]]
			The effects of climate change are impacting humans everywhere in the world.<ref>{{cite journal |last1=Lenton |first1=Timothy M. |last2=Xu |first2=Chi |last3=Abrams |first3=Jesse F. |last4=Ghadiali |first4=Ashish |last5=Loriani |first5=Sina |last6=Sakschewski |first6=Boris |last7=Zimm |first7=Caroline |last8=Ebi |first8=Kristie L. |last9=Dunn |first9=Robert R. |last10=Svenning |first10=Jens-Christian |last11=Scheffer |first11=Marten |title=Quantifying the human cost of global warming |journal=] |year=2023 |volume=6 |issue=10 |pages=1237–1247 |doi=10.1038/s41893-023-01132-6 |doi-access=free|bibcode=2023NatSu...6.1237L |hdl=10871/132650 |hdl-access=free }}</ref> Impacts can be observed on all continents and ocean regions,<ref>{{Harvnb|IPCC AR5 WG2 Ch18|2014|pp=983, 1008}}</ref> with low-latitude, ] facing the greatest risk.<ref>{{Harvnb|IPCC AR5 WG2 Ch19|2014|p=1077}}.</ref> Continued warming has potentially "severe, pervasive and irreversible impacts" for people and ecosystems.<ref>{{harvnb|IPCC AR5 SYR Summary for Policymakers|2014|loc=SPM 2|p=8}}</ref> The risks are unevenly distributed, but are generally greater for disadvantaged people in developing and developed countries.<ref>{{harvnb|IPCC AR5 SYR Summary for Policymakers|2014|loc=SPM 2.3|p=13}}</ref>
			==== Health and food ====
	==Further reading==
			{{Main|Effects of climate change on agriculture#Global food security and undernutrition|Effects of climate change on human health}}
	<div class="references-small">
			The ] calls climate change one of the biggest threats to global health in the 21st century.<ref name=WHO_Nov_2023/> Scientists have warned about the irreversible harms it poses.<ref name=Romanello_et_al_2023>{{harvnb|Romanello|2023}}</ref> ] events affect public health, and ] and ].<ref name=nca2018_ch14>{{harvnb|Ebi et al.|2018}}</ref><ref name=Romanello_et_al_2022>{{harvnb|Romanello|2022}}</ref><ref name=IPCC_AR6_WG2_p9>{{harvnb|IPCC AR6 WG2 SPM|2022|p=9}}</ref> ] lead to increased illness and death.<ref name=nca2018_ch14/><ref name=Romanello_et_al_2022/> Climate change increases the intensity and frequency of extreme weather events.<ref name=Romanello_et_al_2022/><ref name=IPCC_AR6_WG2_p9/> It can affect transmission of ], such as ] and ].<ref name=Romanello_et_al_2023/><ref name=nca2018_ch14/> According to the ], 14.5&nbsp;million more deaths are expected due to climate change by 2050.<ref>{{harvnb|World Economic Forum|2024|p=4}}</ref> 30% of the global population currently live in areas where extreme heat and humidity are already associated with excess deaths.<ref name=Carbon_Brief_2017>{{harvnb|Carbon Brief, 19 June|2017}}</ref><ref>{{harvnb|Mora et al.|2017}}</ref> By 2100, 50% to 75% of the global population would live in such areas.<ref name=Carbon_Brief_2017/><ref>{{harvnb|IPCC AR6 WG2 Ch6|2022|p=988}}</ref>
	*{{cite journal
	| last = Amstrup | first=Steven C.
			While total ]s have been increasing in the past 50 years due to agricultural improvements, ].<ref name=IPCC_AR6_WG2_p9/> ] in multiple regions.<ref name=IPCC_AR6_WG2_p9/> While ] has been positively affected in some high ] areas, mid- and low-latitude areas have been negatively affected.<ref name=IPCC_AR6_WG2_p9/> According to the World Economic Forum, an increase in ] in certain regions could cause 3.2&nbsp;million deaths from ] by 2050 and ] in children.<ref>{{harvnb|World Economic Forum|2024|p=24}}</ref> With 2&nbsp;°C warming, global ] headcounts could decline by 7–10% by 2050, as less animal feed will be available.<ref>{{harvnb|IPCC AR6 WG2 Ch5|2022|p=748}}</ref> If the emissions continue to increase for the rest of century, then over 9 million climate-related deaths would occur annually by 2100.<ref>{{harvnb|IPCC AR6 WG2 Technical Summary|2022|p=63}}</ref>
	| coauthors = ], Tom S. Smith, Craig Perham, Gregory W. Thiemann
	| date = ]
			==== Livelihoods and inequality ====
	| title = Recent observations of intraspecific predation and cannibalism among polar bears in the southern Beaufort Sea
			{{Further|Economic analysis of climate change|Climate security}}
	| journal = Polar Biology
			Economic damages due to climate change may be severe and there is a chance of disastrous consequences.<ref>{{harvnb|DeFries|Edenhofer|Halliday|Heal|2019|p=3}}; {{harvnb|Krogstrup|Oman|2019|p=10}}.</ref> Severe impacts are expected in South-East Asia and ], where most of the local inhabitants are dependent upon natural and agricultural resources.<ref name="FAO-2021">{{Cite book |url=https://doi.org/10.4060/cb7431en |title=Women's leadership and gender equality in climate action and disaster risk reduction in Africa − A call for action |publisher=] & The African Risk Capacity (ARC) Group |year=2021 |isbn=978-92-5-135234-2 |location=Accra |doi=10.4060/cb7431en |s2cid=243488592 }}</ref><ref>{{harvnb|IPCC AR5 WG2 Ch13|2014|pp=796–797}}</ref> ] can prevent outdoor labourers from working. If warming reaches 4&nbsp;°C then labour capacity in those regions could be reduced by 30 to 50%.<ref>{{harvnb|IPCC AR6 WG2|2022|p=725}}</ref> The ] estimates that between 2016 and 2030, climate change could drive over 120 million people into extreme poverty without adaptation.{{Sfn|Hallegatte|Bangalore|Bonzanigo|Fay|2016|p=12}}
	| volume = 29 | issue = 11 | pages = 997-1002
	| doi = 10.1007/s00300-006-0142-5
			Inequalities based on wealth and social status have worsened due to climate change.<ref>{{harvnb|IPCC AR5 WG2 Ch13|2014|p=796}}.</ref> Major difficulties in mitigating, adapting to, and recovering from climate shocks are faced by marginalized people who have less control over resources.<ref name="Grabe-2014">Grabe, Grose and Dutt, 2014; FAO, 2011; FAO, 2021a; Fisher and Carr, 2015; IPCC, 2014; Resurrección et al., 2019; UNDRR, 2019; Yeboah et al., 2019.</ref><ref name="FAO-2021" /> ], who are subsistent on their land and ecosystems, will face endangerment to their wellness and lifestyles due to climate change.<ref>{{Cite web |title=Climate Change {{!}} United Nations For Indigenous Peoples |url=https://www.un.org/development/desa/indigenouspeoples/climate-change.html |access-date=29 April 2022 |website=United Nations Department of Economic and Social Affairs}}</ref> An expert elicitation concluded that the role of climate change in ] has been small compared to factors such as socio-economic inequality and state capabilities.{{Sfn|Mach|Kraan|Adger|Buhaug|2019}}
			While women are not inherently more at risk from climate change and shocks, limits on women's resources and discriminatory gender norms constrain their adaptive capacity and resilience.<ref name="FAO-2023">{{Cite book |url=https://doi.org/10.4060/cc5060en |title=The status of women in agrifood systems - Overview |publisher=FAO |year=2023 |location=Rome |doi=10.4060/cc5060en |s2cid=258145984 |language=EN}}</ref> For example, women's work burdens, including hours worked in agriculture, tend to decline less than men's during climate shocks such as heat stress.<ref name="FAO-2023" />
			====Climate migration====
			{{main|Climate migration}}
			Low-lying islands and coastal communities are threatened by sea level rise, which makes ] more common. Sometimes, land is permanently lost to the sea.{{Sfn|IPCC SROCC Ch4|2019|p=328}} This could lead to ] for people in island nations, such as the ] and ].<ref>{{harvnb|UNHCR|2011|p=3}}.</ref> In some regions, the rise in temperature and humidity may be too severe for humans to adapt to.{{sfn|Matthews|2018|p=399}} With worst-case climate change, models project that almost one-third of humanity might live in Sahara-like uninhabitable and extremely hot climates.<ref>{{harvnb|Balsari|Dresser|Leaning|2020}}</ref>
			These factors can drive ] or ], within and between countries.<ref name="Cattaneo-2019">{{harvnb|Cattaneo|Beine|Fröhlich|Kniveton|2019}}; {{harvnb|IPCC AR6 WG2|2022|pp=15, 53}}</ref> More people are expected to be displaced because of sea level rise, extreme weather and conflict from increased competition over natural resources. Climate change may also increase vulnerability, leading to "trapped populations" who are not able to move due to a lack of resources.<ref>{{harvnb|Flavell|2014|p=38}}; {{harvnb|Kaczan|Orgill-Meyer|2020}}</ref>
			{| class="center toccolours"
			|+ '''Climate change impacts on people'''
			|<gallery mode="packed" heights="120" style="line-height:120%">
			File:Village Telly in Mali.jpg|Environmental migration. Sparser rainfall leads to ] that harms agriculture and can displace populations. Shown: Telly, Mali (2008).<ref>{{harvnb|Serdeczny|Adams|Baarsch|Coumou|2016}}.</ref>
			File:Corn shows the affect of drought.jpg|]. Droughts, rising temperatures, and extreme weather negatively impact agriculture. Shown: Texas, US (2013).<ref>{{harvnb|IPCC SRCCL Ch5|2019|pp=439, 464}}.</ref>
			File:Acqua alta in Piazza San Marco-original.jpg|]. Sea-level rise increases flooding in low-lying coastal regions. Shown: ] (2004).<ref name="NOAAnuisance">{{cite web|url=http://oceanservice.noaa.gov/facts/nuisance-flooding.html |title=What is nuisance flooding? |author=] |access-date=April 8, 2020}}</ref>
			File:US Navy 071120-M-8966H-005 An aerial view over southern Bangladesh reveals extensive flooding as a result of Cyclone Sidr.jpg|]. Bangladesh after ] (2007) is an example of catastrophic flooding from increased rainfall.<ref>{{harvnb|Kabir|Khan|Ball|Caldwell|2016}}.</ref>
			File:Argentina geos5 202211.jpg|Heat wave intensification. Events like the ] are becoming more common.<ref>{{harvnb|Van Oldenborgh|Philip|Kew|Vautard|2019}}.</ref>
			</gallery>
			|}
			== Reducing and recapturing emissions ==
			{{detail|Climate change mitigation}}
			]
			Climate change can be mitigated by reducing the rate at which greenhouse gases are emitted into the atmosphere, and by increasing the rate at which carbon dioxide is removed from the atmosphere.<ref>{{harvnb|IPCC AR5 SYR Glossary|2014|p=125}}.</ref> To limit global warming to less than 1.5&nbsp;°C global greenhouse gas emissions needs to be ] by 2050, or by 2070 with a 2&nbsp;°C target.<ref name="IPCC-2018 p12">{{harvnb|IPCC SR15 Summary for Policymakers|2018|p=12}}</ref> This requires far-reaching, systemic changes on an unprecedented scale in energy, land, cities, transport, buildings, and industry.<ref>{{harvnb|IPCC SR15 Summary for Policymakers|2018|p=15}}</ref>
			The ] estimates that countries need to triple their ] within the next decade to limit global warming to 2&nbsp;°C. An even greater level of reduction is required to meet the 1.5&nbsp;°C goal.<ref>{{harvnb|United Nations Environment Programme|2019|p=XX}}</ref> With pledges made under the Paris Agreement as of 2024, there would be a 66% chance that global warming is kept under 2.8&nbsp;°C by the end of the century (range: 1.9–3.7&nbsp;°C, depending on exact implementation and technological progress). When only considering current policies, this raises to 3.1&nbsp;°C.{{sfn|United Nations Environment Programme|2024|pp=33, 34}} Globally, limiting warming to 2&nbsp;°C may result in higher economic benefits than economic costs.<ref>{{harvnb|IPCC AR6 WG3 Ch3|2022|p=300}}: "The global benefits of pathways limiting warming to 2&nbsp;°C (>67%) outweigh global mitigation costs over the 21st century, if aggregated economic impacts of climate change are at the moderate to high end of the assessed range, and a weight consistent with economic theory is given to economic impacts over the long term. This holds true even without accounting for benefits in other sustainable development dimensions or nonmarket damages from climate change (medium confidence)."</ref>
			Although there is no single pathway to limit global warming to 1.5 or 2&nbsp;°C,<ref>{{harvnb|IPCC SR15 Ch2|2018|p=109}}.</ref> most scenarios and strategies see a major increase in the use of renewable energy in combination with increased energy efficiency measures to generate the needed greenhouse gas reductions.<ref name="Teske, ed. 2019 xxiii">{{harvnb|Teske, ed.|2019|p=xxiii}}.</ref> To reduce pressures on ecosystems and enhance their carbon sequestration capabilities, changes would also be necessary in agriculture and forestry,<ref>{{harvnb|World Resources Institute, 8 August|2019}}</ref> such as preventing ] and restoring natural ecosystems by ].<ref>{{harvnb|IPCC SR15 Ch3|2018|p=266}}: "Where reforestation is the restoration of natural ecosystems, it benefits both carbon sequestration and conservation of biodiversity and ecosystem services."</ref>
			Other approaches to mitigating climate change have a higher level of risk. Scenarios that limit global warming to 1.5&nbsp;°C typically project the large-scale use of ] over the 21st century.<ref>{{harvnb|Bui|Adjiman|Bardow|Anthony|2018|p=1068}}; {{harvnb|IPCC SR15 Summary for Policymakers|2018|p=17}}</ref> There are concerns, though, about over-reliance on these technologies, and environmental impacts.<ref>{{harvnb|IPCC SR15|2018|p=34}}; {{harvnb|IPCC SR15 Summary for Policymakers|2018|p=17}}</ref> ] (SRM) is under discussion as a possible supplement to reductions in emissions. However, SRM raises significant ethical and ] concerns, and its risks are not well understood.<ref>{{harvnb|IPCC SR15 Ch4|2018|pp=347–352}}</ref>
			=== Clean energy ===
			{{Main|Sustainable energy|Sustainable transport}}
			] sources even as ] have begun rapidly increasing.<ref>{{harvnb|Friedlingstein|Jones|O'Sullivan|Andrew|2019}}</ref>]]
			]
			Renewable energy is key to limiting climate change.<ref name="United Nations Environment Programme 2019 46" /> For decades, fossil fuels have accounted for roughly 80% of the world's energy use.<ref>{{harvnb|IEA World Energy Outlook 2023|pp=18}}</ref> The remaining share has been split between nuclear power and renewables (including ], ], wind and solar power and ]).<ref>{{harvnb|REN21|2020|p=32|loc=Fig.1}}.</ref> Fossil fuel use is expected to peak in absolute terms prior to 2030 and then to decline, with coal use experiencing the sharpest reductions.<ref>{{harvnb|IEA World Energy Outlook 2023|pp=18,26}}</ref> Renewables represented 86% of all new electricity generation installed in 2023.<ref name="IRENA">{{cite web |title=Record Growth in Renewables, but Progress Needs to be Equitable |url=https://www.irena.org/News/pressreleases/2024/Mar/Record-Growth-in-Renewables-but-Progress-Needs-to-be-Equitable |website=IRENA |date=27 March 2024}}</ref> Other forms of clean energy, such as nuclear and hydropower, currently have a larger share of the energy supply. However, their future growth forecasts appear limited in comparison.<ref>{{harvnb|IEA|2021|p=57, Fig 2.5}}; {{harvnb|Teske|Pregger|Naegler|Simon|2019|p=180, Table 8.1}}</ref>
			While ] and onshore wind are now among the cheapest forms of adding new power generation capacity in many locations,<ref>{{harvnb|Our World in Data-Why did renewables become so cheap so fast?}}; {{harvnb| IEA – Projected Costs of Generating Electricity 2020}}</ref> green energy policies are needed to achieve a rapid transition from fossil fuels to renewables.<ref>{{cite web |url=https://www.ipcc.ch/2022/04/04/ipcc-ar6-wgiii-pressrelease/ |title=IPCC Working Group III report: Mitigation of Climate Change |date=4 April 2022 |access-date=19 January 2024 |publisher=Intergovernmental Panel on Climate Change}}</ref> To achieve carbon neutrality by 2050, renewable energy would become the dominant form of electricity generation, rising to 85% or more by 2050 in some scenarios. Investment in coal would be eliminated and coal use nearly phased out by 2050.<ref>{{harvnb|IPCC SR15 Ch2|2018|loc=Figure 2.15|p=131}}</ref><ref>{{harvnb|Teske|2019|pp=409–410}}.</ref>
			Electricity generated from renewable sources would also need to become the main energy source for heating and transport.<ref>{{harvnb|United Nations Environment Programme|2019|loc=Table ES.3|p=XXIII}}; {{harvnb|Teske, ed.|2019|p=xxvii, Fig.5}}.</ref> Transport can switch away from ] vehicles and towards ]s, public transit, and ] (cycling and walking).<ref name="IPCC-2018 p142">{{harvnb|IPCC SR15 Ch2|2018|pp=142–144}}; {{harvnb|United Nations Environment Programme|2019|loc=Table ES.3 & p. 49}}</ref><ref>{{Cite web |year=2016 |title=Transport emissions |url=https://ec.europa.eu/clima/eu-action/transport-emissions_en |access-date=2 January 2022 |website=Climate action |publisher=] |archive-url=https://web.archive.org/web/20211010225533/https://ec.europa.eu/clima/eu-action/transport-emissions_en |archive-date=10 October 2021 |url-status=live}}</ref> For shipping and flying, low-carbon fuels would reduce emissions.<ref name="IPCC-2018 p142" /> Heating could be increasingly decarbonized with technologies like ]s.<ref>{{harvnb|IPCC AR5 WG3 Ch9|2014|p=697}}; {{harvnb|NREL|2017|pp=vi, 12}}</ref>
			There are obstacles to the continued rapid growth of clean energy, including renewables.<ref>{{harvnb|Berrill|Arvesen|Scholz|Gils|2016}}.</ref> Wind and solar produce energy ]. Traditionally, ] and fossil fuel power plants have been used when variable energy production is low. Going forward, ] can be expanded, ] can be matched, and long-distance ] can smooth variability of renewable outputs.<ref name="United Nations Environment Programme 2019 46">{{harvnb|United Nations Environment Programme|2019|p=46}}; {{harvnb|Vox, 20 September|2019}}; {{cite journal |title=The Role of Firm Low-Carbon Electricity Resources in Deep Decarbonization of Power Generation |year=2018 |last1=Sepulveda |first1=Nestor A. |last2=Jenkins |first2=Jesse D. |last3=De Sisternes |first3=Fernando J. |last4=Lester |first4=Richard K. |journal=] |volume=2 |issue=11 |pages=2403–2420 |doi=10.1016/j.joule.2018.08.006 |doi-access=free|bibcode=2018Joule...2.2403S }}</ref> Bioenergy is often not carbon-neutral and may have negative consequences for food security.<ref>{{harvnb|IPCC SR15 Ch4|2018|pp=324–325}}.</ref> The growth of nuclear power is constrained by controversy around ], ], and ].<ref>{{Citec|last1=Gill |first1=Matthew |last2=Livens |first2=Francis |last3=Peakman |first3=Aiden |in=Letcher |year=2020 |pages=147–149 |chapter=Nuclear Fission}}</ref><ref>{{Cite journal |last1=Horvath |first1=Akos |last2=Rachlew |first2=Elisabeth |date=January 2016 |title=Nuclear power in the 21st century: Challenges and possibilities |journal=] |volume=45 |issue=Suppl 1 |pages=S38–49 |doi=10.1007/s13280-015-0732-y |issn=1654-7209 |pmc=4678124 |pmid=26667059|bibcode=2016Ambio..45S..38H }}</ref> Hydropower growth is limited by the fact that the best sites have been developed, and new projects are confronting increased social and environmental concerns.<ref>{{cite web |title=Hydropower |url=https://www.iea.org/reports/hydropower |website=iea.org |publisher=] |access-date=12 October 2020 |quote=Hydropower generation is estimated to have increased by over 2% in 2019 owing to continued recovery from drought in Latin America as well as strong capacity expansion and good water availability in China (...) capacity expansion has been losing speed. This downward trend is expected to continue, due mainly to less large-project development in China and Brazil, where concerns over social and environmental impacts have restricted projects.}}</ref>
			] improves human health by minimizing climate change as well as reducing air pollution deaths,<ref>{{harvnb|Watts|Amann|Arnell|Ayeb-Karlsson|2019|p=1854}}; {{harvnb|WHO|2018|p=27}}</ref> which were estimated at 7 million annually in 2016.<ref>{{harvnb|Watts|Amann|Arnell|Ayeb-Karlsson|2019|p=1837}}; {{harvnb|WHO|2016}}</ref> Meeting the Paris Agreement goals that limit warming to a 2&nbsp;°C increase could save about a million of those lives per year by 2050, whereas limiting global warming to 1.5&nbsp;°C could save millions and simultaneously increase ] and reduce poverty.<ref>{{harvnb|WHO|2018|p=27}}; {{harvnb|Vandyck|Keramidas|Kitous|Spadaro|2018}}; {{harvnb|IPCC SR15|2018|p=97}}: "Limiting warming to 1.5&nbsp;°C can be achieved synergistically with poverty alleviation and improved energy security and can provide large public health benefits through improved air quality, preventing millions of premature deaths. However, specific mitigation measures, such as bioenergy, may result in trade-offs that require consideration."</ref> Improving air quality also has economic benefits which may be larger than mitigation costs.<ref>{{harvnb|IPCC AR6 WG3|2022|p=300}}</ref>
			=== Energy conservation ===
			{{Main|Efficient energy use|Energy conservation}}
			Reducing energy demand is another major aspect of reducing emissions.<ref>{{harvnb|IPCC SR15 Ch2|2018|p=97}}</ref> If less energy is needed, there is more flexibility for clean energy development. It also makes it easier to manage the electricity grid, and minimizes ] infrastructure development.<ref>{{harvnb|IPCC AR5 SYR Summary for Policymakers|2014|p=29}}; {{harvnb|IEA|2020b}}</ref> Major increases in energy efficiency investment will be required to achieve climate goals, comparable to the level of investment in renewable energy.<ref>{{harvnb|IPCC SR15 Ch2|2018|p=155|loc=Fig. 2.27}}</ref> Several ] related changes in energy use patterns, energy efficiency investments, and funding have made forecasts for this decade more difficult and uncertain.<ref>{{harvnb|IEA|2020b}}</ref>
			Strategies to reduce energy demand vary by sector. In the transport sector, passengers and freight can switch to more efficient travel modes, such as buses and trains, or use electric vehicles.<ref>{{harvnb|IPCC SR15 Ch2|2018|p=142}}</ref> Industrial strategies to reduce energy demand include improving heating systems and motors, designing less energy-intensive products, and increasing product lifetimes.<ref>{{harvnb|IPCC SR15 Ch2|2018|pp=138–140}}</ref> In the building sector the focus is on better design of new buildings, and higher levels of energy efficiency in retrofitting.<ref>{{harvnb|IPCC SR15 Ch2|2018|pp=141–142}}</ref> The use of technologies like heat pumps can also increase building energy efficiency.<ref>{{harvnb|IPCC AR5 WG3 Ch9|2014|pp=686–694}}.</ref>
			=== Agriculture and industry ===
			{{See also|Sustainable agriculture|Green industrial policy}}
			] Agriculture and forestry face a triple challenge of limiting greenhouse gas emissions, preventing the further conversion of forests to agricultural land, and meeting increases in world food demand.<ref>{{harvnb|World Resources Institute, December|2019|p=1}}</ref> A set of actions could reduce agriculture and forestry-based emissions by two-thirds from 2010 levels. These include reducing growth in demand for food and other agricultural products, increasing land productivity, protecting and restoring forests, and reducing greenhouse gas emissions from agricultural production.<ref>{{harvnb|World Resources Institute, December|2019|pp=1, 3}}</ref>
			On the demand side, a key component of reducing emissions is shifting people towards ].<ref>{{Harvnb|IPCC SRCCL|2019|p=22|loc=B.6.2}}</ref> Eliminating the production of livestock for ] would eliminate about 3/4ths of all emissions from agriculture and other land use.<ref>{{Harvnb|IPCC SRCCL Ch5|2019|pp=487,488|loc=FIGURE 5.12}} Humans on a vegan exclusive diet would save about 7.9 Gt{{CO2}} equivalent per year by 2050 {{harvnb|IPCC AR6 WG1 Technical Summary|2021|p=51}} Agriculture, Forestry and Other Land Use used an average of 12 Gt{{CO2}} per year between 2007 and 2016 (23% of total anthropogenic emissions).</ref> Livestock also occupy 37% of ice-free land area on Earth and consume feed from the 12% of land area used for crops, driving deforestation and land degradation.<ref>{{Harvnb|IPCC SRCCL Ch5|2019|pp=82, 162|loc=FIGURE 1.1}}</ref>
			Steel and cement production are responsible for about 13% of industrial {{CO2}} emissions. In these industries, carbon-intensive materials such as coke and lime play an integral role in the production, so that reducing {{CO2}} emissions requires research into alternative chemistries.<ref>{{cite web|title=Low and zero emissions in the steel and cement industries|url=https://www.oecd.org/greengrowth/GGSD2019_IssuePaper_CementSteel.pdf|pages=11, 19–22}}</ref> Where energy production or {{CO2}}-intensive ] continue to produce waste {{CO2}}, technology can sometimes be used to capture and store most of the gas instead of releasing it to the atmosphere.<ref name=":22">{{Cite web |last1=Lebling |first1=Katie |last2=Gangotra |first2=Ankita |last3=Hausker |first3=Karl |last4=Byrum |first4=Zachary |date=2023-11-13 |title=7 Things to Know About Carbon Capture, Utilization and Sequestration |url=https://www.wri.org/insights/carbon-capture-technology |publisher=] |language=en}}] Text was copied from this source, which is available under a ]</ref> This technology, ] (CCS), could have a critical but limited role in reducing emissions.<ref name=":22" /> It is relatively expensive<ref>{{harvnb|IPCC AR6 WG3 Summary for Policymakers|2022|p=38}}</ref> and has been deployed only to an extent that removes around 0.1% of annual greenhouse gas emissions.<ref name=":22" />
			=== Carbon dioxide removal ===
			{{Main|Carbon dioxide removal|Carbon sequestration}}
			]s, including plant growth, soil uptake, and ocean uptake (]).]]
			Natural carbon sinks can be enhanced to sequester significantly larger amounts of {{CO2}} beyond naturally occurring levels.<ref>{{harvnb|World Resources Institute, 8 August|2019}}: {{harvnb|IPCC SRCCL Ch2|2019|pp=189–193}}.</ref> Reforestation and ] (planting forests where there were none before) are among the most mature sequestration techniques, although the latter raises food security concerns.<ref>{{harvnb|Kreidenweis|Humpenöder|Stevanović|Bodirsky|2016}}</ref> Farmers can promote sequestration of ] through practices such as use of winter ], reducing the intensity and frequency of ], and using compost and manure as soil amendments.<ref>{{harvnb|National Academies of Sciences, Engineering, and Medicine|2019|pp=95–102}}</ref> Forest and landscape restoration yields many benefits for the climate, including greenhouse gas emissions sequestration and reduction.<ref name="Duchelle-2022" /> Restoration/recreation of coastal wetlands, ] and ]s increases the uptake of carbon into organic matter.<ref>{{harvnb|National Academies of Sciences, Engineering, and Medicine|2019|pp=45–54}}</ref><ref>{{Cite journal |last1=Nelson |first1=J. D. J. |last2=Schoenau |first2=J. J. |last3=Malhi |first3=S. S. |date=1 October 2008 |title=Soil organic carbon changes and distribution in cultivated and restored grassland soils in Saskatchewan |url=https://doi.org/10.1007/s10705-008-9175-1 |journal=Nutrient Cycling in Agroecosystems |language=en |volume=82 |issue=2 |pages=137–148 |doi=10.1007/s10705-008-9175-1 |bibcode=2008NCyAg..82..137N |s2cid=24021984 |issn=1573-0867}}</ref> When carbon is sequestered in soils and in organic matter such as trees, there is a risk of the carbon being re-released into the atmosphere later through changes in land use, fire, or other changes in ecosystems.<ref>{{harvnb|Ruseva|Hedrick|Marland|Tovar|2020}}</ref>
			The use of bioenergy in conjunction with carbon capture and storage (]) can result in net negative emissions as {{CO2}} is drawn from the atmosphere.<ref>{{harvnb|IPCC AR5 SYR|2014|p=125}}; {{harvnb|Bednar|Obersteiner|Wagner|2019}}.</ref> It remains highly uncertain whether carbon dioxide removal techniques will be able to play a large role in limiting warming to 1.5&nbsp;°C. Policy decisions that rely on carbon dioxide removal increase the risk of global warming rising beyond international goals.<ref>{{harvnb|IPCC SR15|2018|p=34}}</ref>
			== Adaptation ==
			{{main|Climate change adaptation}}
			Adaptation is "the process of adjustment to current or expected changes in climate and its effects".<ref name="IPCC-2022">IPCC, 2022: . In: . Cambridge University Press, Cambridge and New York, pp. 3–33, {{doi|10.1017/9781009325844.001}}.</ref>{{rp|5}} Without additional mitigation, adaptation cannot avert the risk of "severe, widespread and irreversible" impacts.{{sfn|IPCC AR5 SYR|2014|p=17}} More severe climate change requires more transformative adaptation, which can be prohibitively expensive.{{sfn|IPCC SR15 Ch4|2018|pp=396–397}} The ] is unevenly distributed across different regions and populations, and developing countries generally have less.<ref>{{Harvnb|IPCC AR4 WG2 Ch19|2007|p=796}}.</ref> The first two decades of the 21st century saw an increase in adaptive capacity in most low- and middle-income countries with improved access to basic ] and electricity, but progress is slow. Many countries have implemented adaptation policies. However, there is a considerable gap between necessary and available finance.{{sfn|UNEP|2018|pp=xii–xiii}}
			Adaptation to sea level rise consists of avoiding at-risk areas, learning to live with increased flooding, and building ]s. If that fails, ] may be needed.<ref>{{Cite journal |last1=Stephens |first1=Scott A. |last2=Bell |first2=Robert G. |last3=Lawrence |first3=Judy |year=2018 |title=Developing signals to trigger adaptation to sea-level rise |journal=] |volume=13 |issue=10 |at=104004 |doi=10.1088/1748-9326/aadf96 |bibcode=2018ERL....13j4004S |issn=1748-9326 |doi-access=free}}</ref> There are economic barriers for tackling dangerous heat impact. Avoiding strenuous work or having ] is not possible for everybody.{{sfn|Matthews|2018|p=402}} In agriculture, adaptation options include a switch to more sustainable diets, diversification, erosion control, and genetic improvements for increased tolerance to a changing climate.{{sfn|IPCC SRCCL Ch5|2019|p=439}} Insurance allows for risk-sharing, but is often difficult to get for people on lower incomes.<ref>{{Cite journal |last1=Surminski |first1=Swenja |last2=Bouwer |first2=Laurens M. |last3=Linnerooth-Bayer |first3=Joanne |year=2016 |title=How insurance can support climate resilience |url=https://www.nature.com/articles/nclimate2979 |journal=] |volume=6 |issue=4 |pages=333–334 |doi=10.1038/nclimate2979 |bibcode=2016NatCC...6..333S |issn=1758-6798}}</ref> Education, migration and ]s can reduce climate vulnerability.{{sfn|IPCC SR15 Ch4|2018|pp=336–337}} Planting mangroves or encouraging other coastal vegetation can buffer storms.<ref>{{Cite web |title=Mangroves against the storm |url=https://social.shorthand.com/IUCN_forests/nCec1jyqvn/mangroves-against-the-storm.html |access-date=20 January 2023 |website=Shorthand |language=en}}</ref><ref>{{Cite web |title=How marsh grass could help protect us from climate change |url=https://www.weforum.org/agenda/2021/10/how-marsh-grass-protects-shorelines/ |access-date=20 January 2023 |website=World Economic Forum |date=24 October 2021 |language=en}}</ref>
			Ecosystems adapt to climate change, a process that can be supported by human intervention. By increasing connectivity between ecosystems, species can migrate to more favourable climate conditions. Species can also be ]. Protection and restoration of natural and semi-natural areas helps build resilience, making it easier for ecosystems to adapt. Many of the actions that promote adaptation in ecosystems, also help humans adapt via ]. For instance, restoration of ] makes catastrophic fires less likely, and reduces human exposure. Giving rivers more space allows for more water storage in the natural system, reducing flood risk. Restored forest acts as a carbon sink, but planting trees in unsuitable regions can exacerbate climate impacts.<ref>{{Cite journal |last1=Morecroft |first1=Michael D. |last2=Duffield |first2=Simon |last3=Harley |first3=Mike |last4=Pearce-Higgins |first4=James W. |last5=Stevens |first5=Nicola |last6=Watts |first6=Olly |last7=Whitaker |first7=Jeanette |display-authors=4 |year=2019 |title=Measuring the success of climate change adaptation and mitigation in terrestrial ecosystems |journal=] |volume=366 |issue=6471 |page=eaaw9256 |doi=10.1126/science.aaw9256 |issn=0036-8075 |pmid=31831643 |s2cid=209339286 |doi-access=free}}</ref>
			There are ] but also trade-offs between adaptation and mitigation.<ref>{{Cite journal |last1=Berry |first1=Pam M. |last2=Brown |first2=Sally |last3=Chen |first3=Minpeng |last4=Kontogianni |first4=Areti |last5=Rowlands |first5=Olwen |last6=Simpson |first6=Gillian |last7=Skourtos |first7=Michalis |display-authors=4 |year=2015 |title=Cross-sectoral interactions of adaptation and mitigation measures |url=https://doi.org/10.1007/s10584-014-1214-0 |journal=] |volume=128 |issue=3 |pages=381–393 |bibcode=2015ClCh..128..381B |doi=10.1007/s10584-014-1214-0 |issn=1573-1480 |s2cid=153904466|hdl=10.1007/s10584-014-1214-0 |hdl-access=free }}</ref> An example for synergy is increased food productivity, which has large benefits for both adaptation and mitigation.<ref>{{Harvnb|IPCC AR5 SYR|2014|p=54}}.</ref> An example of a trade-off is that increased use of air conditioning allows people to better cope with heat, but increases energy demand. Another trade-off example is that more compact ] may reduce emissions from transport and construction, but may also increase the ] effect, exposing people to heat-related health risks.<ref>{{Cite journal |last=Sharifi |first=Ayyoob |year=2020 |title=Trade-offs and conflicts between urban climate change mitigation and adaptation measures: A literature review |journal=Journal of Cleaner Production |volume=276 |page=122813 |doi=10.1016/j.jclepro.2020.122813 |bibcode=2020JCPro.27622813S |s2cid=225638176 |issn=0959-6526 |url=http://www.sciencedirect.com/science/article/pii/S0959652620328584}}</ref>
			{| class="center toccolours"
			|+ '''Examples of adaptation methods'''
			|<gallery mode="packed" heights="120" style="line-height:120%">
			File:FrontLines-EGAT 2011 Environment Photo Contest Top Entry (5842818280).jpg|] planting and other ] can reduce ].
			File:Seawallventnor.jpg|]s to protect against ] worsened by ]
			File:20080708 Chicago City Hall Green Roof Edit1.jpg|]s to provide cooling in cities
			File:2013.02-402-294a_Pearl_millet,breeding,selfing_ICRISAT,Patancheru(Hyderabad,Andhra_Pradesh),IN_wed20feb2013.jpg|] for ]
			</gallery>
			|}
			== Policies and politics ==
			{{See also|Politics of climate change|Climate change mitigation#Policies}}
			] ranks countries by greenhouse gas emissions (40% of score), renewable energy (20%), energy use (20%), and climate policy (20%).
			{| border="0" cellspacing="0" cellpadding="0" style="width:100%;"
			|-
			|valign="top"|
			{{legend|#31a354|High}}
			|valign="top"|
			{{legend|#fee391|Medium}}
			|valign="top"|
			{{legend|#fe9929|Low}}
			|valign="top"|
			{{legend|#d7301f|Very low}}
			|}]]
			Countries that are most ] have typically been responsible for a small share of global emissions. This raises questions about justice and fairness.<ref>{{harvnb|IPCC AR5 SYR Summary for Policymakers|2014|loc=Section 3|p=17}}</ref> Limiting global warming makes it much easier to achieve the UN's ], such as eradicating poverty and reducing inequalities. The connection is recognized in ] which is to "take urgent action to combat climate change and its impacts".<ref>{{harvnb|IPCC SR15 Ch5|2018|p=447}}; United Nations (2017) Resolution adopted by the General Assembly on 6 July 2017, ] ()</ref> The goals on food, clean water and ecosystem protection have synergies with climate mitigation.{{sfn|IPCC SR15 Ch5|2018|p=477}}
			The ] of climate change is complex. It has often been framed as a ], in which all countries benefit from mitigation done by other countries, but individual countries would lose from switching to a ] themselves. Sometimes mitigation also has localized benefits though. For instance, the benefits of a ] to public health and local environments exceed the costs in almost all regions.<ref name="Rauner 2020">{{harvnb|Rauner|Bauer|Dirnaichner|Van Dingenen|2020}}</ref> Furthermore, net importers of fossil fuels win economically from switching to clean energy, causing net exporters to face ]: fossil fuels they cannot sell.<ref>{{harvnb|Mercure|Pollitt|Viñuales|Edwards|2018}}</ref>
			=== Policy options ===
			{{Further|Climate policy}}
			A wide range of ], ]s, and laws are being used to reduce emissions. As of 2019, ] covers about 20% of global greenhouse gas emissions.<ref>{{harvnb|World Bank, June|2019|p=12|loc=Box 1}}</ref> Carbon can be priced with ]es and ].<ref>{{harvnb|Union of Concerned Scientists, 8 January|2017}}; {{harvnb|Hagmann|Ho|Loewenstein|2019}}.</ref> Direct global ] reached $319&nbsp;billion in 2017, and $5.2&nbsp;trillion when indirect costs such as air pollution are priced in.<ref>{{harvnb|Watts|Amann|Arnell|Ayeb-Karlsson|2019|p=1866}}</ref> Ending these can cause a 28% reduction in global carbon emissions and a 46% reduction in air pollution deaths.<ref>{{harvnb|UN Human Development Report|2020|p=10}}</ref> Money saved on fossil subsidies could be used to support the ] instead.<ref>{{harvnb|International Institute for Sustainable Development|2019|p=iv}}</ref> More direct methods to reduce greenhouse gases include vehicle efficiency standards, renewable fuel standards, and air pollution regulations on heavy industry.<ref>{{harvnb|ICCT|2019|p=iv}}; {{harvnb|Natural Resources Defense Council, 29 September|2017}}</ref> Several countries ].<ref>{{harvnb|National Conference of State Legislators, 17 April|2020}}; {{harvnb|European Parliament, February|2020}}</ref>
			==== Climate justice ====
			Policy designed through the lens of ] tries to address ] issues and social inequality. According to proponents of climate justice, the costs of climate adaptation should be paid by those most responsible for climate change, while the beneficiaries of payments should be those suffering impacts. One way this can be addressed in practice is to have wealthy nations pay poorer countries to adapt.<ref>{{harvnb|Carbon Brief, 16 October|2021}}</ref>
			Oxfam found that in 2023 the wealthiest 10% of people were responsible for 50% of global emissions, while the bottom 50% were responsible for just 8%.<ref>{{Cite journal|title=Climate Equality: A planet for the 99% |last1=Khalfan|first1=Ashfaq|last2=Lewis|first2=Astrid Nilsson|last3=Aguilar|first3=Carlos|last4=Persson|first4=Jacqueline|last5=Lawson|first5=Max|last6=Dab|first6=Nafkote|last7=Jayoussi|first7=Safa|last8=Acharya|first8=Sunil|date=November 2023|website=Oxfam Digital Repository |publisher=Oxfam GB |doi=10.21201/2023.000001|url=https://oxfamilibrary.openrepository.com/bitstream/handle/10546/621551/cr-climate-equality-201123-en-summ.pdf|access-date=18 December 2023}}</ref> Production of emissions is another way to look at responsibility: under that approach, the top 21 fossil fuel companies would owe cumulative ] of $5.4&nbsp;trillion over the period 2025–2050.<ref name=OneEarth_20230519>{{cite journal |last1=Grasso |first1=Marco |last2=Heede |first2=Richard |title=Time to pay the piper: Fossil fuel companies' reparations for climate damages |journal=One Earth |date=19 May 2023 |volume=6 |issue=5 |pages=459–463 |doi=10.1016/j.oneear.2023.04.012 |bibcode=2023OEart...6..459G |bibcode-access=free |s2cid=258809532 |s2cid-access=free |doi-access=free |hdl=10281/416137 |hdl-access=free }}</ref> To achieve a ], people working in the fossil fuel sector would also need other jobs, and their communities would need investments.<ref>{{harvnb|Carbon Brief, 4 Jan|2017}}.</ref>
			=== International climate agreements ===
			{{Further|United Nations Framework Convention on Climate Change}}
			]
			]
			Nearly all countries in the world are parties to the 1994 ] (UNFCCC).<ref>{{harvnb|UNFCCC, "What is the United Nations Framework Convention on Climate Change?"}}</ref> The goal of the UNFCCC is to prevent dangerous human interference with the climate system.<ref>{{harvnb|UNFCCC|1992|loc=Article 2}}.</ref> As stated in the convention, this requires that greenhouse gas concentrations are stabilized in the atmosphere at a level where ecosystems can adapt naturally to climate change, food production is not threatened, and ] can be sustained.<ref>{{Harvnb|IPCC AR4 WG3 Ch1|2007|p=97}}.</ref> The UNFCCC does not itself restrict emissions but rather provides a framework for protocols that do. Global emissions have risen since the UNFCCC was signed.<ref name="EPA-2019">{{harvnb|EPA|2019}}.</ref> ] are the stage of global negotiations.<ref>{{harvnb|UNFCCC, "What are United Nations Climate Change Conferences?"}}</ref>
			The 1997 ] extended the UNFCCC and included legally binding commitments for most developed countries to limit their emissions.<ref>{{harvnb|Kyoto Protocol|1997}}; {{harvnb|Liverman|2009|p=290}}.</ref> During the negotiations, the ] (representing ]) pushed for a mandate requiring ] to " the lead" in reducing their emissions,<ref>{{harvnb|Dessai|2001|p=4}}; {{harvnb|Grubb|2003}}.</ref> since developed countries contributed most to the ] in the atmosphere. Per-capita emissions were also still relatively low in developing countries and developing countries would need to emit more to meet their development needs.<ref>{{harvnb|Liverman|2009|p=290}}.</ref>
			The 2009 ] has been widely portrayed as disappointing because of its low goals, and was rejected by poorer nations including the G77.<ref>{{harvnb|Müller|2010}}; {{harvnb|The New York Times, 25 May|2015}}; {{harvnb|UNFCCC: Copenhagen|2009}}; {{harvnb|EUobserver, 20 December|2009}}.</ref> Associated parties aimed to limit the global temperature rise to below 2&nbsp;°C.<ref>{{harvnb|UNFCCC: Copenhagen|2009}}.</ref> The Accord set the goal of sending $100&nbsp;billion per year to developing countries for mitigation and adaptation by 2020, and proposed the founding of the ].<ref>{{cite conference |date=7–18 December 2009 |title=Conference of the Parties to the Framework Convention on Climate Change |url=http://unfccc.int/meetings/cop_15/items/5257.php |location=Copenhagen |id=un document= FCCC/CP/2009/L.7 |archive-url=https://web.archive.org/web/20101018074452/http://unfccc.int/meetings/cop_15/items/5257.php |archive-date=18 October 2010 |access-date=24 October 2010 |url-status=live}}</ref> {{As of|2020|}}, only 83.3&nbsp;billion were delivered. Only in 2023 the target is expected to be achieved.<ref>{{cite news |last1=Bennett |first1=Paige |title=High-Income Nations Are on Track Now to Meet $100 Billion Climate Pledges, but They're Late |url=https://www.ecowatch.com/wealthy-countries-climate-change-reparations.html |access-date=10 May 2023 |agency=Ecowatch |date=2 May 2023}}</ref>
			In 2015 all UN countries negotiated the ], which aims to keep global warming well below 2.0&nbsp;°C and contains an aspirational goal of keeping warming under {{val|1.5|u=°C}}.{{sfn|Paris Agreement|2015}} The agreement replaced the Kyoto Protocol. Unlike Kyoto, no binding emission targets were set in the Paris Agreement. Instead, a set of procedures was made binding. Countries have to regularly set ever more ambitious goals and reevaluate these goals every five years.<ref>{{harvnb|Climate Focus|2015|p=3}}; {{harvnb|Carbon Brief, 8 October|2018}}.</ref> The Paris Agreement restated that developing countries must be financially supported.<ref>{{harvnb|Climate Focus|2015|p=5}}.</ref> {{As of|October 2021}}, 194 states and the ] have signed the treaty and 191 states and the EU have ] or acceded to the agreement.<ref>{{cite web |title=Status of Treaties, United Nations Framework Convention on Climate Change |url=https://treaties.un.org/Pages/ViewDetails.aspx?src=TREATY&mtdsg_no=XXVII-7-d&chapter=27&clang=_en |access-date=13 October 2021 |website=United Nations Treaty Collection}}; {{harvnb|Salon, 25 September|2019}}.</ref>
			The 1987 ], an international agreement to phase out production of ozone-depleting gases, has had benefits for climate change mitigation.<ref>{{harvnb|Velders|Andersen|Daniel|Fahey|McFarland|2007}}; {{harvnb|Young|Harper|Huntingford|Paul|Morgenstern|Newman|Oman|Madronich|Garcia|2021}}</ref> Several ozone-depleting gases like ] are powerful greenhouse gases, so banning their production and usage may have avoided a temperature rise of 0.5&nbsp;°C–1.0&nbsp;°C,<ref>{{harvnb|WMO SAOD Executive Summary|2022|pp=20, 31}}</ref> as well as additional warming by preventing damage to vegetation from ] radiation.<ref>{{harvnb|WMO SAOD Executive Summary|2022|pp=20, 35}}; {{harvnb|Young|Harper|Huntingford|Paul|Morgenstern|Newman|Oman|Madronich|Garcia|2021}}</ref> It is estimated that the agreement has been more effective at curbing greenhouse gas emissions than the Kyoto Protocol specifically designed to do so.<ref>{{harvnb|Goyal|England|Sen Gupta|Jucker|2019}}; {{harvnb|Velders|Andersen|Daniel|Fahey|McFarland|2007}}</ref> The most recent amendment to the Montreal Protocol, the 2016 ], committed to reducing the emissions of ]s, which served as a replacement for banned ozone-depleting gases and are also potent greenhouse gases.<ref>{{harvnb|Carbon Brief, 21 November|2017}}</ref> Should countries comply with the amendment, a warming of 0.3&nbsp;°C–0.5&nbsp;°C is estimated to be avoided.<ref>{{harvnb|WMO SAOD Executive Summary|2022|p=15}}; {{harvnb|Velders|Daniel|Montzka|Vimont|Rigby|Krummel|Muhle|O'Doherty|Prinn,|Weiss|Young|2022}}</ref>
			=== National responses ===
			]. This measures fossil fuel and industry emissions. ] is not included.<ref>{{cite web |url=https://ourworldindata.org/grapher/annual-co-emissions-by-region |title=Annual {{CO2}} emissions by world region |website=ourworldindata.org |publisher=] |format=chart|access-date=2024-09-18}}</ref>]]
			In 2019, the ] became the first national government to declare a climate emergency.<ref>{{Harvnb|BBC, 1 May|2019}}; {{Harvnb|Vice, 2 May|2019}}.</ref> Other countries and ]s followed suit.<ref>{{harvnb|The Verge, 27 December|2019}}.</ref> That same year, the ] declared a "climate and environmental emergency".<ref>{{harvnb|The Guardian, 28 November|2019}}</ref> The ] presented its ] with the goal of making the EU carbon-neutral by 2050.<ref>{{harvnb|Politico, 11 December|2019}}.</ref> In 2021, the European Commission released its "]" legislation package, which contains guidelines for the ]; all new cars on the European market must be ] from 2035.<ref>{{cite news |title=European Green Deal: Commission proposes transformation of EU economy and society to meet climate ambitions |url=https://ec.europa.eu/commission/presscorner/detail/en/ip_21_3541 |work=] |date=14 July 2021}}</ref>
			Major countries in Asia have made similar pledges: South Korea and Japan have committed to become carbon-neutral by 2050, and China by 2060.<ref>{{harvnb|The Guardian, 28 October|2020}}</ref> While India has strong incentives for renewables, it also plans a significant expansion of coal in the country.<ref>{{cite web |date=15 September 2021 |title=India |url=https://climateactiontracker.org/countries/india/ |access-date=3 October 2021 |website=Climate Action Tracker}}</ref> Vietnam is among very few coal-dependent, fast-developing countries that pledged to phase out unabated coal power by the 2040s or as soon as possible thereafter.<ref>{{cite journal |last1=Do |first1=Thang Nam |last2=Burke |first2=Paul J. |title=Phasing out coal power in a developing country context: Insights from Vietnam |journal=Energy Policy |year=2023 |volume=176 |issue=May 2023 113512 |page=113512 |doi=10.1016/j.enpol.2023.113512|bibcode=2023EnPol.17613512D |s2cid=257356936 |hdl=1885/286612 |hdl-access=free }}</ref>
			As of 2021, based on information from 48 ], which represent 40% of the parties to the Paris Agreement, estimated total greenhouse gas emissions will be 0.5% lower compared to 2010 levels, below the 45% or 25% reduction goals to limit global warming to 1.5&nbsp;°C or 2&nbsp;°C, respectively.<ref>{{harvnb|UN NDC Synthesis Report|2021|pp=4–5}}; {{cite news |author=UNFCCC Press Office |date=26 February 2021 |title=Greater Climate Ambition Urged as Initial NDC Synthesis Report Is Published |url=https://unfccc.int/news/greater-climate-ambition-urged-as-initial-ndc-synthesis-report-is-published |access-date=21 April 2021}}</ref>
			== Society ==
			=== Denial and misinformation ===
			{{Further|Climate change denial|Fossil fuels lobby}}
			] from short periods to falsely assert that global temperatures are not rising. Blue trendlines show short periods that mask longer-term warming trends (red trendlines). Blue rectangle with blue dots shows the so-called ].{{sfn|Stover|2014}}]]
			Public debate about climate change has been strongly affected by climate change denial and ], which originated in the United States and has since spread to other countries, particularly Canada and Australia. Climate change denial has originated from fossil fuel companies, industry groups, ] think tanks, and ] scientists.<ref>{{harvnb|Dunlap|McCright|2011|pp=144, }}; {{harvnb|Björnberg|Karlsson|Gilek|Hansson|2017}}</ref> ], the main strategy of these groups has been to manufacture doubt about climate-change related scientific data and results.<ref>{{harvnb|Oreskes|Conway|2010}}; {{harvnb|Björnberg|Karlsson|Gilek|Hansson|2017}}</ref> People who hold unwarranted doubt about climate change are called climate change "skeptics", although "contrarians" or "deniers" are more appropriate terms.<ref>{{harvnb|O'Neill|Boykoff|2010}}; {{harvnb|Björnberg|Karlsson|Gilek|Hansson|2017}}</ref>
			There are different variants of climate denial: some deny that warming takes place at all, some acknowledge warming but attribute it to natural influences, and some minimize the negative impacts of climate change.<ref name="Björnberg 2017">{{harvnb|Björnberg|Karlsson|Gilek|Hansson|2017}}</ref> Manufacturing uncertainty about the science later developed into a ]: creating the belief that there is significant uncertainty about climate change within the scientific community to delay policy changes.<ref>{{harvnb|Dunlap|McCright|2015|p=308}}.</ref> Strategies to promote these ideas include criticism of scientific institutions,<ref>{{harvnb|Dunlap|McCright|2011|p=146}}.</ref> and questioning the motives of individual scientists.<ref name="Björnberg 2017"/> An ] of climate-denying ] and media has further fomented misunderstanding of climate change.<ref>{{harvnb|Harvey|Van den Berg|Ellers|Kampen|2018}}</ref>
			=== Public awareness and opinion ===
			{{Further|Climate communication|Media coverage of climate change|Public opinion on climate change}}
			] |volume=37 |issue=4 |pages=183–184 |doi=10.1177/0270467619886266 |s2cid=213454806}}</ref><ref name=Lynas_2021/><ref>{{cite journal |last1=Myers |first1=Krista F. |last2=Doran |first2=Peter T. |last3=Cook |first3=John |last4=Kotcher |first4=John E. |last5=Myers |first5=Teresa A. |title=Consensus revisited: quantifying scientific agreement on climate change and climate expertise among Earth scientists 10 years later |journal=] |date=20 October 2021 |volume=16 |issue=10 |page=104030 |doi=10.1088/1748-9326/ac2774 |bibcode=2021ERL....16j4030M |s2cid=239047650 |doi-access=free }}</ref> found scientific consensus to range from 98.7 to 100%.]]
			Climate change came to international public attention in the late 1980s.<ref name="Weart">{{harvnb|Weart "The Public and Climate Change (since 1980)"}}</ref> Due to media coverage in the early 1990s, people often confused climate change with other environmental issues like ozone depletion.<ref name="Newell2006">{{harvnb|Newell|2006|p=80}}; {{harvnb|Yale Climate Connections, 2 November|2010}}</ref> ], the ] movie '']'' (2004) and the ] documentary '']'' (2006) focused on climate change.<ref name="Weart" />
			Significant regional, gender, age and political differences exist in both public concern for, and understanding of, climate change. More highly educated people, and in some countries, women and younger people, were more likely to see climate change as a serious threat.<ref>{{harvnb|Pew|2015|p=10}}.</ref> College biology textbooks from the 2010s featured less content on climate change compared to those from the preceding decade, with decreasing emphasis on solutions.<ref name=":0">{{Cite web |last1=Preston |first1=Caroline |last2=Hechinger |date=1 October 2023 |title=In Some Textbooks, Climate Change Content Is Few and Far Between |url=https://undark.org/2023/01/10/in-some-textbooks-climate-change-content-is-few-and-far-between/ |website=undark.org/}}</ref> Partisan gaps also exist in many countries,<ref>{{harvnb|Pew|2020|}}.</ref> and countries with high ] tend to be less concerned.<ref>{{harvnb|Pew|2015|p=15}}.</ref> Views on causes of climate change vary widely between countries.<ref>{{harvnb|Yale|2021|p=7}}.</ref> Concern has increased over time,<ref>{{harvnb|Pew|2020|}}; {{harvnb|UNDP|2024|pp=22–26}}</ref> and a majority of citizens in many countries now express a high level of worry about climate change, or view it as a global emergency.<ref>{{harvnb|Yale|2021|p=9}}; {{harvnb|UNDP|2021|p=15}}.</ref> Higher levels of worry are associated with stronger public support for policies that address climate change.<ref>{{harvnb|Smith|Leiserowitz|2013|p=943}}.</ref>
			==== Climate movement ====
			{{Main|Climate movement|Climate change litigation}}
			Climate protests demand that political leaders take action to prevent climate change. They can take the form of public demonstrations, ], lawsuits and other activities.<ref>{{harvnb|Gunningham|2018}}.</ref> Prominent demonstrations include the ]. In this initiative, young people across the globe have been protesting since 2018 by skipping school on Fridays, inspired by Swedish activist and then-teenager ].<ref>{{harvnb|The Guardian, 19 March|2019}}; {{harvnb|Boulianne|Lalancette|Ilkiw|2020}}.</ref> Mass ] actions by groups like ] have protested by disrupting roads and public transport.<ref>{{harvnb|Deutsche Welle, 22 June|2019}}.</ref>
			] is increasingly used as a tool to strengthen climate action from public institutions and companies. Activists also initiate lawsuits which target governments and demand that they take ambitious action or enforce existing laws on climate change.<ref>{{cite news |last=Connolly |first=Kate |date=29 April 2021 |title='Historic' German ruling says climate goals not tough enough |url=http://www.theguardian.com/world/2021/apr/29/historic-german-ruling-says-climate-goals-not-tough-enough |access-date=1 May 2021 |work=]}}</ref> Lawsuits against fossil-fuel companies generally seek compensation for ].<ref>{{harvnb|Setzer|Byrnes|2019}}.</ref>
			== History ==
			{{Broader|History of climate change science}}
			=== Early discoveries ===
			], March 1912, p. 341.</ref>]]
			Scientists in the 19th century such as ] began to foresee the effects of climate change.<ref name="Nord 2020 p. 51">{{cite book |last=Nord |first=D. C. |url=https://books.google.com/books?id=KmMGEAAAQBAJ&pg=PA51 |title=Nordic Perspectives on the Responsible Development of the Arctic: Pathways to Action |publisher=Springer International Publishing |year=2020 |isbn=978-3-030-52324-4 |series=Springer Polar Sciences |page=51 |access-date=11 March 2023}}</ref><ref name="Mukherjee Scanlon Aureli Langan 2020 p. 331">{{cite book |last1=Mukherjee |first1=A. |url=https://books.google.com/books?id=17vbDwAAQBAJ&pg=PA331 |title=Global Groundwater: Source, Scarcity, Sustainability, Security, and Solutions |last2=Scanlon |first2=B. R. |last3=Aureli |first3=A. |last4=Langan |first4=S. |last5=Guo |first5=H. |last6=McKenzie |first6=A. A. |publisher=Elsevier Science |year=2020 |isbn=978-0-12-818173-7 |page=331 |access-date=11 March 2023}}</ref><ref name="von Humboldt Wulf 2018 p. 10">{{cite book | last1=von Humboldt | first1=A. | last2=Wulf | first2=A. | title=Selected Writings of Alexander von Humboldt: Edited and Introduced by Andrea Wulf | publisher=Knopf Doubleday Publishing Group | series=Everyman's Library Classics Series | year=2018 | isbn=978-1-101-90807-5 | url=https://books.google.com/books?id=xal2DwAAQBAJ&pg=PR10 | access-date=11 March 2023 | page=10}}</ref><ref name="Erdkamp Manning Verboven 2021 p. 6">{{cite book |last1=Erdkamp |first1=Paul |url=https://books.google.com/books?id=ZbdMEAAAQBAJ&pg=PR6 |title=Climate Change and Ancient Societies in Europe and the Near East: Diversity in Collapse and Resilience |last2=Manning |first2=Joseph G. |author-link2=Joseph Manning (historian) |last3=Verboven |first3=Koenraad |publisher=Springer International Publishing |year=2021 |isbn=978-3-030-81103-7 |series=Palgrave Studies in Ancient Economies |page=6 |access-date=11 March 2023}}</ref> In the 1820s, ] proposed the greenhouse effect to explain why Earth's temperature was higher than the Sun's energy alone could explain. Earth's atmosphere is transparent to sunlight, so sunlight reaches the surface where it is converted to heat. However, the atmosphere is not transparent to heat radiating from the surface, and captures some of that heat, which in turn warms the planet.<ref>{{harvnb|Archer|Pierrehumbert|2013|pp=}}</ref>
			In 1856 ] demonstrated that the warming effect of the Sun is greater for air with water vapour than for dry air, and that the effect is even greater with carbon dioxide ({{co2}}). She concluded that "An atmosphere of that gas would give to our earth a high temperature..."<ref>{{cite journal |url=https://books.google.com/books?id=6xhFAQAAMAAJ&pg=PA382 |last=Foote |first=Eunice |title=Circumstances affecting the Heat of the Sun's Rays |journal=The American Journal of Science and Arts |date=November 1856 |volume=22 |pages=382–383 |access-date=31 January 2016 |via=]}}</ref><ref>{{harvnb|Huddleston|2019}}</ref>
			] measured how much various gases in a tube absorb and emit infrared radiation—which humans experience as heat.]]
			Starting in 1859,<ref>{{harvnb|Tyndall|1861}}.</ref> ] established that nitrogen and oxygen—together totalling 99% of dry air—are transparent to radiated heat. However, water vapour and gases such as methane and carbon dioxide absorb radiated heat and re-radiate that heat into the atmosphere. Tyndall proposed that changes in the concentrations of these gases may have caused climatic changes in the past, including ]s.<ref>{{harvnb|Archer|Pierrehumbert|2013|pp=}}; {{harvnb|Fleming|2008|loc=}}</ref>
			] noted that water vapour in air continuously varied, but the {{co2}} concentration in air was influenced by long-term geological processes. Warming from increased {{co2}} levels would increase the amount of water vapour, amplifying warming in a positive feedback loop. In 1896, he published the first ] of its kind, projecting that halving {{co2}} levels could have produced a drop in temperature initiating an ice age. Arrhenius calculated the temperature increase expected from doubling {{co2}} to be around 5–6&nbsp;°C.{{sfn|Lapenis|1998}} Other scientists were initially sceptical and believed that the greenhouse effect was saturated so that adding more {{co2}} would make no difference, and that the climate would be self-regulating.<ref name="Weart The Carbon Dioxide Greenhouse Effect">{{harvnb|Weart "The Carbon Dioxide Greenhouse Effect"}}; {{harvnb|Fleming|2008|loc=}}</ref> Beginning in 1938, ] published evidence that climate was warming and {{co2}} levels were rising,<ref>{{harvnb|Callendar|1938}}; {{harvnb|Fleming|2007}}.</ref> but his calculations met the same objections.<ref name="Weart The Carbon Dioxide Greenhouse Effect" />
			=== Development of a scientific consensus ===
			{{see also|Scientific consensus on climate change}}
			] |volume=11 |issue=4 |page=048002 |bibcode= 2016ERL....11d8002C |doi= 10.1088/1748-9326/11/4/048002 |doi-access=free|hdl=1983/34949783-dac1-4ce7-ad95-5dc0798930a6 |hdl-access=free }}</ref> A 2019 study found scientific consensus to be at 100%,<ref name="Powell2019" /> and a 2021 study concluded that consensus exceeded 99%.<ref name="Lynas2021" /> Another 2021 study found that 98.7% of climate experts indicated that the Earth is getting warmer mostly because of human activity.<ref name="Myers2021">{{cite journal |last1=Myers |first1=Krista F. |last2= Doran |first2=Peter T. |last3=Cook |first3=John |last4=Kotcher |first4=John E. |last5=Myers |first5=Teresa A. |title=Consensus revisited: quantifying scientific agreement on climate change and climate expertise among Earth scientists 10 years later |journal= ] |date=20 October 2021 |volume=16 |issue=10 |page=104030 |doi= 10.1088/1748-9326/ac2774 |bibcode= 2021ERL....16j4030M |s2cid= 239047650 |doi-access=free}}</ref>]]
			In the 1950s, ] created a detailed computer model that included different atmospheric layers and the infrared spectrum. This model predicted that increasing {{co2}} levels would cause warming. Around the same time, ] found evidence that {{co2}} levels had been rising, and ] showed that the oceans would not absorb the increase. The two scientists subsequently helped ] to begin a record of continued increase, which has been termed the "]".<ref name="Weart The Carbon Dioxide Greenhouse Effect" /> Scientists alerted the public,<ref>{{harvnb|Weart "Suspicions of a Human-Caused Greenhouse (1956–1969)"}}</ref> and the dangers were highlighted at James Hansen's 1988 Congressional testimony.<ref name="history.aip.org2"/> The ] (IPCC), set up in 1988 to provide formal advice to the world's governments, spurred ].<ref>{{harvnb|Weart|2013|p=3567}}.</ref> As part of the ], scientists assess the scientific discussion that takes place in ] ] articles.<ref>{{harvnb|Royal Society|2005}}.</ref>
			There is a near-complete scientific consensus that the climate is warming and that this is caused by human activities. As of 2019, agreement in recent literature reached over 99%.<ref name="Powell2019">{{cite journal |last1=Powell |first1=James |date=20 November 2019 |title=Scientists Reach 100% Consensus on Anthropogenic Global Warming |url=https://journals.sagepub.com/doi/abs/10.1177/0270467619886266?journalCode=bsta |journal=] |volume=37 |issue=4 |pages=183–184 |doi=10.1177/0270467619886266 |access-date=15 November 2020 |s2cid=213454806}}</ref><ref name="Lynas2021">{{Cite journal |last1=Lynas |first1=Mark |last2=Houlton |first2=Benjamin Z |last3=Perry |first3=Simon |year=2021 |title=Greater than 99% consensus on human caused climate change in the peer-reviewed scientific literature |journal=] |volume=16 |issue=11 |pages=114005 |bibcode=2021ERL....16k4005L |doi=10.1088/1748-9326/ac2966 |issn=1748-9326 |s2cid=239032360|doi-access=free }}</ref> No scientific body of national or international standing ].<ref>{{harvnb|National Academies|2008|p=2}}; {{harvnb|Oreskes|2007|p=}}; {{Harvnb|Gleick, 7 January|2017}}</ref> Consensus has further developed that some form of action should be taken to protect people against the impacts of climate change. National science academies have called on world leaders to cut global emissions.<ref>Joint statement of the {{harvtxt|G8+5 Academies|2009}}; {{harvnb|Gleick, 7 January|2017}}.</ref> The 2021 IPCC Assessment Report stated that it is "unequivocal" that climate change is caused by humans.<ref name="Lynas2021"/>
			== See also ==
			<!-- Please note that the Manual of Style advices a minimum (or no) items in this sections for featured articles. -->
			* {{portal-inline|Climate change}}
			* ] – proposed geological time interval in which humans are having significant geological impact
			* ]
			* ]
			{{clear right}}
			== References ==
			{{reflist|22em}}
			=== Sources ===
			{{Free-content attribution
			| title = The status of women in agrifood systems – Overview
			| author = FAO
			| publisher = FAO
			| page numbers =
			| source =
			| documentURL = https://doi.org/10.4060/cc5060en
			| licence statement URL = https://commons.wikimedia.org/File:The_status_of_women_in_agrifood_systems_-_Overview.pdf
			| license = CC BY-SA 3.0
			}}
			==== IPCC reports ====
			{{refbegin}}
			'''Fourth Assessment Report'''
			<!-- Short-cite {{harvnb|IPCC AR4 WG1|2007}} links to this citation. -->
			* {{cite book |ref={{harvid|IPCC AR4 WG1|2007}}
			|author=IPCC |author-link=IPCC
			|year =2007
			|title=Climate Change 2007: The Physical Science Basis
			|series=Contribution of Working Group I to the ] of the Intergovernmental Panel on Climate Change
			|display-editors=4
			|editor-first1=S. |editor-last1=Solomon
			|editor-first2=D. |editor-last2=Qin
			|editor-first3=M. |editor-last3=Manning
			|editor-first4=Z. |editor-last4=Chen
			|editor-first5=M. |editor-last5=Marquis
			|editor-first6=K. B. |editor-last6=Averyt
			|editor-first7=M. |editor-last7=Tignor
			|editor-first8=H. L. |editor-last8=Miller
			|publisher=]
			|url=http://www.ipcc.ch/publications_and_data/ar4/wg1/en/contents.html
			|isbn=978-0-521-88009-1
			}}
			<!-- # -->
			** {{cite book |ref={{harvid|IPCC AR4 WG1 Ch1|2007}}
			|chapter=Chapter 1: Historical Overview of Climate Change Science
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar4/wg1/ar4-wg1-chapter1.pdf
			|year=2007
			|display-authors=4
			|first1=H. |last1=Le Treut
			|first2=R. |last2=Somerville
			|first3=U. |last3=Cubasch
			|first4=Y. |last4=Ding
			|first5=C. |last5=Mauritzen
			|first6=A. |last6=Mokssit
			|first7=T. |last7=Peterson
			|first8=M. |last8=Prather
			|title={{Harvnb|IPCC AR4 WG1|2007}}
			|pages=93–127
			}}
			** {{cite book |ref={{harvid|IPCC AR4 WG1 Ch8|2007}}
			|chapter=Chapter 8: Climate Models and their Evaluation
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar4/wg1/ar4-wg1-chapter8.pdf
			|year=2007
			|display-authors=4
			|first1=D. A. |last1=Randall
			|first2=R. A. |last2=Wood
			|first3=S. |last3=Bony
			|first4=R. |last4=Colman
			|first5=T. |last5=Fichefet
			|first6=J. |last6=Fyfe
			|first7=V. |last7=Kattsov
			|first8=A. |last8=Pitman
			|first9=J. |last9=Shukla
			|first10=J. |last10=Srinivasan
			|first11=R. J. |last11=Stouffer
			|first12=A. |last12=Sumi
			|first13=K. E. |last13=Taylor
			|title={{Harvnb|IPCC AR4 WG1|2007}}
			|pages=589–662
			}}
			** {{cite book |ref={{harvid|IPCC AR4 WG1 Ch9|2007}}
			|chapter=Chapter 9: Understanding and Attributing Climate Change
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar4/wg1/ar4-wg1-chapter9.pdf
			|year=2007
			|display-authors=4
			|first1=G. C. |last1=Hegerl
			|first2=F. W. |last2=Zwiers
			|first3=P. |last3=Braconnot |author-link3=Pascale Braconnot
			|first4=N. P. |last4=Gillett
			|first5=Y. |last5=Luo
			|first6=J. A. |last6=Marengo Orsini
			|first7=N. |last7=Nicholls
			|first8=J. E. |last8=Penner
			|first9=P. A. |last9=Stott
			|title={{Harvnb|IPCC AR4 WG1|2007}}
			|pages=663–745
			}}
			<!-- Short-cite {{harvnb|IPCC AR4 WG2|2007}} links to this citation. -->
			* {{cite book |ref={{harvid|IPCC AR4 WG2|2007}}
			|author=IPCC |author-link=IPCC
			|year =2007
			|title=Climate Change 2007: Impacts, Adaptation and Vulnerability
			|series=Contribution of Working Group II to the ] of the Intergovernmental Panel on Climate Change
			|display-editors=4
			|editor-first1=M. L. |editor-last1=Parry
			|editor-first2=O. F. |editor-last2=Canziani
			|editor-first3=J. P. |editor-last3=Palutikof
			|editor-first4=P. J. |editor-last4=van der Linden
			|editor-first5=C. E. |editor-last5=Hanson
			|publisher=]
			|url=http://www.ipcc.ch/publications_and_data/ar4/wg2/en/contents.html
			|isbn=978-0-521-88010-7
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC AR4 WG2 Ch19|2007}}
			|chapter=Chapter 19: Assessing key vulnerabilities and the risk from climate change
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar4/wg2/ar4-wg2-chapter19.pdf
			|year=2007
			|display-authors=4
			|first1=S. H. |last1=Schneider
			|first2=S. |last2=Semenov
			|first3=A. |last3=Patwardhan
			|first4=I. |last4=Burton
			|first5=C. H. D. |last5=Magadza
			|first6=M. |last6=Oppenheimer
			|first7=A. B. |last7=Pittock
			|first8=A. |last8=Rahman
			|first9=J. B. |last9=Smith
			|first10=A. |last10=Suarez
			|first11=F. |last11=Yamin
			|title={{Harvnb|IPCC AR4 WG2|2007}}
			|pages=779–810
			}}
			<!-- Short-cite {{harvnb|IPCC AR4 WG3|2007}} links to this citation. -->
			* {{cite book |ref={{harvid|IPCC AR4 WG3|2007}}
			|author=IPCC |author-link=IPCC
			|year =2007
			|title=Climate Change 2007: Mitigation of Climate Change
			|series=Contribution of Working Group III to the ] of the Intergovernmental Panel on Climate Change
			|display-editors=4
			|editor-first1=B. |editor-last1=Metz
			|editor-first2=O. R. |editor-last2=Davidson
			|editor-first3=P. R. |editor-last3=Bosch
			|editor-first4=R. |editor-last4=Dave
			|editor-first5=L. A. |editor-last5=Meyer
			|publisher=]
			|url=http://www.ipcc.ch/publications_and_data/ar4/wg3/en/contents.html
			|isbn=978-0-521-88011-4
			}}
			** {{cite book |ref={{harvid|IPCC AR4 WG3 Ch1|2007}}
			|chapter=Chapter 1: Introduction
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar4/wg3/ar4-wg3-chapter1.pdf
			|year=2007
			|display-authors=4
			|first1=H.-H.|last1=Rogner
			|first2=D. |last2=Zhou
			|first3=R. |last3=Bradley
			|first4=P. |last4=Crabbé
			|first5=O. |last5=Edenhofer
			|first6=B. |last6=Hare
			|first7=L. |last7=Kuijpers
			|first8=M. |last8=Yamaguchi
			|title={{Harvnb|IPCC AR4 WG3|2007}}
			|pages=95–116
			}}
			<!-- =========AR5================== -->
			'''Fifth Assessment report'''
			* {{cite book |ref={{harvid|IPCC AR5 WG1|2013}}<!-- ipcc:20200215 -->
			|author=IPCC |author-link=IPCC
			|year=2013
			|title=Climate Change 2013: The Physical Science Basis
			|series=Contribution of Working Group I to the ] of the Intergovernmental Panel on Climate Change
			|display-editors=4
			|editor1-first=T. F. |editor1-last=Stocker
			|editor2-first=D. |editor2-last=Qin
			|editor3-first=G.-K. |editor3-last=Plattner
			|editor4-first=M. |editor4-last=Tignor
			|editor5-first=S. K. |editor5-last=Allen
			|editor6-first=J. |editor6-last=Boschung
			|editor7-first=A. |editor7-last=Nauels
			|editor8-first=Y. |editor8-last=Xia
			|editor9-first=V. |editor9-last=Bex
			|editor10-first=P. M. |editor10-last=Midgley
			|publisher=]
			|place=Cambridge, UK & New York
			|isbn=978-1-107-05799-9 <!-- ISBN in printed source is incorrect. -->
			|url=http://www.climatechange2013.org/images/report/WG1AR5_ALL_FINAL.pdf <!-- Same file, new url per IPCC. -->
			}}.
			** {{cite book |ref={{harvid|IPCC AR5 WG1 Summary for Policymakers|2013}}
			|chapter=Summary for Policymakers
			|chapter-url=https://ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_SPM_FINAL.pdf
			|year=2013
			|author=IPCC |author-link=IPCC
			|title={{Harvnb|IPCC AR5 WG1|2013}}
			}}
			** {{cite book |ref={{harvid|IPCC AR5 WG1 Ch2|2013}}
			|chapter=Chapter 2: Observations: Atmosphere and Surface
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/2017/09/WG1AR5_Chapter02_FINAL.pdf
			|year=2013
			|display-authors=4
			|first1=D. L. |last1=Hartmann
			|first2=A. M. G. |last2=Klein Tank
			|first3=M. |last3=Rusticucci
			|first4=L. V. |last4=Alexander
			|first5=S. |last5=Brönnimann
			|first6=Y. |last6=Charabi
			|first7=F. J. |last7=Dentener
			|first8=E. J. |last8=Dlugokencky
			|first9=D. R. |last9=Easterling
			|first10=A. |last10=Kaplan
			|first11=B. J. |last11=Soden
			|first12=P. W. |last12=Thorne
			|first13=M. |last13=Wild
			|first14=P. M. |last14=Zhai
			|title={{Harvnb|IPCC AR5 WG1|2013}}
			|pages=159–254
			}}
			** {{cite book |ref={{harvid|IPCC AR5 WG1 Ch3|2013}}
			|chapter=Chapter 3: Observations: Ocean
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/2018/02/WG1AR5_Chapter03_FINAL.pdf
			|year=2013
			|display-authors=4
			|first1=M. |last1=Rhein
			|first2=S. R. |last2=Rintoul
			|first3=S. |last3=Aoki
			|first4=E. |last4=Campos
			|first5=D. |last5=Chambers
			|first6=R. A. |last6=Feely
			|first7=S. |last7=Gulev
			|first8=G. C. |last8=Johnson
			|first9=S. A. |last9=Josey
			|first10=A. |last10=Kostianoy
			|first11=C. |last11=Mauritzen
			|first12=D. |last12=Roemmich
			|first13=L. D. |last13=Talley
			|first14=F. |last14=Wang
			|title={{Harvnb|IPCC AR5 WG1|2013}}
			|pages=255–315
			}}
			** {{cite book |ref= {{harvid|IPCC AR5 WG1 Ch5|2013}}
			|chapter=Chapter 5: Information from Paleoclimate Archives
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/2018/02/WG1AR5_Chapter05_FINAL.pdf
			|year=2013
			|display-authors=4
			|first1=V. |last1=Masson-Delmotte
			|first2=M. |last2=Schulz
			|first3=A. |last3=Abe-Ouchi
			|first4=J. |last4=Beer
			|first5=A. |last5=Ganopolski
			|first6=J. F. |last6=González Rouco
			|first7=E. |last7=Jansen
			|first8=K. |last8=Lambeck
			|first9=J. |last9=Luterbacher
			|first10=T. |last10=Naish
			|first11=T. |last11=Osborn
			|first12=B. |last12=Otto-Bliesner
			|first13=T. |last13=Quinn
			|first14=R. |last14=Ramesh
			|first15=M. |last15=Rojas
			|first16=X. |last16=Shao
			|first17=A. |last17=Timmermann
			|title={{Harvnb|IPCC AR5 WG1|2013}}
			|pages=383–464
			}}
			** {{cite book |ref={{harvid|IPCC AR5 WG1 Ch10|2013}}
			|chapter=Chapter 10: Detection and Attribution of Climate Change: from Global to Regional
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/2018/02/WG1AR5_Chapter10_FINAL.pdf
			|year=2013
			|display-authors=4
			|first1=N. L. |last1=Bindoff
			|first2=P. A. |last2=Stott
			|first3=K. M. |last3=AchutaRao
			|first4=M. R. |last4=Allen
			|first5=N. |last5=Gillett
			|first6=D. |last6=Gutzler
			|first7=K. |last7=Hansingo
			|first8=G. |last8=Hegerl
			|first9=Y. |last9=Hu
			|first10=S. |last10=Jain
			|first11=I. I. |last11=Mokhov
			|first12=J. |last12=Overland
			|first13=J. |last13=Perlwitz
			|first14=R. |last14=Sebbari
			|first15=X. |last15=Zhang
			|title={{Harvnb|IPCC AR5 WG1|2013}}
			|pages=867–952
			}}
			** {{cite book |ref={{harvid|IPCC AR5 WG1 Ch12|2013}}
			|chapter=Chapter 12: Long-term Climate Change: Projections, Commitments and Irreversibility
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_Chapter12_FINAL.pdf
			|year=2013
			|display-authors=4
			|first1=M. |last1=Collins
			|first2=R. |last2=Knutti
			|first3=J. M. |last3=Arblaster
			|first4=J.-L. |last4=Dufresne
			|first5=T. |last5=Fichefet
			|first6=P. |last6=Friedlingstein
			|first7=X. |last7=Gao
			|first8=W. J. |last8=Gutowski
			|first9=T. |last9=Johns
			|first10=G. |last10=Krinner
			|first11=M. |last11=Shongwe
			|first12=C. |last12=Tebaldi
			|first13=A. J. |last13=Weaver
			|first14=M. |last14=Wehner
			|pages=1029–1136
			|title={{Harvnb|IPCC AR5 WG1|2013}}
			}}
			<!----------------AR5 Working Group II Report -->
			{{anchor|{{harvid|IPCC AR5 WG2|2014}}}} <!-- For the entire AR5 WG2 report -->
			* {{cite book |ref={{harvid|IPCC AR5 WG2 A|2014}}
			|author=IPCC |author-link=IPCC
			|year=2014
			|title=Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part A: Global and Sectoral Aspects
			|series=Contribution of Working Group II to the ] of the Intergovernmental Panel on Climate Change
			|display-editors=4
			|editor-first1=C. B. |editor-last1=Field
			|editor-first2=V. R. |editor-last2=Barros
			|editor-first3=D. J. |editor-last3=Dokken
			|editor-first4=K. J. |editor-last4=Mach
			|editor-first5=M. D. |editor-last5=Mastrandrea
			|editor-first6=T. E. |editor-last6=Bilir
			|editor-first7=M. |editor-last7=Chatterjee
			|editor-first8=K. L. |editor-last8=Ebi
			|editor-first9=Y. O. |editor-last9=Estrada
			|editor-first10=R. C. |editor-last10=Genova
			|editor-first11=B. |editor-last11=Girma
			|editor-first12=E. S. |editor-last12=Kissel
			|editor-first13=A. N. |editor-last13=Levy
			|editor-first14=S. |editor-last14=MacCracken
			|editor-first15=P. R. |editor-last15=Mastrandrea
			|editor-first16=L. L. |editor-last16=White
			|publisher=]
			|isbn=978-1-107-05807-1
			|url=<!-- ** I haven't added AR5 urls yet as I have not determined which is best. -JJ -->
			}}. Chapters 1–20, SPM, and Technical Summary.
			** {{cite book |ref={{harvid|IPCC AR5 WG2 Ch13|2014}}
			|chapter=Chapter 13: Livelihoods and Poverty
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar5/wg2/WGIIAR5-Chap13_FINAL.pdf
			|display-authors=4
			|first1=L. |last1=Olsson
			|first2=M. |last2=Opondo
			|first3=P. |last3=Tschakert
			|first4=A. |last4=Agrawal
			|first5=S. H. |last5=Eriksen
			|first6=S. |last6=Ma
			|first7=L. N. |last7=Perch
			|first8=S. A. |last8=Zakieldeen
			|year=2014
			|title={{Harvnb|IPCC AR5 WG2 A|2014}}
			|pages=793–832
			}}
			** {{cite book |ref={{harvid|IPCC AR5 WG2 Ch18|2014}}
			|chapter=Chapter 18: Detection and Attribution of Observed Impacts
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar5/wg2/WGIIAR5-Chap18_FINAL.pdf
			|year=2014
			|display-authors=4
			|first1=W. |last1=Cramer
			|first2=G. W. |last2=Yohe
			|first3=M. |last3=Auffhammer
			|first4=C. |last4=Huggel
			|first5=U. |last5=Molau
			|first6=M. A. F. |last6=da Silva Dias
			|first7=A. |last7=Solow
			|first8=D. A. |last8=Stone
			|first9=L. |last9=Tibig
			|title={{Harvnb|IPCC AR5 WG2 A|2014}}
			|pages=979–1037
			}}
			** {{cite book |ref={{harvid|IPCC AR5 WG2 Ch19|2014}}
			|chapter=Chapter 19: Emergent Risks and Key Vulnerabilities
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar5/wg2/WGIIAR5-Chap19_FINAL.pdf
			|year=2014
			|display-authors=4
			|first1=M. |last1=Oppenheimer
			|first2=M. |last2=Campos
			|first3=R. |last3=Warren
			|first4=J. |last4=Birkmann
			|first5=G. |last5=Luber
			|first6=B. |last6=O'Neill
			|first7=K. |last7=Takahashi
			|title={{Harvnb|IPCC AR5 WG2 A|2014}}
			|pages=1039–1099
			}}
			* {{cite book |ref={{harvid|IPCC AR5 WG2 B|2014}}
			|author=IPCC |author-link=IPCC
			|year=2014
			|title=Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part B: Regional Aspects
			|series=Contribution of Working Group II to the ] of the Intergovernmental Panel on Climate Change
			|display-editors=4
			|editor-first1=V. R. |editor-last1=Barros
			|editor-first2=C. B. |editor-last2=Field
			|editor-first3=D. J. |editor-last3=Dokken
			|editor-first4=K. J. |editor-last4=Mach
			|editor-first5=M. D. |editor-last5=Mastrandrea
			|editor-first6=T. E. |editor-last6=Bilir
			|editor-first7=M. |editor-last7=Chatterjee
			|editor-first8=K. L. |editor-last8=Ebi
			|editor-first9=Y. O. |editor-last9=Estrada
			|editor-first10=R. C. |editor-last10=Genova
			|editor-first11=B. |editor-last11=Girma
			|editor-first12=E. S. |editor-last12=Kissel
			|editor-first13=A. N. |editor-last13=Levy
			|editor-first14=S. |editor-last14=MacCracken
			|editor-first15=P. R. |editor-last15=Mastrandrea
			|editor-first16=L.L |editor-last16=White
			|publisher=]
			|place=Cambridge, UK & New York
			|isbn=978-1-107-05816-3
			|url=https://www.ipcc.ch/site/assets/uploads/2018/02/WGIIAR5-PartB_FINAL.pdf
			}}. Chapters 21–30, Annexes, and Index.
			** {{cite book |ref={{harvid|IPCC AR5 WG2 Ch28|2014}}
			|chapter=Chapter 28: Polar Regions
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar5/wg2/WGIIAR5-Chap28_FINAL.pdf
			|display-authors=4
			|first1=J. N. |last1=Larsen
			|first2=O. A. |last2=Anisimov
			|first3=A. |last3=Constable
			|first4=A. B. |last4=Hollowed
			|first5=N. |last5=Maynard
			|first6=P. |last6=Prestrud
			|first7=T. D. |last7=Prowse
			|first8=J. M. R.|last8=Stone
			|year=2014
			|title={{Harvnb|IPCC AR5 WG2 B|2014}}
			|pages=1567–1612
			}}
			<!-- ------------------------------ -->
			* {{cite book |ref={{harvid|IPCC AR5 WG3|2014}}
			|author=IPCC |author-link=IPCC
			|year=2014
			|title=Climate Change 2014: Mitigation of Climate Change
			|series=Contribution of Working Group III to the ] of the Intergovernmental Panel on Climate Change
			|display-editors=4
			|editor-first1=O. |editor-last1=Edenhofer
			|editor-first2=R. |editor-last2=Pichs-Madruga
			|editor-first3=Y. |editor-last3=Sokona
			|editor-first4=E. |editor-last4=Farahani
			|editor-first5=S. |editor-last5=Kadner
			|editor-first6=K. |editor-last6=Seyboth
			|editor-first7=A. |editor-last7=Adler
			|editor-first8=I. |editor-last8=Baum
			|editor-first9=S. |editor-last9=Brunner
			|editor-first10=P. |editor-last10=Eickemeier
			|editor-first11=B. |editor-last11=Kriemann
			|editor-first12=J. |editor-last12=Savolainen
			|editor-first13=S. |editor-last13=Schlömer
			|editor-first14=C. |editor-last14=von Stechow
			|editor-first15=T. |editor-last15=Zwickel
			|editor-first16=J. C. |editor-last16=Minx
			|publisher=]
			|place=Cambridge, UK & New York, NY
			|isbn= 978-1-107-05821-7
	}}		}}
			<!-- ## -->
	*{{cite book
			** {{cite book |ref={{harvid|IPCC AR5 WG3 Ch9|2014}}
	| title = Financial Risks of Climate Change
			|chapter=Chapter 9: Buildings
	| author = Association of British Insurers
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar5/wg3/ipcc_wg3_ar5_chapter9.pdf
	| year= 2005-06
			|year=2014
	| url=http://www.abi.org.uk/Display/File/Child/552/Financial_Risks_of_Climate_Change.pdf
			|display-authors=4
	| format = ]
			|first1=O. |last1=Lucon
			|first2=D. |last2=Ürge-Vorsatz
			|first3=A. |last3=Ahmed
			|first4=H. |last4=Akbari
			|first5=P. |last5=Bertoldi
			|first6=L. |last6=Cabeza
			|first7=N. |last7=Eyre
			|first8=A. |last8=Gadgil
			|first9=L. D. |last9=Harvey
			|first10=Y. |last10=Jiang
			|first11=E. |last11=Liphoto
			|first12=S. |last12=Mirasgedis
			|first13=S. |last13=Murakami
			|first14=J. |last14=Parikh
			|first15=C. |last15=Pyke
			|first16=M. |last16=Vilariño
			|title={{Harvnb|IPCC AR5 WG3|2014}}
			}}
			** {{cite book |ref={{harvid|IPCC AR5 WG3 Annex III|2014}}
			|chapter=Annex III: Technology-specific Cost and Performance Parameters
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/2018/02/ipcc_wg3_ar5_annex-iii.pdf
			|year=2014
			|display-authors=4
			|first1=O. |last1=Edenhofer
			|first2=R. |last2=Pichs-Madruga
			|first3=Y. |last3=Sokona
			|first4=E. |last4=Farahani
			|first5=S. |last5=Kadner
			|first6=K. |last6=Seyboth
			|first7=A. |last7=Adler
			|first8=I. |last8=Baum
			|first9=S. |last9=Brunner
			|first10=P. |last10=Eickemeier
			|first11=B. |last11=Kriemann
			|first12=J. |last12=Savolainen
			|first13=S. |last13=Schlömer
			|first14=C. |last14=von Stechow
			|first15=T. |last15=Zwickel
			|first16=J.C. |last16=Minx
			|publisher=Cambridge University Press
			|location=Cambridge, United Kingdom and New York, NY, USA
			|title={{Harvnb|IPCC AR5 WG3|2014}}
			}}
			* {{cite book
			|author=IPCC AR5 SYR |author-link=IPCC
			|year=2014
			|title=Climate Change 2014: Synthesis Report
			|series=Contribution of Working Groups I, II and III to the ] of the Intergovernmental Panel on Climate Change
			|editor1=The Core Writing Team
			|editor-first2=R. K. |editor-last2=Pachauri
			|editor-first3=L. A. |editor-last3=Meyer
			|publisher=IPCC
			|place=Geneva, Switzerland
			|isbn=<!-- no isbn -->
			|url=https://www.ipcc.ch/report/ar5/syr/
			}}
			** {{cite book |ref={{harvid|IPCC AR5 SYR Summary for Policymakers|2014}}
			|chapter=Summary for Policymakers
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar5/syr/AR5_SYR_FINAL_SPM.pdf
			|year=2014
			|author=IPCC |author-link=IPCC
			|title={{Harvnb|IPCC AR5 SYR|2014}}
			}}
			** {{cite book |ref={{harvid|IPCC AR5 SYR Glossary|2014}}
			|chapter=Annex II: Glossary
			|chapter-url=https://archive.ipcc.ch/pdf/assessment-report/ar5/syr/AR5_SYR_FINAL_Annexes.pdf
			|year=2014
			|author=IPCC |author-link=IPCC
			|title={{Harvnb|IPCC AR5 SYR|2014}}
			}}
			<!-- =========SR15================== -->
			'''Special Report: Global Warming of 1.5&nbsp;°C'''
			* {{cite book |ref={{harvid|IPCC SR15|2018}} <!-- ipcc:20200312 -->
			|author=IPCC |author-link=IPCC
			|year=2018
			|title=Global Warming of 1.5&nbsp;°C. An IPCC Special Report on the impacts of global warming of 1.5&nbsp;°C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty
			|display-editors=4
			|editor-first1=V. |editor-last1=Masson-Delmotte
			|editor-first2=P. |editor-last2=Zhai
			|editor-first3=H.-O. |editor-last3=Pörtner
			|editor-first4=D. |editor-last4=Roberts
			|editor-first5=J. |editor-last5=Skea
			|editor-first6=P. R. |editor-last6=Shukla
			|editor-first7=A. |editor-last7=Pirani
			|editor-first8=W. |editor-last8=Moufouma-Okia
			|editor-first9=C. |editor-last9=Péan
			|editor-first10=R. |editor-last10=Pidcock
			|editor-first11=S. |editor-last11=Connors
			|editor-first12=J. B. R. |editor-last12=Matthews
			|editor-first13=Y. |editor-last13=Chen
			|editor-first14=X. |editor-last14=Zhou
			|editor-first15=M. I. |editor-last15=Gomis
			|editor-first16=E. |editor-last16=Lonnoy
			|editor-first17=T. |editor-last17=Maycock
			|editor-first18=M. |editor-last18=Tignor
			|editor-first19=T. |editor-last19=Waterfeld
			|publisher=]
			|isbn=<!-- not issued? -->
			|url=https://www.ipcc.ch/site/assets/uploads/sites/2/2019/06/SR15_Full_Report_High_Res.pdf
			}} Global Warming of 1.5 °C –.
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SR15 Summary for Policymakers|2018}} <!-- ipcc:20200312 -->
			|author=IPCC |author-link=IPCC
			|year=2018
			|chapter=Summary for Policymakers
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/sites/2/2019/05/SR15_SPM_version_report_HR.pdf
			|title={{Harvnb|IPCC SR15|2018}}
			|pages=3–24
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SR15 Ch1|2018}} <!-- ipcc:20200312 -->
			|year=2018
			|chapter=Chapter 1: Framing and Context
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/sites/2/2019/05/SR15_Chapter1_High_Res.pdf
			|display-authors=4
			|first1=M. R. |last1=Allen
			|first2=O. P. |last2=Dube
			|first3=W. |last3=Solecki
			|first4=F. |last4=Aragón-Durand
			|first5=W. |last5=Cramer
			|first6=S. |last6=Humphreys
			|first7=M. |last7=Kainuma
			|first8=J. |last8=Kala
			|first9=N. |last9=Mahowald
			|first10=Y. |last10=Mulugetta
			|first11=R. |last11=Perez
			|first12=M. |last12=Wairiu
			|first13=K. |last13=Zickfeld
			|title={{Harvnb|IPCC SR15|2018}}
			|pages=49–91
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SR15 Ch2|2018}} <!-- ipcc:20200312 -->
			|year=2018
			|chapter=Chapter 2: Mitigation Pathways Compatible with 1.5&nbsp;°C in the Context of Sustainable Development
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/sites/2/2019/05/SR15_Chapter2_High_Res.pdf
			|display-authors=4
			|first1=J. |last1=Rogelj |author1-link=Joeri Rogelj
			|first2=D. |last2=Shindell
			|first3=K. |last3=Jiang
			|first4=S. |last4=Fifta
			|first5=P. |last5=Forster
			|first6=V. |last6=Ginzburg
			|first7=C. |last7=Handa
			|first8=H. |last8=Kheshgi
			|first9=S. |last9=Kobayashi
			|first10=E. |last10=Kriegler
			|first11=L. |last11=Mundaca
			|first12=R. |last12=Séférian
			|first13=M. V. |last13=Vilariño
			|title={{Harvnb|IPCC SR15|2018}}
			|pages=93–174
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SR15 Ch3|2018}} <!-- ipcc:20200312 -->
			|year=2018
			|chapter=Chapter 3: Impacts of 1.5&nbsp;°C Global Warming on Natural and Human Systems
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/sites/2/2019/05/SR15_Chapter3_High_Res.pdf
			|display-authors=4
			|first1=O. |last1=Hoegh-Guldberg
			|first2=D. |last2=Jacob
			|first3=M. |last3=Taylor
			|first4=M. |last4=Bindi
			|first5=S. |last5=Brown
			|first6=I. |last6=Camilloni
			|first7=A. |last7=Diedhiou
			|first8=R. |last8=Djalante
			|first9=K. L. |last9=Ebi
			|first10=F. |last10=Engelbrecht
			|first11=J. |last11=Guiot
			|first12=Y. |last12=Hijioka
			|first13=S. |last13=Mehrotra
			|first14=A. |last14=Payne
			|first15=S. I.|last15=Seneviratne
			|first16=A. |last16=Thomas
			|first17=R. |last17=Warren
			|first18=G. |last18=Zhou
			|title={{Harvnb|IPCC SR15|2018}}
			|pages=175–311
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SR15 Ch4|2018}} <!-- ipcc:20200312 -->
			|year=2018
			|chapter=Chapter 4: Strengthening and Implementing the Global Response
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/sites/2/2019/05/SR15_Chapter4_High_Res.pdf
			|display-authors=4
			|first1=H. |last1=de Coninck
			|first2=A. |last2=Revi
			|first3=M. |last3=Babiker
			|first4=P. |last4=Bertoldi
			|first5=M. |last5=Buckeridge
			|first6=A. |last6=Cartwright
			|first7=W. |last7=Dong
			|first8=J. |last8=Ford
			|first9=S. |last9=Fuss
			|first10=J.-C. |last10=Hourcade
			|first11=D. |last11=Ley
			|first12=R. |last12=Mechler
			|first13=P. |last13=Newman
			|first14=A. |last14=Revokatova
			|first15=S. |last15=Schultz
			|first16=L. |last16=Steg
			|first17=T. |last17=Sugiyama
			|title={{Harvnb|IPCC SR15|2018}}
			|pages=313–443
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SR15 Ch5|2018}} <!-- ipcc:20200312 -->
			|year=2018
			|chapter=Chapter 5: Sustainable Development, Poverty Eradication and Reducing Inequalities
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/sites/2/2019/05/SR15_Chapter5_High_Res.pdf
			|display-authors=4
			|first1=J. |last1=Roy
			|first2=P. |last2=Tschakert
			|first3=H. |last3=Waisman
			|first4=S. |last4=Abdul Halim
			|first5=P. |last5=Antwi-Agyei
			|first6=P. |last6=Dasgupta
			|first7=B. |last7=Hayward
			|first8=M. |last8=Kanninen
			|first9=D. |last9=Liverman
			|first10=C. |last10=Okereke
			|first11=P. F. |last11=Pinho
			|first12=K. |last12=Riahi
			|first13=A. G. |last13=Suarez Rodriguez
			|title={{Harvnb|IPCC SR15|2018}}
			|pages=445–538
			}}
			<!-- =========SRCCL ============================ -->
			'''Special Report: Climate change and Land'''
			* {{cite book |ref={{harvid|IPCC SRCCL|2019}} <!-- ipcc:20200204 -->
			|author=IPCC |author-link=IPCC
			|display-editors=4
			|editor-first1=P. R. |editor-last1=Shukla
			|editor-first2=J. |editor-last2=Skea
			|editor-first3=E. |editor-last3=Calvo Buendia
			|editor-first4=V. |editor-last4=Masson-Delmotte
			|editor-first5=H.-O. |editor-last5=Pörtner
			|editor-first6=D. |editor-last6=C. Roberts
			|editor-first7=P. |editor-last7=Zhai
			|editor-first8=R. |editor-last8=Slade
			|editor-first9=S. |editor-last9=Connors
			|editor-first10=R. |editor-last10=van Diemen
			|editor-first11=M. |editor-last11=Ferrat
			|editor-first12=E. |editor-last12=Haughey
			|editor-first13=S. |editor-last13=Luz
			|editor-first14=S. |editor-last14=Neogi
			|editor-first15=M. |editor-last15=Pathak
			|editor-first16=J. |editor-last16=Petzold
			|editor-first17=J. |editor-last17=Portugal Pereira
			|editor-first18=P. |editor-last18=Vyas
			|editor-first19=E. |editor-last19=Huntley
			|editor-first20=K. |editor-last20=Kissick
			|editor-first21=M. |editor-last21=Belkacemi
			|editor-first22=J. |editor-last22=Malley
			|year=2019
			|title=IPCC Special Report on Climate Change, Desertification, Land Degradation, Sustainable Land Management, Food Security, and Greenhouse gas fluxes in Terrestrial Ecosystems
			|url=https://www.ipcc.ch/site/assets/uploads/2019/11/SRCCL-Full-Report-Compiled-191128.pdf
			|publisher=In press
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SRCCL Summary for Policymakers|2019}} <!-- ipcc:20200204 -->
			|chapter=Summary for Policymakers
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/sites/4/2019/12/02_Summary-for-Policymakers_SPM.pdf
			|author=IPCC |author-link=IPCC
			|year=2019
			|title={{Harvnb|IPCC SRCCL|2019}}
			|pages=3–34
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SRCCL Ch2|2019}} <!-- ipcc:20200204 -->
			|chapter=Chapter 2: Land-Climate Interactions
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/2019/11/05_Chapter-2.pdf
			|display-authors=4
			|first1=G. |last1=Jia
			|first2=E. |last2=Shevliakova
			|first3=P. E. |last3=Artaxo<!-- 'Artaxo-Netto'? -->
			|first4=N. |last4=De Noblet-Ducoudré
			|first5=R. |last5=Houghton
			|first6=J. |last6=House
			|first7=K. |last7=Kitajima
			|first8=C. |last8=Lennard
			|first9=A. |last9=Popp
			|first10=A. |last10=Sirin
			|first11=R. |last11=Sukumar
			|first12=L. |last12=Verchot
			|year=2019
			|title={{Harvnb|IPCC SRCCL|2019}}
			|pages=131–247
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SRCCL Ch5|2019}} <!-- ipcc:20200204 -->
			|chapter=Chapter 5: Food Security
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/2019/11/08_Chapter-5.pdf
			|display-authors=4
			|first1=C. |last1=Mbow
			|first2=C. |last2=Rosenzweig
			|first3=L. G. |last3=Barioni
			|first4=T. |last4=Benton
			|first5=M. |last5=Herrero
			|first6=M. V. |last6=Krishnapillai
			|first7=E. |last7=Liwenga
			|first8=P. |last8=Pradhan
			|first9=M. G. |last9=Rivera-Ferre
			|first10=T. |last10=Sapkota
			|first11=F. N. |last11=Tubiello
			|first12=Y. |last12=Xu
			|year=2019
			|title={{Harvnb|IPCC SRCCL|2019}}
			|pages=437–550
			}}
			<!-- =========SROCC ============================ -->
			'''Special Report: The Ocean and Cryosphere in a Changing Climate'''
			* {{cite book |ref={{harvid|IPCC SROCC|2019}} <!-- ipcc:20200202 -->
			|author=IPCC |author-link=IPCC
			|year=2019
			|display-editors=4
			|editor-first1=H.-O. |editor-last1=Pörtner
			|editor-first2=D. C. |editor-last2=Roberts
			|editor-first3=V. |editor-last3=Masson-Delmotte
			|editor-first4=P. |editor-last4=Zhai
			|editor-first5=M. |editor-last5=Tignor
			|editor-first6=E. |editor-last6=Poloczanska
			|editor-first7=K. |editor-last7=Mintenbeck
			|editor-first8=A. |editor-last8=Alegría
			|editor-first9=M. |editor-last9=Nicolai
			|editor-first10=A. |editor-last10=Okem
			|editor-first11=J. |editor-last11=Petzold
			|editor-first12=B. |editor-last12=Rama
			|editor-first13=N. |editor-last13=Weyer
			|title=IPCC Special Report on the Ocean and Cryosphere in a Changing Climate
			|publisher=In press
			|isbn=<!-- Not yet assigned -->
			|url=https://www.ipcc.ch/site/assets/uploads/sites/3/2019/12/SROCC_FullReport_FINAL.pdf
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SROCC Summary for Policymakers|2019}} <!-- ipcc:20200202 -->
			|chapter=Summary for Policymakers
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/sites/3/2019/11/03_SROCC_SPM_FINAL.pdf
			|author=IPCC |author-link=IPCC
			|year=2019
			|title={{Harvnb|IPCC SROCC|2019}}
			|pages=3–35
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SROCC Ch4|2019}} <!-- ipcc:20200202 -->
			|chapter=Chapter 4: Sea Level Rise and Implications for Low Lying Islands, Coasts and Communities
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/sites/3/2019/11/08_SROCC_Ch04_FINAL.pdf
			|display-authors=4
			|first1=M. |last1=Oppenheimer
			|first2=B. |last2=Glavovic
			|first3=J. |last3=Hinkel
			|first4=R. |last4=van de Wal
			|first5=A. K. |last5=Magnan
			|first6=A. |last6=Abd-Elgawad
			|first7=R. |last7=Cai
			|first8=M. |last8=Cifuentes-Jara
			|first9=R. M. |last9=Deconto
			|first10=T. |last10=Ghosh
			|first11=J. |last11=Hay
			|first12=F. |last12=Isla
			|first13=B. |last13=Marzeion
			|first14=B. |last14=Meyssignac
			|first15=Z. |last15=Sebesvari
			|year=2019
			|title={{Harvnb|IPCC SROCC|2019}}
			|pages=321–445
			}}
			<!-- ## -->
			** {{cite book |ref={{harvid|IPCC SROCC Ch5|2019}} <!-- ipcc:20200202 -->
			|chapter=Chapter 5: Changing Ocean, Marine Ecosystems, and Dependent Communities
			|chapter-url=https://www.ipcc.ch/site/assets/uploads/sites/3/2019/11/09_SROCC_Ch05_FINAL.pdf
			|display-authors=4
			|first1=N. L. |last1=Bindoff
			|first2=W. W. L. |last2=Cheung
			|first3=J. G. |last3=Kairo
			|first4=J. |last4=Arístegui
			|first5=V. A. |last5=Guinder
			|first6=R. |last6=Hallberg
			|first7=N. J. M. |last7=Hilmi
			|first8=N. |last8=Jiao
			|first9=Md S. |last9=Karim
			|first10=L. |last10=Levin
			|first11=S. |last11=O'Donoghue
			|first12=S. R. |last12=Purca Cuicapusa
			|first13=B. |last13=Rinkevich
			|first14=T. |last14=Suga
			|first15=A. |last15=Tagliabue
			|first16=P. |last16=Williamson
			|year=2019
			|title={{Harvnb|IPCC SROCC|2019}}
			|pages=447–587
			}}
			'''Sixth Assessment Report'''
			* {{Cite book |ref= {{harvid|IPCC AR6 WG1|2021}}
			|author= IPCC |author-link= IPCC
			|year= 2021
			|title= Climate Change 2021: The Physical Science Basis
			|series= Contribution of Working Group I to the ] of the Intergovernmental Panel on Climate Change
			|display-editors= 4
			|editor1-first=V. |editor1-last=Masson-Delmotte
			|editor2-first=P. |editor2-last=Zhai
			|editor3-first=A. |editor3-last=Pirani
			|editor4-first=S. L. |editor4-last=Connors
			|editor5-first=C. |editor5-last=Péan
			|editor6-first=S. |editor6-last=Berger
			|editor7-first=N. |editor7-last=Caud
			|editor8-first=Y. |editor8-last=Chen
			|editor9-first=L. |editor9-last=Goldfarb
			|editor10-first=M. I. |editor10-last=Gomis
			|publisher=] (In Press)
			|place=Cambridge, United Kingdom and New York, NY, US
			|url=https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_FullReport_small.pdf
			}}
			** {{Cite book |ref={{harvid|IPCC AR6 WG1 Summary for Policymakers|2021}}
			|chapter=Summary for Policymakers
			|chapter-url=https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_SPM_final.pdf
			|author=IPCC |author-link= IPCC
			|year=2021
			|title={{Harvnb|IPCC AR6 WG1|2021}}
	}}		}}
			** {{Cite book |ref={{harvid|IPCC AR6 WG1 Technical Summary|2021}}
	*{{cite journal
			|chapter=Technical Summary
	| last = Barnett | first = Tim P.
			|last1=Arias |first1=Paola A.
	| coauthors = J. C. Adam, D. P. Lettenmaier
			|last2=Bellouin |first2=Nicolas
	| date = ]
			|last3=Coppola |first3=Erika
	| title = Potential impacts of a warming climate on water availability in snow-dominated regions
			|last4=Jones |first4=Richard G.
	| journal = ]
			|last5=Krinner |first5=Gerhard
	| volume = 438 | issue = 7066 | pages = 303-309
			|display-authors=4
	| url = http://www.nature.com/nature/journal/v438/n7066/abs/nature04141.html
			|chapter-url=https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_TS.pdf
	| doi = 10.1038/nature04141
			|year=2021
	}}
			|title={{Harvnb|IPCC AR6 WG1|2021}}
	*{{cite journal
	| last= Behrenfeld | first= Michael J.
	| coauthors = Robert T. O'Malley, David A. Siegel, Charles R. McClain, Jorge L. Sarmiento, Gene C. Feldman, Allen G. Milligan, Paul G. Falkowski, Ricardo M. Letelier, Emanuel S. Boss
	| date = ]
	| title = Climate-driven trends in contemporary ocean productivity
	| journal = ]
	| volume = 444 | issue = 7120 | pages = 752-755.
	| url=http://www.icess.ucsb.edu/~davey/MyPapers/Behrenfeld_etal_2006_Nature.pdf
	| format = ]
	| doi=10.1038/nature05317
	}}		}}
			** {{Cite book
	*{{cite journal
			|ref= {{harvid|IPCC AR6 WG1 Ch2|2021}}
	| first = Onelack | last= Choi
			|chapter=Chapter 2: Changing state of the climate system
	| coauthors = Ann Fisher
			|last1 = Gulev| first1 = Sergey K.| last2 = Thorne| first2 = Peter W.| last3 = Ahn| first3 = Jinho| last4 = Dentener| first4 = Frank J.| last5 = Domingues| first5 = Catia M.| last6 = Gerland| first6 = Sebastian| last7 = Gong| first7 = Daoyi| last8 = Kaufman| first8 = Darrell S.| last9 = Nnamchi| first9 = Hyacinth C.| last10 = Quaas| first10 = Johannes| last11 = Rivera| first11 = Juan Antonio| last12 = Sathyendranath| first12 = Shubha| last13 = Smith| first13 = Sharon L.| last14 = Trewin| first14 = Blair| last15 = von Shuckmann| first15 = Karina| last16 = Vose| first16 = Russell S.
	| date = May 2005
			|title = Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change
	| title = The Impacts of Socioeconomic Development and Climate Change on Severe Weather Catastrophe Losses: Mid-Atlantic Region (MAR) and the U.S.
			|chapter-url= https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Chapter_02.pdf
	| journal = Climate Change
			|display-authors=4
	| volume = 58 | issu e= 1-2 | pages = 149-170
			|year=2021
	| doi = 10.1023/A:1023459216609
	| url = http://www.springerlink.com/content/m6308777613702q0/
	}}		}}
	*{{cite book		** {{Cite book
			|ref= {{harvid|IPCC AR6 WG1 Ch11|2021}}
	| last = Dyurgerov | first = Mark B.
			|chapter=Chapter 11: Weather and climate extreme events in a changing climate
	| coauthors = Mark F. Meier
			|last1=Seneviratne |first1=Sonia I.
	| year = 2005
			|last2=Zhang |first2=Xuebin
	| title = Glaciers and the Changing Earth System: a 2004 Snapshot
			|last3=Adnan |first3=M.
	| publisher = Institute of Arctic and Alpine Research Occasional Paper #58
			|last4=Badi |first4=W.
	| url = http://instaar.colorado.edu/other/download/OP58_dyurgerov_meier.pdf
			|last5=Dereczynski |first5=Claudine
	| format = ]
			|last6=Di Luca |first6=Alejandro
	| id = {{ISSN|0069-6145}}
			|last7=Ghosh |first7=S.
			|chapter-url=https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Chapter_11.pdf
			|display-authors=4
			|title= {{Harvnb|IPCC AR6 WG1|2021}}
			|year=2021
			}}
			* {{cite book
			|author=IPCC
			|ref={{harvid|IPCC AR6 WG2|2022}}
			|editor-last1=Pörtner |editor-first1=H.-O.
			|editor-last2=Roberts |editor-first2=D.C.
			|editor-last3=Tignor |editor-first3=M.
			|editor-last4=Poloczanska |editor-first4=E.S.
			|editor-last5=Mintenbeck |editor-first5=K.
			|editor-last6=Alegría |editor-first6=A.
			|editor-last7=Craig |editor-first7=M.
			|editor-last8=Langsdorf |editor-first8=S.
			|editor-last9=Löschke |editor-first9=S.
			|editor-last10=Möller |editor-first10=V.
			|editor-last11=Okem |editor-first11=A.
			|editor-last12=Rama |editor-first12=B.
			|url=https://www.ipcc.ch/report/ar6/wg2/
			|title=Climate Change 2022: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change
			|publisher=]
			|year=2022
			|doi=10.1017/9781009325844|isbn=978-1-009-32584-4
			}}
			** {{Cite book
			|ref={{harvid|IPCC AR6 WG2 SPM|2022}}
			|author=IPCC
			|chapter=Summary for Policymakers
			|chapter-url=https://www.ipcc.ch/report/ar6/wg2/downloads/report/IPCC_AR6_WGII_SummaryForPolicymakers.pdf
			|title= {{harvnb|IPCC AR6 WG2|2022}}
			|year=2022
			|pages=3–33
			|doi=10.1017/9781009325844.001
			|isbn=978-1-009-32584-4
			}}
			** {{Cite book
			|ref={{harvid|IPCC AR6 WG2 Technical Summary|2022}}
			|author=IPCC
			|chapter=Technical Summary
			|chapter-url=https://www.ipcc.ch/report/ar6/wg2/downloads/report/IPCC_AR6_WGII_TechnicalSummary.pdf
			|title= {{harvnb|IPCC AR6 WG2|2022}}
			|year=2022
			|pages=37–118
			|doi=10.1017/9781009325844.002
			|isbn=978-1-009-32584-4
			}}
			** {{Cite book
			|ref={{harvid|IPCC AR6 WG2 Ch5|2022}}
			|chapter=Food, Fibre and Other Ecosystem Products
			|chapter-url=https://www.ipcc.ch/report/ar6/wg2/downloads/report/IPCC_AR6_WGII_Chapter05.pdf
			|last1=Bezner Kerr |first1=R.
			|last2=Hasegawa |first2=T.
			|last3=Lasco |first3=R.
			|last4=Bhatt |first4=I.
			|last5=Deryng |first5=D.
			|last6=Farrell |first6=A.
			|last7=Gurney-Smith |first7=H.
			|last8=Ju |first8=H.
			|last9=Lluch-Cota |first9=S.
			|last10=Meza |first10=F.
			|last11=Nelson |first11=G.
			|last12=Neufeldt |first12=H.
			|last13=Thornton |first13=P.
			|title= {{harvnb|IPCC AR6 WG2|2022}}
			|year=2022
			|pages=713–906
			|doi=10.1017/9781009325844.007
			|isbn=978-1-009-32584-4
			}}
			** {{Cite book
			|ref={{harvid|IPCC AR6 WG2 Ch6|2022}}
			|chapter=Cities, Settlements and Key Infrastructure
			|chapter-url=https://www.ipcc.ch/report/ar6/wg2/downloads/report/IPCC_AR6_WGII_Chapter06.pdf
			|last1=Dodman |first1=D.
			|last2=Hayward |first2=B.
			|last3=Pelling |first3=M.
			|last4=Castan Broto |first4=V.
			|last5=Chow |first5=W.
			|last6=Chu |first6=E.
			|last7=Dawson |first7=R.
			|last8=Khirfan |first8=L.
			|last9=McPhearson |first9=T.
			|last10=Prakash |first10=A.
			|last11=Zheng |first11=Y.
			|last12=Ziervogel |first12=G.
			|title= {{harvnb|IPCC AR6 WG2|2022}}
			|year=2022
			|pages=907–1040
			|doi=10.1017/9781009325844.008
			|isbn=978-1-009-32584-4
			}}
			** {{Cite book
			|ref={{harvid|IPCC AR6 WG2 Ch16|2022}}
			|chapter=Key Risks across Sectors and Regions
			|chapter-url=https://www.ipcc.ch/report/ar6/wg2/downloads/report/IPCC_AR6_WGII_Chapter16.pdf
			|last1=O'Neill |first1=B.
			|last2=van Aalst |first2=M.
			|last3=Zaiton Ibrahim |first3=Z.
			|last4=Berrang Ford |first4=L.
			|last5=Bhadwal |first5=S.
			|last6=Buhaug |first6=H.
			|last7=Diaz |first7=D.
			|last8=Frieler |first8=K.
			|last9=Garschagen |first9=M.
			|last10=Magnan |first10=A.
			|last11=Midgley |first11=G.
			|last12=Mirzabaev |first12=A.
			|last13=Thomas |first13=A.
			|last14=Warren |first14=R.
			|title= {{harvnb|IPCC AR6 WG2|2022}}
			|year=2022
			|pages=2411–2538
			|doi=10.1017/9781009325844.025
			|isbn=978-1-009-32584-4
			}}
			* {{cite book
			|author=IPCC
			|ref={{harvid|IPCC AR6 WG3|2022}}
			|editor-last1=Shukla |editor-first1=P.R.
			|editor-last2=Skea |editor-first2=J.
			|display-editors=etal
			|url=https://www.ipcc.ch/report/ar6/wg3/
			|title=Climate Change 2022: Mitigation of Climate Change. Contribution of Working Group III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change
			|publisher=]
			|year=2022
			|location=Cambridge, UK and New York, NY, USA
			|doi=10.1017/9781009157926|isbn=978-1-009-15792-6
			}}
			** {{Cite book |ref={{harvid|IPCC AR6 WG3 Summary for Policymakers|2022}}
			|chapter=Summary for Policymakers
			|chapter-url=https://www.ipcc.ch/report/ar6/wg3/downloads/report/IPCC_AR6_WGIII_SummaryForPolicymakers.pdf
			|author=IPCC |author-link=IPCC
			|year=2022
			|title={{Harvnb|IPCC AR6 WG3|2022}}
	}}		}}
	*{{cite journal		** {{Cite book
			|ref={{harvid|IPCC AR6 WG3 Technical Summary|2022}}
	| last=Emanuel | first=Kerry A.
			|chapter=Technical Summary
	| authorlink=Kerry Emanuel
			|chapter-url=https://www.ipcc.ch/report/ar6/wg3/downloads/report/IPCC_AR6_WGIII_TechnicalSummary.pdf
	| date= ]
			|last1=Pathak |first1=M.
	| title=Increasing destructiveness of tropical cyclones over the past 30 years.
			|last2=Slade |first2=R.
	| journal= ]
			|last3=Shukla |first3=P.R.
	| volume=436 | issue=7051 | pages=686-688
			|last4=Skea |first4=J.
	| url=ftp://texmex.mit.edu/pub/emanuel/PAPERS/NATURE03906.pdf
			|last5=Pichs-Madruga |first5=R.
	| format = ]
			|last6=Ürge-Vorsatz |first6=D.
	| doi=10.1038/nature03906
			|title= {{harvnb|IPCC AR6 WG3|2022}}
			|year=2022
			|pages=51–148
			|doi=10.1017/9781009157926.002
			|isbn=978-1-009-15792-6
			}}
			** {{Cite book
			|ref={{harvid|IPCC AR6 WG3 Ch3|2022}}
			|chapter=Mitigation Pathways Compatible with Long-term Goals
			|chapter-url=https://www.ipcc.ch/report/ar6/wg3/downloads/report/IPCC_AR6_WGIII_Chapter03.pdf
			|last1=Riahi |first1=K.
			|last2=Schaeffer |first2=R.
			|last3=Arango |first3=J.
			|last4=Calvin |first4=K.
			|last5=Guivarch |first5=C.
			|last6=Hasegawa |first6=T.
			|last7=Jiang |first7=K.
			|last8=Kriegler |first8=E.
			|last9=Matthews |first9=R.
			|last10=Peters |first10=G.P.
			|last11=Rao |first11=A.
			|last12=Robertson |first12=S.
			|last13=Sebbit |first13=A.M.
			|last14=Steinberger |first14=J.
			|last15=Tavoni |first15=M.
			|last16=van Vuuren |first16=D.P.
			|title= {{harvnb|IPCC AR6 WG3|2022}}
			|year=2022
			|pages=295–408
			|doi=10.1017/9781009157926.005
			|isbn=978-1-009-15792-6
			}}
			* {{cite book
			|author=IPCC |title=Climate Change 2023: Synthesis Report. Contribution of Working Groups I, II and III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change
			|author-link=IPCC
			|ref={{harvid|IPCC AR6 SYR|2023}}
			|url=https://www.ipcc.ch/report/ar6/syr/downloads/report/IPCC_AR6_SYR_FullVolume.pdf
			|editor-last1=Core Writing Team |editor-last2=Lee |editor-first2=H.
			|editor-last3=Romero |editor-first3=J.
			|display-editors=etal
			|publisher=IPCC
			|year=2023
			|location=Geneva, Switzerland
			|isbn=978-92-9169-164-7
			|doi=10.59327/IPCC/AR6-9789291691647
			|hdl=1885/299630
			|s2cid=260074696
	}}		}}
			** {{Cite book
	*{{cite journal
			|ref={{harvid|IPCC AR6 SYR SPM|2023}}
	| last=Hansen | first=James
			|chapter=Summary for Policymakers
	| authorlink=James Hansen
			|chapter-url=https://report.ipcc.ch/ar6syr/pdf/IPCC_AR6_SYR_SPM.pdf
	| coauthors=Larissa Nazarenko, Reto Ruedy, Makiko Sato, Josh Willis, Anthony Del Genio, Dorothy Koch, Andrew Lacis, Ken Lo, Surabi Menon, Tica Novakov, Judith Perlwitz, Gary Russell, ], Nicholas Tausnev
			|author=IPCC |author-link=IPCC
	| date= ]
			|year=2023
	| title=Earth's Energy Imbalance: Confirmation and Implications
			|title={{Harvnb|IPCC AR6 SYR|2023}}
	| journal=]
	| volume=308 | issue=5727 | pages=1431-1435
	| url=http://pangea.stanford.edu/research/Oceans/GES205/Hansen_Science_Earth's%20Energy%20Balance.pdf
	| format = ]
	| doi=10.1126/science.1110252
	}}
	*{{cite journal
	| last= Hinrichs | first= Kai-Uwe
	| coauthors=Laura R. Hmelo, Sean P. Sylva
	| date=]
	| title = Molecular Fossil Record of Elevated Methane Levels in Late Pleistocene Coastal Waters
	| journal = ]
	| volume = 299
	| issue = 5610
	| pages = 1214-1217
	| doi= 10.1126/science.1079601
	}}		}}
			{{refend}}
	*{{cite news
	| last=Hirsch | first=Tim
			==== Other peer-reviewed sources ====
	| publisher=]
			{{refbegin|30em}}
	| url=http://news.bbc.co.uk/2/hi/science/nature/4604332.stm
			* {{cite journal |last1=Albrecht |first1=Bruce A. |s2cid=46152332 |title=Aerosols, Cloud Microphysics, and Fractional Cloudiness |journal=] |year=1989 |volume=245 |issue=4923 |pages=1227–1239 |bibcode=1989Sci...245.1227A |doi=10.1126/science.245.4923.1227 |pmid=17747885}}
	| title=Plants revealed as methane source
			* {{cite journal |last1=Balsari |first1=S. |last2=Dresser |first2=C. |last3=Leaning |first3=J. |title=Climate Change, Migration, and Civil Strife |journal=Curr Environ Health Report |year=2020 |volume=7 |issue=4 |pages=404–414 |pmid=33048318 |doi=10.1007/s40572-020-00291-4 |pmc=7550406 |bibcode=2020CEHR....7..404B}}
	| date=]
			* {{cite journal |last1=Bamber |first1=Jonathan L. |last2=Oppenheimer |first2=Michael |last3=Kopp |first3=Robert E. |last4=Aspinall |first4=Willy P. |last5=Cooke |first5=Roger M. |date=2019 |title=Ice sheet contributions to future sea-level rise from structured expert judgment |journal=] |volume=116 |issue=23 |pages=11195–11200 |doi=10.1073/pnas.1817205116 |issn=0027-8424 |pmid=31110015 |pmc=6561295 |bibcode=2019PNAS..11611195B |doi-access=free}}
			* {{cite journal |last1=Bednar |first1=Johannes |last2=Obersteiner |first2=Michael |last3=Wagner |first3=Fabian |year=2019 |title=On the financial viability of negative emissions |journal=] |volume=10 |issue=1 |page=1783 |doi=10.1038/s41467-019-09782-x |pmid=30992434 |pmc=6467865 |bibcode=2019NatCo..10.1783B |issn=2041-1723}}
			* {{cite journal |last1=Berrill |first1=P. |last2=Arvesen |first2=A. |last3=Scholz |first3=Y. |last4=Gils |first4=H. C. |last5=Hertwich |first5=E. |display-authors=4 |date=2016 |title=Environmental impacts of high penetration renewable energy scenarios for Europe |journal=] |volume=11 |issue=1 |page=014012 |doi=10.1088/1748-9326/11/1/014012 |bibcode=2016ERL....11a4012B |doi-access=free |hdl=11250/2465014 |hdl-access=free}}
			* {{cite journal |last1=Björnberg |first1=Karin Edvardsson |last2=Karlsson |first2=Mikael |last3=Gilek |first3=Michael |last4=Hansson |first4=Sven Ove |date=2017 |title=Climate and environmental science denial: A review of the scientific literature published in 1990–2015 |journal=Journal of Cleaner Production |volume=167 |pages=229–241 |doi=10.1016/j.jclepro.2017.08.066 |issn=0959-6526 |doi-access=free |bibcode=2017JCPro.167..229B}}
			* {{cite journal |last1=Boulianne |first1=Shelley |last2=Lalancette |first2=Mireille |last3=Ilkiw |first3=David |date=2020 |title="School Strike 4 Climate": Social Media and the International Youth Protest on Climate Change |url=https://www.cogitatiopress.com/mediaandcommunication/article/view/2768 |journal=Media and Communication |volume=8 |issue=2 |pages=208–218 |doi=10.17645/mac.v8i2.2768 |issn=2183-2439 |doi-access=free}}
			* {{cite journal |last1=Bui |first1=M. |last2=Adjiman |first2=C. |author-link2=Claire Adjiman |last3=Bardow |first3=A. |last4=Anthony |first4=Edward J. |display-authors=etal |date=2018 |title=Carbon capture and storage (CCS): the way forward |journal=] |volume=11 |issue=5 |pages=1062–1176 |doi=10.1039/c7ee02342a |doi-access=free |hdl=10044/1/55714 |hdl-access=free}}
			* {{cite journal |last1=Burke |first1=Claire |last2=Stott |first2=Peter |s2cid=59509210 |date=2017 |title=Impact of Anthropogenic Climate Change on the East Asian Summer Monsoon |journal=] |issn=0894-8755 |volume=30 |issue=14 |pages=5205–5220 |doi=10.1175/JCLI-D-16-0892.1 |bibcode=2017JCli...30.5205B |arxiv=1704.00563}}
			* {{cite journal |last1=Callendar |first1=G. S. |author-link=Guy Stewart Callendar |date=1938 |title=The artificial production of carbon dioxide and its influence on temperature |journal=] |volume=64 |issue=275 |pages=223–240 |bibcode=1938QJRMS..64..223C |doi=10.1002/qj.49706427503}}
			* {{cite journal |last1=Cattaneo |first1=Cristina |last2=Beine |first2=Michel |last3=Fröhlich |first3=Christiane J. |last4=Kniveton |first4=Dominic |display-authors=4 |last5=Martinez-Zarzoso |first5=Inmaculada |last6=Mastrorillo |first6=Marina |last7=Millock |first7=Katrin |last8=Piguet |first8=Etienne |last9=Schraven |first9=Benjamin |date=2019 |title=Human Migration in the Era of Climate Change |url=https://www.journals.uchicago.edu/doi/abs/10.1093/reep/rez008?journalCode=reep |journal=] |volume=13 |issue=2 |pages=189–206 |doi=10.1093/reep/rez008 |issn=1750-6816 |hdl=10.1093/reep/rez008 |s2cid=198660593 |hdl-access=free}}
			* {{cite journal |last1=Cohen |first1=Judah |last2=Screen |first2=James |last3=Furtado |first3=Jason C. |last4=Barlow |first4=Mathew |last5=Whittleston |first5=David |display-authors=4 |year=2014 |title=Recent Arctic amplification and extreme mid-latitude weather |journal=] |volume=7 |issue=9 |pages=627–637 |doi=10.1038/ngeo2234 |issn=1752-0908 |bibcode=2014NatGe...7..627C |url=https://epic.awi.de/id/eprint/36132/1/Cohenetal_NGeo14.pdf}}
			* {{cite journal |last1=Curtis |first1=P. |last2=Slay |first2=C. |last3=Harris |first3=N. |last4=Tyukavina |first4=A. |last5=Hansen |first5=M. |s2cid=52273353 |date=2018 |display-authors=4 |title=Classifying drivers of global forest loss |journal=] |volume=361 |issue=6407 |pages=1108–1111 |doi=10.1126/science.aau3445 |pmid=30213911 |bibcode=2018Sci...361.1108C |doi-access=free}}
			* {{cite journal |last1=Davidson |first1=Eric |title=The contribution of manure and fertilizer nitrogen to atmospheric nitrous oxide since 1860 |year=2009 |journal=] |volume=2 |pages=659–662 |doi=10.1016/j.chemer.2016.04.002 |doi-access=free}}
			* {{cite journal |last1=DeConto |first1=Robert M. |last2=Pollard |first2=David |s2cid=205247890 |date=2016 |title=Contribution of Antarctica to past and future sea-level rise |journal=] |volume=531 |issue=7596 |pages=591–597 |doi=10.1038/nature17145 |pmid=27029274 |issn=1476-4687 |bibcode=2016Natur.531..591D}}
			* {{cite journal |last1=Deutsch |first1=Curtis |last2=Brix |first2=Holger |last3=Ito |first3=Taka |last4=Frenzel |first4=Hartmut |last5=Thompson |first5=LuAnne |s2cid=11752699 |display-authors=4 |year=2011 |title=Climate-Forced Variability of Ocean Hypoxia |url=http://jetsam.ocean.washington.edu/~cdeutsch/papers/Deutsch_sci_11.pdf |journal=] |volume=333 |issue=6040 |pages=336–339 |bibcode=2011Sci...333..336D |doi=10.1126/science.1202422 |pmid=21659566 |archive-url=https://web.archive.org/web/20160509031133/http://jetsam.ocean.washington.edu/~cdeutsch/papers/Deutsch_sci_11.pdf |archive-date=9 May 2016 |url-status=live}}
			* {{cite journal |last1=Doney |first1=Scott C. |last2=Fabry |first2=Victoria J. |last3=Feely |first3=Richard A. |last4=Kleypas |first4=Joan A. |s2cid=402398 |date=2009 |title=Ocean Acidification: The Other {{CO2}} Problem |journal=Annual Review of Marine Science |volume=1 |issue=1 |pages=169–192 |doi=10.1146/annurev.marine.010908.163834 |pmid=21141034 |bibcode=2009ARMS....1..169D}}
			* {{cite book |ref={{harvid|USGCRP Chapter 2|2017}} |year=2017 |chapter=Chapter 2: Physical Drivers of Climate Change |title=In {{harvnb|USGCRP2017}} |chapter-url=https://science2017.globalchange.gov/downloads/CSSR_Ch2_Physical_Drivers.pdf |first1=D. W. |last1=Fahey |first2=S. J. |last2=Doherty |first3=K. A. |last3=Hibbard |first4=A. |last4=Romanou |first5=P. C. |last5=Taylor}}
			* {{cite journal |last1=Fischer |first1=Tobias P. |last2=Aiuppa |first2=Alessandro |date=2020 |title=AGU Centennial Grand Challenge: Volcanoes and Deep Carbon Global CO2 Emissions From Subaerial Volcanism{{snd}}Recent Progress and Future Challenges |journal=] |volume=21 |issue=3 |pages=e08690 |doi=10.1029/2019GC008690 |bibcode=2020GGG....2108690F |issn=1525-2027 |doi-access=free |hdl=10447/498846 |hdl-access=free}}
			* {{cite journal |last1=Friedlingstein |first1=Pierre |last2=Jones |first2=Matthew W. |last3=O'Sullivan |first3=Michael |last4=Andrew |first4=Robbie M. |display-authors=4 |last5=Hauck |first5=Judith |last6=Peters |first6=Glen P. |last7=Peters |first7=Wouter |last8=Pongratz |first8=Julia |last9=Sitch |first9=Stephen |last10=Quéré |first10=Corinne Le |last11=Bakker |first11=Dorothee C. E. |date=2019 |title=Global Carbon Budget 2019 |journal=Earth System Science Data |volume=11 |issue=4 |pages=1783–1838 |doi=10.5194/essd-11-1783-2019 |bibcode=2019ESSD...11.1783F |issn=1866-3508 |doi-access=free |hdl=10871/39943 |hdl-access=free}}
			* {{cite journal |last1=Forster |first1=P. M. |last2=Smith |first2=C. J. |last3=Walsh |first3=T. |last4=Lamb |first4=W. F. |last5=Lamboli |first5=R. |display-authors=4 |year=2024 |title=Indicators of Global Climate Change 2023: annual update of large-scale indicators of the state of the climate system and human influence |url=https://essd.copernicus.org/articles/16/2625/2024/essd-16-2625-2024.pdf |journal=Earth System Science Data |volume=16 |issue=6 |pages=2625–2658 |doi=10.5194/essd-16-2625-2024 |bibcode=2023ESSD...15.2295F |access-date=1 November 2024 |doi-access=free}}
			* {{cite journal |last1=Goyal |first1=Rishav |last2=England |first2=Matthew H. |last3=Sen Gupta |first3=Alex |last4=Jucker |first4=Martin |date=2019 |title=Reduction in surface climate change achieved by the 1987 Montreal Protocol |journal=] |volume=14 |issue=12 |page=124041 |doi=10.1088/1748-9326/ab4874 |bibcode=2019ERL....14l4041G |issn=1748-9326 |doi-access=free |hdl=1959.4/unsworks_66865 |hdl-access=free}}
			* {{cite journal |last1=Grubb |first1=M. |date=2003 |title=The Economics of the Kyoto Protocol |journal=World Economics |volume=4 |issue=3 |pages=144–145 |url=http://ynccf.net/pdf/CDM/The_economic_of_Kyoto_protocol.pdf |archive-url=https://web.archive.org/web/20120904015424/http://ynccf.net/pdf/CDM/The_economic_of_Kyoto_protocol.pdf |archive-date=4 September 2012 |url-status=dead}}
			* {{cite journal |last=Gunningham |first=Neil |date=2018 |title=Mobilising civil society: can the climate movement achieve transformational social change? |url=http://www.interfacejournal.net/wordpress/wp-content/uploads/2018/12/Interface-10-1-2-Gunningham.pdf |journal=Interface: A Journal for and About Social Movements |volume=10 |access-date=12 April 2019 |archive-url=https://web.archive.org/web/20190412214425/http://www.interfacejournal.net/wordpress/wp-content/uploads/2018/12/Interface-10-1-2-Gunningham.pdf |archive-date=12 April 2019 |url-status=live}}
			* {{cite journal |title=Nudging out support for a carbon tax |last1=Hagmann |first1=David |last2=Ho |first2=Emily H. |last3=Loewenstein |first3=George |s2cid=182663891 |journal=] |year=2019 |volume=9 |issue=6 |pages=484–489 |doi=10.1038/s41558-019-0474-0 |bibcode=2019NatCC...9..484H}}
			* {{cite journal |last1=Hansen |first1=James |last2=Sato |first2=Makiko |last3=Hearty |first3=Paul |last4=Ruedy |first4=Reto |last5=Kelley |first5=Maxwell |last6=Masson-Delmotte |first6=Valerie |last7=Russell |first7=Gary |last8=Tselioudis |first8=George |last9=Cao |first9=Junji |last10=Rignot |first10=Eric |last11=Velicogna |first11=Isabella |s2cid=9410444 |display-authors=4 |date=2016 |title=Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming could be dangerous |journal=Atmospheric Chemistry and Physics |volume=16 |issue=6 |pages=3761–3812 |doi=10.5194/acp-16-3761-2016 |arxiv=1602.01393 |bibcode=2016ACP....16.3761H |issn=1680-7316 |url=https://www.atmos-chem-phys.net/16/3761/2016/acp-16-3761-2016.html |doi-access=free}}
			* {{cite journal |last1=Harvey |first1=Jeffrey A. |last2=Van den Berg |first2=Daphne |last3=Ellers |first3=Jacintha |last4=Kampen |first4=Remko |display-authors=4 |last5=Crowther |first5=Thomas W. |last6=Roessingh |first6=Peter |last7=Verheggen |first7=Bart |last8=Nuijten |first8=Rascha J. M. |last9=Post |first9=Eric |last10=Lewandowsky |first10=Stephan |last11=Stirling |first11=Ian |date=2018 |title=Internet Blogs, Polar Bears, and Climate-Change Denial by Proxy |journal=] |volume=68 |issue=4 |pages=281–287 |doi=10.1093/biosci/bix133 |issn=0006-3568 |pmid=29662248 |pmc=5894087}}{{Erratum|doi=10.1093/biosci/biy033|pmid=29608770|http://retractionwatch.com/2018/04/02/caught-our-notice-climate-change-leads-to-more-neurosurgery-for-polar-bears/ ''Retraction Watch''|checked=yes}}
			* {{cite journal |display-authors=4 |last1=Hawkins |first1=Ed |last2=Ortega |first2=Pablo |last3=Suckling |first3=Emma |last4=Schurer |first4=Andrew |last5=Hegerl |first5=Gabi |last6=Jones |first6=Phil |last7=Joshi |first7=Manoj |last8=Osborn |first8=Timothy J. |last9=Masson-Delmotte |first9=Valérie |last10=Mignot |first10=Juliette |last11=Thorne |first11=Peter |last12=van Oldenborgh |first12=Geert Jan |year=2017 |title=Estimating Changes in Global Temperature since the Preindustrial Period |journal=Bulletin of the American Meteorological Society |volume=98 |issue=9 |pages=1841–1856 |issn=0003-0007 |doi=10.1175/bams-d-16-0007.1 |bibcode=2017BAMS...98.1841H |doi-access=free |hdl=20.500.11820/f0ba8a1c-a259-4689-9fc3-77ec82fff5ab |hdl-access=free}}
			* {{cite journal |last1=He |first1=Yanyi |last2=Wang |first2=Kaicun |last3=Zhou |first3=Chunlüe |last4=Wild |first4=Martin |date=2018 |title=A Revisit of Global Dimming and Brightening Based on the Sunshine Duration |journal=] |volume=45 |issue=9 |pages=4281–4289 |doi=10.1029/2018GL077424 |issn=1944-8007 |bibcode=2018GeoRL..45.4281H |doi-access=free |hdl=20.500.11850/268470 |hdl-access=free}}
			* {{cite journal |last1=Hodder |first1=Patrick |last2=Martin |first2=Brian |date=2009 |title=Climate Crisis? The Politics of Emergency Framing |journal=Economic and Political Weekly |volume=44 |issue=36 |pages=53–60 |issn=0012-9976 |jstor=25663518}}
			* {{cite journal |last1=Joo |first1=Gea-Jae |last2=Kim |first2=Ji Yoon |last3=Do |first3=Yuno |last4=Lineman |first4=Maurice |date=2015 |title=Talking about Climate Change and Global Warming |journal=PLOS ONE |volume=10 |issue=9 |pages=e0138996 |doi=10.1371/journal.pone.0138996 |pmid=26418127 |issn=1932-6203 |bibcode=2015PLoSO..1038996L |pmc=4587979 |doi-access=free}}
			* {{cite journal |title=Climate Change Impact: The Experience of the Coastal Areas of Bangladesh Affected by Cyclones Sidr and Aila |last1=Kabir |first1=Russell |last2=Khan |first2=Hafiz T. A. |last3=Ball |first3=Emma |last4=Caldwell |first4=Khan |volume=2016 |page=9654753 |date=2016 |journal=Journal of Environmental and Public Health |doi=10.1155/2016/9654753 |pmid=27867400 |pmc=5102735 |doi-access=free}}
			* {{cite journal |last1=Kaczan |first1=David J. |last2=Orgill-Meyer |first2=Jennifer |date=2020 |title=The impact of climate change on migration: a synthesis of recent empirical insights |url=https://link.springer.com/article/10.1007/s10584-019-02560-0 |journal=Climatic Change |volume=158 |issue=3 |pages=281–300 |doi=10.1007/s10584-019-02560-0 |bibcode=2020ClCh..158..281K |s2cid=207988694 |access-date=9 February 2021}}
			* {{cite journal <!-- Authors of the box. --> |last1=Kennedy |first1=J. J. |last2=Thorne |first2=W. P. |last3=Peterson |first3=T. C. |last4=Ruedy |first4=R. A. |last5=Stott |first5=P. A. |last6=Parker |first6=D. E. |last7=Good |first7=S. A. |last8=Titchner |first8=H. A. |last9=Willett |first9=K. M. |display-authors=4 |title=How do we know the world has warmed? |at=S26-S27 |date=2010 |editor-first1=D. S. |editor-last1=Arndt |editor-first2=M. O. |editor-last2=Baringer |editor-first3=M. R. |editor-last3=Johnson |journal=] |department=Special supplement: State of the Climate in 2009 |volume=91 |issue=7 |doi=10.1175/BAMS-91-7-StateoftheClimate}}
			* {{cite book |ref={{harvid|USGCRP Chapter 15|2017}} |chapter=Chapter 15: Potential Surprises: Compound Extremes and Tipping Elements |last1=Kopp |first1=R. E. |last2=Hayhoe |first2=K. |last3=Easterling |first3=D. R. |last4=Hall |first4=T. |last5=Horton |first5=R. |first6=K. E. |last6=Kunkel |first7=A. N. |last7=LeGrande |display-authors=4 |chapter-url=https://science2017.globalchange.gov/chapter/15/ |year=2017 |title=In {{harvnb|USGCRP|2017}} |pages=1–470 |archive-url=https://web.archive.org/web/20180820172529/https://science2017.globalchange.gov/chapter/15/ |archive-date=20 August 2018 |url-status=live}}
			* {{cite book |ref={{harvid|USGCRP Chapter 9|2017}} |chapter=Chapter 9: Extreme Storms |title=In {{harvnb|USGCRP2017}} |year=2017 |chapter-url=https://science2017.globalchange.gov/chapter/9/ |first1=J. P. |last1=Kossin |first2=T. |last2=Hall |first3=T. |last3=Knutson |first4=K. E. |last4=Kunkel |first5=R. J. |last5=Trapp |first6=D. E. |last6=Walizer |first7=M. F. |last7=Wehner |pages=1–470}}
			* {{cite book |chapter=Appendix C: Detection and attribution methodologies overview. |title=In {{harvnb|USGCRP2017}} |chapter-url=https://science2017.globalchange.gov/chapter/appendix-c/ |last=Knutson |first=T. |year=2017 |pages=1–470}}
			* {{Cite journal |last1=Kreidenweis |first1=Ulrich |last2=Humpenöder |first2=Florian |last3=Stevanović |first3=Miodrag |last4=Bodirsky |first4=Benjamin Leon |last5=Kriegler |first5=Elmar |last6=Lotze-Campen |first6=Hermann |last7=Popp |first7=Alexander |display-authors=4 |date=July 2016 |title=Afforestation to mitigate climate change: impacts on food prices under consideration of albedo effects |journal=] |volume=11 |issue=8 |page=085001 |doi=10.1088/1748-9326/11/8/085001 |bibcode=2016ERL....11h5001K |s2cid=8779827 |issn=1748-9326 |doi-access=free}}
			* {{cite journal |title=The Aluminum Smelting Process |year=2014 |pmc=4131936 |last1=Kvande |first1=H. |journal=Journal of Occupational and Environmental Medicine |volume=56 |issue=5 Suppl |pages=S2–S4 |doi=10.1097/JOM.0000000000000154 |pmid=24806722}}
			* {{cite journal |last=Lapenis |first=Andrei G. |journal=Eos |title=Arrhenius and the Intergovernmental Panel on Climate Change |year=1998 |doi=10.1029/98EO00206 |volume=79 |issue=23 |page=271 |bibcode=1998EOSTr..79..271L}}
			* {{cite journal |last1=Levermann |first1=Anders |last2=Clark |first2=Peter U. |last3=Marzeion |first3=Ben |last4=Milne |first4=Glenn A. |display-authors=4 |last5=Pollard |first5=David |last6=Radic |first6=Valentina |last7=Robinson |first7=Alexander |date=2013 |title=The multimillennial sea-level commitment of global warming |journal=Proceedings of the National Academy of Sciences |volume=110 |issue=34 |pages=13745–13750 |doi=10.1073/pnas.1219414110 |pmid=23858443 |pmc=3752235 |bibcode=2013PNAS..11013745L |issn=0027-8424 |doi-access=free}}
			* {{Cite journal |last1=Lenoir |first1=Jonathan |last2=Bertrand |first2=Romain |last3=Comte |first3=Lise |last4=Bourgeaud |first4=Luana |last5=Hattab |first5=Tarek |last6=Murienne |first6=Jérôme |last7=Grenouillet |first7=Gaël |display-authors=4 |title=Species better track climate warming in the oceans than on land |url=https://www.nature.com/articles/s41559-020-1198-2 |year=2020 |journal=Nature Ecology & Evolution |volume=4 |issue=8 |pages=1044–1059 |doi=10.1038/s41559-020-1198-2 |pmid=32451428 |bibcode=2020NatEE...4.1044L |s2cid=218879068 |issn=2397-334X}}
			* {{cite journal |last1=Liepert |first1=Beate G. |last2=Previdi |first2=Michael |year=2009 |title=Do Models and Observations Disagree on the Rainfall Response to Global Warming? |journal=Journal of Climate |volume=22 |issue=11 |pages=3156–3166 |bibcode=2009JCli...22.3156L |doi=10.1175/2008JCLI2472.1 |url=https://zenodo.org/record/896855 |doi-access=free}}
			* {{cite journal |last1=Liverman |first1=Diana M. |title=Conventions of climate change: constructions of danger and the dispossession of the atmosphere |journal=Journal of Historical Geography |date=2009 |volume=35 |issue=2 |pages=279–296 |doi=10.1016/j.jhg.2008.08.008}}
			* {{cite journal |ref={{harvid|Loeb et al.|2021}} |last1=Loeb |first1=Norman G. |last2=Johnson |first2=Gregory C. |last3=Thorsen |first3=Tyler J. |last4=Lyman |first4=John M. |last5=Rose |first5=Fred G. |last6=Kato |first6=Seiji |title=Satellite and Ocean Data Reveal Marked Increase in Earth's Heating Rate |journal=Geophysical Research Letters |publisher=American Geophysical Union (AGU) |volume=48 |issue=13 |at=e2021GL093047 |year=2021 |issn=0094-8276 |doi=10.1029/2021gl093047 |doi-access=free |bibcode=2021GeoRL..4893047L |s2cid=236233508}}
			* {{Cite journal |last1=Mach |first1=Katharine J. |last2=Kraan |first2=Caroline M. |last3=Adger |first3=W. Neil |last4=Buhaug |first4=Halvard |display-authors=4 |last5=Burke |first5=Marshall |last6=Fearon |first6=James D. |last7=Field |first7=Christopher B. |last8=Hendrix |first8=Cullen S. |last9=Maystadt |first9=Jean-Francois |last10=O'Loughlin |first10=John |last11=Roessler |first11=Philip |date=2019 |title=Climate as a risk factor for armed conflict |url=https://www.nature.com/articles/s41586-019-1300-6 |journal=] |volume=571 |issue=7764 |pages=193–197 |doi=10.1038/s41586-019-1300-6 |pmid=31189956 |bibcode=2019Natur.571..193M |s2cid=186207310 |issn=1476-4687 |hdl=10871/37969 |hdl-access=free}}
			* {{cite journal |last1=Matthews |first1=H. Damon |last2=Gillett |first2=Nathan P. |last3=Stott |first3=Peter A. |last4=Zickfeld |first4=Kirsten |s2cid=4423773 |date=2009 |title=The proportionality of global warming to cumulative carbon emissions |journal=] |volume=459 |issue=7248 |pages=829–832 |doi=10.1038/nature08047 |pmid=19516338 |bibcode=2009Natur.459..829M |issn=1476-4687}}
			* {{cite journal |last=Matthews |first=Tom |year=2018 |title=Humid heat and climate change |url=https://journals.sagepub.com/doi/10.1177/0309133318776490 |journal=Progress in Physical Geography: Earth and Environment |volume=42 |issue=3 |pages=391–405 |doi=10.1177/0309133318776490 |bibcode=2018PrPG...42..391M |s2cid=134820599}}
			* {{cite journal |last=McNeill |first=V. Faye |date=2017 |title=Atmospheric Aerosols: Clouds, Chemistry, and Climate |journal=Annual Review of Chemical and Biomolecular Engineering |volume=8 |issue=1 |pages=427–444 |doi=10.1146/annurev-chembioeng-060816-101538 |pmid=28415861 |issn=1947-5438 |doi-access=free}}
			* {{cite journal |last1=Melillo |first1=J. M. |last2=Frey |first2=S. D. |last3=DeAngelis |first3=K. M. |author-link3=Kristen DeAngelis |last4=Werner |first4=W. J. |last5=Bernard |first5=M. J. |last6=Bowles |first6=F. P. |last7=Pold |first7=G. |last8=Knorr |first8=M. A. |last9=Grandy |first9=A. S. |year=2017 |display-authors=4 |title=Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world |journal=] |volume=358 |issue=6359 |pages=101–105 |bibcode=2017Sci...358..101M |doi=10.1126/science.aan2874 |pmid=28983050 |doi-access=free |hdl=1912/9383 |hdl-access=free}}
			* {{cite journal |last1=Mercure |first1=J.-F. |last2=Pollitt |first2=H. |last3=Viñuales |first3=J. E. |last4=Edwards |first4=N. R. |display-authors=4 |last5=Holden |first5=P. B. |last6=Chewpreecha |first6=U. |last7=Salas |first7=P. |last8=Sognnaes |first8=I. |last9=Lam |first9=A. |last10=Knobloch |first10=F. |s2cid=89799744 |date=2018 |title=Macroeconomic impact of stranded fossil fuel assets |journal=Nature Climate Change |volume=8 |issue=7 |pages=588–593 |doi=10.1038/s41558-018-0182-1 |bibcode=2018NatCC...8..588M |hdl=10871/37807 |issn=1758-6798 |url=http://oro.open.ac.uk/55387/1/mercure_StrandedAssets_v16_with_Methods.pdf}}
			* {{cite journal |last1=Mitchum |first1=G. T. |last2=Masters |first2=D. |last3=Hamlington |first3=B. D. |last4=Fasullo |first4=J. T. |last5=Beckley |first5=B. D. |last6=Nerem |first6=R. S. |display-authors=4 |date=2018 |title=Climate-change–driven accelerated sea-level rise detected in the altimeter era |journal=Proceedings of the National Academy of Sciences |volume=115 |issue=9 |pages=2022–2025 |doi=10.1073/pnas.1717312115 |issn=0027-8424 |pmid=29440401 |pmc=5834701 |bibcode=2018PNAS..115.2022N |doi-access=free}}
			*{{cite journal |ref={{harvid|Mora et al.|2017}} |doi=10.1038/nclimate3322 |title=Global risk of deadly heat |date=2017 |last1=Mora |first1=Camilo |last2=Dousset |first2=Bénédicte |last3=Caldwell |first3=Iain R. |last4=Powell |first4=Farrah E. |last5=Geronimo |first5=Rollan C. |last6=Bielecki |first6=Coral R. |last7=Counsell |first7=Chelsie W. W. |last8=Dietrich |first8=Bonnie S. |last9=Johnston |first9=Emily T. |last10=Louis |first10=Leo V. |last11=Lucas |first11=Matthew P. |last12=McKenzie |first12=Marie M. |last13=Shea |first13=Alessandra G. |last14=Tseng |first14=Han |last15=Giambelluca |first15=Thomas W. |last16=Leon |first16=Lisa R. |last17=Hawkins |first17=Ed |last18=Trauernicht |first18=Clay |journal=Nature Climate Change |volume=7 |issue=7 |pages=501–506 |bibcode=2017NatCC...7..501M}}
			* {{cite report |author=((National Academies of Sciences, Engineering, and Medicine)) |title=Negative Emissions Technologies and Reliable Sequestration: A Research Agenda |publisher=The National Academies Press |isbn=978-0-309-48455-8 |doi=10.17226/25259 |url=https://nap.nationalacademies.org/catalog/25259/negative-emissions-technologies-and-reliable-sequestration-a-research-agenda |location=Washington, D.C. |year=2019}}
			* {{cite book |ref=none |author=National Research Council |title=America's Climate Choices |publisher=The National Academies Press |isbn=978-0-309-14585-5 |location=Washington, D.C. |year=2011 |chapter=Causes and Consequences of Climate Change |chapter-url=https://www.nap.edu/read/12781/chapter/4 |access-date=28 January 2019 |archive-url=https://web.archive.org/web/20150721185851/http://www.nap.edu/openbook.php?record_id=12781&page=15 |archive-date=21 July 2015 |url-status=live |doi=10.17226/12781}}
			* {{cite journal |last1=Neukom |first1=Raphael |last2=Steiger |first2=Nathan |last3=Gómez-Navarro |first3=Juan José |last4=Wang |first4=Jianghao |last5=Werner |first5=Johannes P. |s2cid=198494930 |display-authors=4 |date=2019a |title=No evidence for globally coherent warm and cold periods over the preindustrial Common Era |journal=] |volume=571 |issue=7766 |pages=550–554 |doi=10.1038/s41586-019-1401-2 |pmid=31341300 |issn=1476-4687 |bibcode=2019Natur.571..550N |url=https://boris.unibe.ch/132301/7/333323_4_merged_1557735881.pdf}}
			* {{cite journal |last1=Neukom |first1=Raphael |last2=Barboza |first2=Luis A. |last3=Erb |first3=Michael P. |last4=Shi |first4=Feng |display-authors=4 |last5=Emile-Geay |first5=Julien |last6=Evans |first6=Michael N. |last7=Franke |first7=Jörg |last8=Kaufman |first8=Darrell S. |last9=Lücke |first9=Lucie |last10=Rehfeld |first10=Kira |last11=Schurer |first11=Andrew |date=2019b |title=Consistent multidecadal variability in global temperature reconstructions and simulations over the Common Era |journal=Nature Geoscience |volume=12 |issue=8 |pages=643–649 |doi=10.1038/s41561-019-0400-0 |pmid=31372180 |pmc=6675609 |bibcode=2019NatGe..12..643P |issn=1752-0908}}
			* {{cite journal |last1=O'Neill |first1=Saffron J. |last2=Boykoff |first2=Max |date=2010 |title=Climate denier, skeptic, or contrarian? |journal=Proceedings of the National Academy of Sciences of the United States of America |volume=107 |issue=39 |pages=E151 |doi=10.1073/pnas.1010507107 |issn=0027-8424 |pmc=2947866 |pmid=20807754 |bibcode=2010PNAS..107E.151O |doi-access=free}}
			* {{cite journal |last1=Poloczanska |first1=Elvira S. |last2=Brown |first2=Christopher J. |last3=Sydeman |first3=William J. |last4=Kiessling |first4=Wolfgang |last5=Schoeman |first5=David |display-authors=4 |date=2013 |title=Global imprint of climate change on marine life |journal=Nature Climate Change |volume=3 |issue=10 |pages=919–925 |doi=10.1038/nclimate1958 |issn=1758-6798 |bibcode=2013NatCC...3..919P |hdl=2160/34111 |url=https://espace.library.uq.edu.au/view/UQ:318633/UQ318633_peer_review.pdf}}
			* {{cite journal |title=Recent Climate Observations Compared to Projections |date=2007 |last1=Rahmstorf |first1=Stefan |last2=Cazenave |first2=Anny |last3=Church |first3=John A. |last4=Hansen |first4=James E. |author-link2=Anny Cazenave |author-link1=Stefan Rahmstorf |author-link3=John A. Church |last5=Keeling |first5=Ralph F. |author-link5=Ralph Keeling |last6=Parker |first6=David E. |author-link6=David Parker (climatologist) |last7=Somerville |first7=Richard C. J. |s2cid=34008905 |author-link7=Richard Somerville |display-authors=4 |journal=] |volume=316 |issue=5825 |page=709 |bibcode=2007Sci...316..709R |doi=10.1126/science.1136843 |pmid=17272686 |url=http://www.pik-potsdam.de/~stefan/Publications/Nature/rahmstorf_etal_science_2007.pdf |archive-url=https://web.archive.org/web/20180906115332/http://pik-potsdam.de/~stefan/Publications/Nature/rahmstorf_etal_science_2007.pdf |archive-date=6 September 2018 |url-status=live}}
			* {{cite journal |last1=Ramanathan |first1=V. |last2=Carmichael |first2=G. |year=2008 |title=Global and Regional Climate Changes due to Black Carbon |url=https://www.researchgate.net/publication/32034622 |journal=Nature Geoscience |volume=1 |issue=4 |pages=221–227 |bibcode=2008NatGe...1..221R |doi=10.1038/ngeo156}}
			* {{cite journal |last1=Randel |first1=William J. |last2=Shine |first2=Keith P. |author-link2=Keith Shine |last3=Austin |first3=John |last4=Barnett |first4=John |last5=Claud |first5=Chantal |last6=Gillett |first6=Nathan P. |last7=Keckhut |first7=Philippe |last8=Langematz |first8=Ulrike |last9=Lin |first9=Roger |display-authors=4 |title=An update of observed stratospheric temperature trends |year=2009 |journal=] |volume=114 |issue=D2 |page=D02107 |doi=10.1029/2008JD010421 |bibcode=2009JGRD..114.2107R |doi-access=free |id={{HAL|hal-00355600}}}}
			* {{cite journal |last1=Rauner |first1=Sebastian |last2=Bauer |first2=Nico |last3=Dirnaichner |first3=Alois |last4=Van Dingenen |first4=Rita |last5=Mutel |first5=Chris |last6=Luderer |first6=Gunnar |s2cid=214619069 |year=2020 |title=Coal-exit health and environmental damage reductions outweigh economic impacts |url=https://www.nature.com/articles/s41558-020-0728-x |journal=Nature Climate Change |volume=10 |issue=4 |pages=308–312 |doi=10.1038/s41558-020-0728-x |bibcode=2020NatCC..10..308R |issn=1758-6798}}
			* {{cite journal |last1=Rogelj |first1=Joeri |last2=Forster |first2=Piers M. |last3=Kriegler |first3=Elmar |last4=Smith |first4=Christopher J. |last5=Séférian |first5=Roland |s2cid=197542084 |display-authors=4 |date=2019 |title=Estimating and tracking the remaining carbon budget for stringent climate targets |journal=] |volume=571 |issue=7765 |pages=335–342 |doi=10.1038/s41586-019-1368-z |pmid=31316194 |bibcode=2019Natur.571..335R |issn=1476-4687 |doi-access=free |hdl=10044/1/78011 |hdl-access=free}}
			*{{cite journal |last1=Romanello |first1=M |display-authors=etal |title=The 2022 report of the Lancet Countdown on health and climate change: health at the mercy of fossil fuels |year=2022 |journal=The Lancet |volume=400 |issue=10363 |pages=1619–1654 |doi=10.1016/S0140-6736(22)01540-9 |pmid=36306815 |pmc=7616806 |url=http://eprints.lse.ac.uk/117227/1/2022_report_of_the_Lancet_Countdown_revision_draft._CORRECTIONS_clean.pdf}}
			*{{cite journal |last1=Romanello |first1=M |display-authors=etal |title=The 2023 report of the Lancet Countdown on health and climate change: the imperative for a health-centred response in a world facing irreversible harms |year=2023 |journal=The Lancet |volume=402 |issue=10419 |pages=2346–2394 |doi=10.1016/S0140-6736(23)01859-7 |pmid=37977174 |pmc=7616810 |url=http://eprints.lse.ac.uk/120864/1/2023_report_of_the_Lancet_Countdown.pdf}}
			* {{Cite journal |last1=Ruseva |first1=Tatyana |last2=Hedrick |first2=Jamie |last3=Marland |first3=Gregg |last4=Tovar |first4=Henning |last5=Sabou |first5=Carina |last6=Besombes |first6=Elia |display-authors=4 |date=2020 |title=Rethinking standards of permanence for terrestrial and coastal carbon: implications for governance and sustainability |url=http://www.sciencedirect.com/science/article/pii/S187734352030083X |journal=Current Opinion in Environmental Sustainability |volume=45 |pages=69–77 |doi=10.1016/j.cosust.2020.09.009 |bibcode=2020COES...45...69R |s2cid=229069907 |issn=1877-3435}}
			* {{cite journal |last1=Samset |first1=B. H. |last2=Sand |first2=M. |last3=Smith |first3=C. J. |last4=Bauer |first4=S. E. |last5=Forster |first5=P. M. |last6=Fuglestvedt |first6=J. S. |last7=Osprey |first7=S. |last8=Schleussner |first8=C.-F. |display-authors=4 |date=2018 |title=Climate Impacts From a Removal of Anthropogenic Aerosol Emissions |journal=Geophysical Research Letters |volume=45 |issue=2 |pages=1020–1029 |doi=10.1002/2017GL076079 |pmid=32801404 |pmc=7427631 |issn=1944-8007 |bibcode=2018GeoRL..45.1020S |url=http://eprints.whiterose.ac.uk/126653/7/Samset_et_al-2018-Geophysical_Research_Letters.pdf}}
			* {{cite journal |last1=Sand |first1=M. |last2=Berntsen |first2=T. K. |last3=von Salzen |first3=K. |last4=Flanner |first4=M. G. |last5=Langner |first5=J. |last6=Victor |first6=D. G. |title=Response of Arctic temperature to changes in emissions of short-lived climate forcers |display-authors=4 |date=2015 |journal=] |volume=6 |issue=3 |pages=286–289 |doi=10.1038/nclimate2880 |bibcode=2016NatCC...6..286S}}
			* {{cite journal |last1=Schmidt |first1=Gavin A. |last2=Ruedy |first2=Reto A. |last3=Miller |first3=Ron L. |last4=Lacis |first4=Andy A. |s2cid=28195537 |date=2010 |title=Attribution of the present-day total greenhouse effect |journal=Journal of Geophysical Research: Atmospheres |issn=2156-2202 |volume=115 |issue=D20 |pages=D20106 |doi=10.1029/2010JD014287 |bibcode=2010JGRD..11520106S |doi-access=free}}
			* {{cite journal |last1=Serdeczny |first1=Olivia |last2=Adams |first2=Sophie |last3=Baarsch |first3=Florent |last4=Coumou |first4=Dim |display-authors=4 |date=2016 |last5=Robinson |first5=Alexander |last6=Hare |first6=William |last7=Schaeffer |first7=Michiel |last8=Perrette |first8=Mahé |last9=Reinhardt |first9=Julia |s2cid=3900505 |title=Climate change impacts in Sub-Saharan Africa: from physical changes to their social repercussions |url=https://climateanalytics.org/media/ssa_final_published.pdf |journal=Regional Environmental Change |volume=17 |issue=6 |pages=1585–1600 |doi=10.1007/s10113-015-0910-2 |hdl=1871.1/c8dfb143-d9e1-4eef-9bbe-67b3c338d07f |issn=1436-378X}}
			* {{cite journal |last1=Sutton |first1=Rowan T. |last2=Dong |first2=Buwen |last3=Gregory |first3=Jonathan M. |date=2007 |title=Land/sea warming ratio in response to climate change: IPCC AR4 model results and comparison with observations |journal=Geophysical Research Letters |volume=34 |issue=2 |page=L02701 |bibcode=2007GeoRL..34.2701S |doi=10.1029/2006GL028164 |doi-access=free}}
			* {{cite journal |last1=Smale |first1=Dan A. |last2=Wernberg |first2=Thomas |last3=Oliver |first3=Eric C. J. |last4=Thomsen |first4=Mads |last5=Harvey |first5=Ben P. |s2cid=91471054 |date=2019 |title=Marine heatwaves threaten global biodiversity and the provision of ecosystem services |journal=Nature Climate Change |volume=9 |issue=4 |pages=306–312 |doi=10.1038/s41558-019-0412-1 |issn=1758-6798 |bibcode=2019NatCC...9..306S |url=http://pure.aber.ac.uk/ws/files/29181264/Smale_et_al_2019_NCC_pre_print.pdf}}
			* {{cite journal |last1=Smith |first1=Joel B. |last2=Schneider |first2=Stephen H. |last3=Oppenheimer |first3=Michael |last4=Yohe |first4=Gary W. |last5=Hare |first5=William |last6=Mastrandrea |first6=Michael D. |last7=Patwardhan |first7=Anand |last8=Burton |first8=Ian |last9=Corfee-Morlot |first9=Jan |display-authors=4 |year=2009 |title=Assessing dangerous climate change through an update of the Intergovernmental Panel on Climate Change (IPCC) 'reasons for concern' |journal=Proceedings of the National Academy of Sciences |volume=106 |issue=11 |pages=4133–4137 |bibcode=2009PNAS..106.4133S |doi=10.1073/pnas.0812355106 |pmc=2648893 |pmid=19251662 |first10=Chris H. D. |last10=Magadza |first11=Hans-Martin |last11=Füssel |first12=A. Barrie |last12=Pittock |first13=Atiq |last13=Rahman |first14=Avelino |last14=Suarez |first15=Jean-Pascal |last15=van Ypersele |doi-access=free}}
			* {{Cite journal |last1=Smith |first1=N. |last2=Leiserowitz |first2=A. |date=2013 |title=The role of emotion in global warming policy support and opposition. |journal=Risk Analysis |volume=34 |issue=5 |pages=937–948 |doi=10.1111/risa.12140 |pmid=24219420 |url=https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC4298023&blobtype=pdf |pmc=4298023}}
			* {{cite journal |last1=Stroeve |first1=J. |last2=Holland |first2=Marika M. |last3=Meier |first3=Walt |last4=Scambos |first4=Ted |last5=Serreze |first5=Mark |display-authors=4 |title=Arctic sea ice decline: Faster than forecast |year=2007 |journal=Geophysical Research Letters |volume=34 |issue=9 |page=L09501 |doi=10.1029/2007GL029703 |bibcode=2007GeoRL..34.9501S |doi-access=free}}
			* {{cite journal |title=Disentangling greenhouse warming and aerosol cooling to reveal Earth's climate sensitivity |last1=Storelvmo |first1=T. |last2=Phillips |first2=P. C. B. |last3=Lohmann |first3=U. |last4=Leirvik |first4=T. |last5=Wild |first5=M. |date=2016 |journal=Nature Geoscience |volume=9 |issue=4 |pages=286–289 |doi=10.1038/ngeo2670 |issn=1752-0908 |bibcode=2016NatGe...9..286S |url=https://eprints.soton.ac.uk/410581/1/ClimSens_012116_nofigs2.pdf}}
			* {{Cite journal |ref={{harvid|The Cenozoic CO<sub>2</sub> Proxy Integration Project (CenCOPIP) Consortium|2023}} |last1=The Cenozoic CO<sub>2</sub> Proxy Integration Project (CenCOPIP) Consortium |last2=Hönisch |first2=Bärbel |last3=Royer |first3=Dana L. |last4=Breecker |first4=Daniel O. |last5=Polissar |first5=Pratigya J. |last6=Bowen |first6=Gabriel J. |last7=Henehan |first7=Michael J. |last8=Cui |first8=Ying |last9=Steinthorsdottir |first9=Margret |last10=McElwain |first10=Jennifer C. |last11=Kohn |first11=Matthew J. |last12=Pearson |first12=Ann |last13=Phelps |first13=Samuel R. |last14=Uno |first14=Kevin T. |last15=Ridgwell |first15=Andy |date=2023 |title=Toward a Cenozoic history of atmospheric CO<sub>2</sub> |url=https://www.science.org/doi/10.1126/science.adi5177 |journal=] |volume=382 |issue=6675 |pages=eadi5177 |doi=10.1126/science.adi5177 |pmid=38060645 |bibcode=2023Sci...382i5177T |issn=0036-8075 |hdl=10023/30475 |hdl-access=free}}
			* {{cite journal |last1=Turetsky |first1=Merritt R. |last2=Abbott |first2=Benjamin W. |last3=Jones |first3=Miriam C. |last4=Anthony |first4=Katey Walter |last5=Koven |first5=Charles |last6=Kuhry |first6=Peter |last7=Lawrence |first7=David M. |last8=Gibson |first8=Carolyn |last9=Sannel |first9=A. Britta K. |display-authors=4 |date=2019 |title=Permafrost collapse is accelerating carbon release |journal=] |volume=569 |issue=7754 |pages=32–34 |bibcode=2019Natur.569...32T |doi=10.1038/d41586-019-01313-4 |pmid=31040419 |doi-access=free}}
			* {{cite journal |last1=Turner |first1=Monica G. |last2=Calder |first2=W. John |last3=Cumming |first3=Graeme S. |last4=Hughes |first4=Terry P. |last5=Jentsch |first5=Anke |last6=LaDeau |first6=Shannon L. |last7=Lenton |first7=Timothy M. |last8=Shuman |first8=Bryan N. |last9=Turetsky |first9=Merritt R. |last10=Ratajczak |first10=Zak |last11=Williams |first11=John W. |display-authors=4 |date=2020 |title=Climate change, ecosystems and abrupt change: science priorities |journal=Philosophical Transactions of the Royal Society B |volume=375 |issue=1794 |doi=10.1098/rstb.2019.0105 |pmc=7017767 |pmid=31983326}}
			* {{cite journal |last=Twomey |first=S. |date=1977 |title=The Influence of Pollution on the Shortwave Albedo of Clouds |journal=J. Atmos. Sci. |volume=34 |issue=7 |pages=1149–1152 |bibcode=1977JAtS...34.1149T |doi=10.1175/1520-0469(1977)034<1149:TIOPOT>2.0.CO;2 |issn=1520-0469 |doi-access=free}}
			* {{cite journal |last=Tyndall |first=John |author-link=John Tyndall |title=On the Absorption and Radiation of Heat by Gases and Vapours, and on the Physical Connection of Radiation, Absorption, and Conduction |journal=Philosophical Magazine |series=4 |date=1861 |volume=22 |pages=169–194, 273–285 |url-status=live |url=http://rstl.royalsocietypublishing.org/content/151/1.full.pdf+html |archive-url=https://web.archive.org/web/20160326122934/http://rstl.royalsocietypublishing.org/content/151/1.full.pdf+html |archive-date=26 March 2016}}
			* {{cite journal |last=Urban |first=Mark C. |date=2015 |title=Accelerating extinction risk from climate change |journal=] |volume=348 |issue=6234 |pages=571–573 |doi=10.1126/science.aaa4984 |issn=0036-8075 |pmid=25931559 |bibcode=2015Sci...348..571U |doi-access=free}}
			* {{cite book |author=USGCRP |year=2009 |title=Global Climate Change Impacts in the United States |editor-last1=Karl |editor1-first=T. R. |editor-last2=Melillo |editor2-first=J. |editor-last3=Peterson |editor3-first=T. |editor-last4=Hassol |editor4-first=S. J. |publisher=Cambridge University Press |isbn=978-0-521-14407-0 |url=https://www.globalchange.gov/reports/global-climate-change-impacts-united-states |access-date=19 January 2024 |archive-url=https://web.archive.org/web/20100406060050/http://www.globalchange.gov/publications/reports/scientific-assessments/us-impacts |archive-date=6 April 2010 |url-status=live}}
			* {{cite book |author=USGCRP |year=2017 |title=Climate Science Special Report: Fourth National Climate Assessment, Volume I |pages=1–470 |url=https://science2017.globalchange.gov/ |editor-last1=Wuebbles |editor1-first=D. J. |editor-last2=Fahey |editor2-first=D. W. |editor-last3=Hibbard |editor3-first=K. A. |editor-last4=Dokken |editor4-first=D. J. |editor-last5=Stewart |editor5-first=B. C. |editor-last6=Maycock |editor6-first=T. K. |display-editors=4 |location=Washington, D.C. |publisher=U.S. Global Change Research Program |doi=10.7930/J0J964J6}}
			* {{cite journal |last1=Vandyck |first1=T. |last2=Keramidas |first2=K. |last3=Kitous |first3=A. |last4=Spadaro |first4=J. |last5=Van DIngenen |first5=R. |last6=Holland |first6=M. |last7=Saveyn |first7=B. |display-authors=4 |date=2018 |title=Air quality co-benefits for human health and agriculture counterbalance costs to meet Paris Agreement pledges |journal=Nature Communications |volume=9 |issue=4939 |page=4939 |doi=10.1038/s41467-018-06885-9 |pmid=30467311 |pmc=6250710 |bibcode=2018NatCo...9.4939V}}
			* {{cite journal |last1=Velders |first1=G. J. M. |last2=Andersen |first2=S. O. |author-link2=Stephen O. Andersen |last3=Daniel |first3=J. S. |last4=Fahey |first4=D. W. |last5=McFarland |first5=M. |display-authors=2 |date=2007 |title=The importance of the Montreal Protocol in protecting climate |journal=Proceedings of the National Academy of Sciences of the United States of America |volume=104 |issue=12 |pages=4814–4819 |doi=10.1073/pnas.0610328104 |doi-access=free |pmid=17360370 |pmc=1817831 |bibcode=2007PNAS..104.4814V}}
			* {{cite journal |last1=Velders |first1=G. J. M. |last2=Daniel |first2=J. S. |last3=Montzka |first3=S. A. |last4=Vimont |first4=I. |last5=Rigby |first5=M. |last6=Krummel |first6=Paul B. |last7=Muhle |first7=J. |last8=O'Doherty |first8=S. |last9=Prinn |first9=R. G. |last10=Weiss |first10=R. F. |last11=Young |first11=D. |display-authors=1 |date=2022 |title=Projections of hydrofluorocarbon (HFC) emissions and the resulting global warming based on recent trends in observed abundances and current policies |journal=Atmospheric Chemistry and Physics |volume=22 |issue=9 |pages=6087–6101 |doi=10.5194/acp-22-6087-2022 |url=https://acp.copernicus.org/articles/22/6087/2022/acp-22-6087-2022.html |doi-access=free |bibcode=2022ACP....22.6087V |hdl=1721.1/148197 |hdl-access=free}}
			* {{cite book |ref={{harvid|USGCRP Chapter 1|2017}} |year=2017 |chapter=Chapter 1: Our Globally Changing Climate |title=In {{harvnb|USGCRP2017}} |chapter-url=https://science2017.globalchange.gov/downloads/CSSR_Ch1_Our_Globally_Changing_Climate.pdf |first1=D. J. |last1=Wuebbles |first2=D. R. |last2=Easterling |first3=K. |last3=Hayhoe |first4=T. |last4=Knutson |first5=R. E. |last5=Kopp |first6=J. P. |last6=Kossin |first7=K. E. |last7=Kunkel |last9=A. N. |last8=LeGran-de |first10=C. |last10=Mears |first11=W. V. |last11=Sweet |first12=P. C. |last12=Taylor |first13=R. S. |last13=Vose |first14=M. F. |last14=Wehne |display-authors=4}}
			* {{cite book |ref={{harvid|USGCRP Climate Science Supplement|2014}} |chapter=Appendix 3: Climate Science Supplement |last1=Walsh |first1=John |last2=Wuebbles |first2=Donald |last3=Hayhoe |first3=Katherine |last4=Kossin |first4=Kossin |last5=Kunkel |first5=Kenneth |last6=Stephens |first6=Graeme |display-authors=4 |chapter-url=http://s3.amazonaws.com/nca2014/low/NCA3_Full_Report_Appendix_3_Climate_Science_Supplement_LowRes.pdf?download=1 |year=2014 |series=US National Climate Assessment |title=Climate Change Impacts in the United States: The Third National Climate Assessment}}
			* {{cite journal |last1=Wang |first1=Bin |last2=Shugart |first2=Herman H. |last3=Lerdau |first3=Manuel T. |date=2017 |title=Sensitivity of global greenhouse gas budgets to tropospheric ozone pollution mediated by the biosphere |journal=] |volume=12 |issue=8 |page=084001 |doi=10.1088/1748-9326/aa7885 |issn=1748-9326 |bibcode=2017ERL....12h4001W |doi-access=free}}
			* {{cite journal |last1=Watts |first1=Nick |last2=Amann |first2=Markus |last3=Arnell |first3=Nigel |last4=Ayeb-Karlsson |first4=Sonja |display-authors=4 |last5=Belesova |first5=Kristine |last6=Boykoff |first6=Maxwell |last7=Byass |first7=Peter |last8=Cai |first8=Wenjia |last9=Campbell-Lendrum |first9=Diarmid |last10=Capstick |first10=Stuart |last11=Chambers |first11=Jonathan |s2cid=207976337 |date=2019 |title=The 2019 report of The Lancet Countdown on health and climate change: ensuring that the health of a child born today is not defined by a changing climate |url=https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(19)32596-6/abstract |journal=The Lancet |volume=394 |issue=10211 |pages=1836–1878 |doi=10.1016/S0140-6736(19)32596-6 |issn=0140-6736 |pmid=31733928 |bibcode=2019Lanc..394.1836W |hdl=10871/40583 |hdl-access=free}}
			* {{cite journal |last=Weart |first=Spencer |title=Rise of interdisciplinary research on climate |year=2013 |volume=110 |pages=3657–3664 |number=Supplement 1 |journal=Proceedings of the National Academy of Sciences |doi=10.1073/pnas.1107482109 |pmid=22778431 |pmc=3586608 |doi-access=free}}
			* {{cite journal |last1=Wild |first1=M. |last2=Gilgen |first2=Hans |last3=Roesch |first3=Andreas |last4=Ohmura |first4=Atsumu |last5=Long |first5=Charles |s2cid=13124021 |display-authors=4 |year=2005 |title=From Dimming to Brightening: Decadal Changes in Solar Radiation at Earth's Surface |journal=] |volume=308 |issue=5723 |doi=10.1126/science.1103215 |pages=847–850 |pmid=15879214 |bibcode=2005Sci...308..847W}}
			* {{cite journal |last1=Williams |first1=Richard G |last2=Ceppi |first2=Paulo |last3=Katavouta |first3=Anna |title=Controls of the transient climate response to emissions by physical feedbacks, heat uptake and carbon cycling |year=2020 |journal=] |volume=15 |issue=9 |pages=0940c1 |doi=10.1088/1748-9326/ab97c9 |bibcode=2020ERL....15i40c1W |doi-access=free |hdl=10044/1/80154 |hdl-access=free}}
			* {{cite journal |last1=Wolff |first1=Eric W. |last2=Shepherd |first2=John G. |last3=Shuckburgh |first3=Emily |last4=Watson |first4=Andrew J. |title=Feedbacks on climate in the Earth system: introduction |journal=Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |pmid=26438277 |pmc=4608041 |doi=10.1098/rsta.2014.0428 |date=2015 |volume=373 |issue=2054 |page=20140428 |bibcode=2015RSPTA.37340428W}}
			* {{cite journal |last1=Young |first1=Paul J. |last2=Harper |first2=Anna B. |last3=Huntingford |first3=Chris |last4=Paul |first4=Nigel D. |last5=Morgenstern |first5=Olaf |last6=Newman |first6=Paul A. |last7=Oman |first7=Luke D. |last8=Madronich |first8=Sasha |last9=Garcia |first9=Rolando R. |title=The Montreal Protocol protects the terrestrial carbon sink |date=2021 |display-authors=3 |journal=] |volume=596 |issue=7872 |pages=384–388 |doi=10.1038/s41586-021-03737-3 |doi-access=free |pmid=34408332 |bibcode=2021Natur.596..384Y}}
			*
			* {{cite journal |last1=Zeng |first1=Ning |last2=Yoon |first2=Jinho |s2cid=1708267 |title=Expansion of the world's deserts due to vegetation-albedo feedback under global warming |date=2009 |journal=] |volume=36 |issue=17 |page=L17401 |bibcode=2009GeoRL..3617401Z |doi=10.1029/2009GL039699 |issn=1944-8007 |doi-access=free}}
			* {{cite journal |last1=Zhang |first1=Jinlun |last2=Lindsay |first2=Ron |last3=Steele |first3=Mike |last4=Schweiger |first4=Axel |s2cid=9387303 |date=2008 |title=What drove the dramatic arctic sea ice retreat during summer 2007? |journal=Geophysical Research Letters |volume=35 |issue=11 |pages=1–5 |doi=10.1029/2008gl034005 |bibcode=2008GeoRL..3511505Z |doi-access=free}}
			{{refend}}
			==== Books, reports and legal documents ====
			{{refbegin|30em}}
			* {{cite web |ref={{harvid|G8+5 Academies|2009}}
			|title=G8+5 Academies' joint statement: Climate change and the transformation of energy technologies for a low carbon future
			|date=May 2009
			|publisher=The National Academies of Sciences, Engineering, and Medicine
			|author1=Academia Brasileira de Ciéncias (Brazil)
			|author2=Royal Society of Canada
			|author3=Chinese Academy of Sciences
			|author4=Académie des Sciences (France)
			|author5=Deutsche Akademie der Naturforscher Leopoldina (Germany)
			|author6=Indian National Science Academy
			|author7=Accademia Nazionale dei Lincei (Italy)
			|author8=Science Council of Japan, Academia Mexicana de Ciencias
			|author9=Academia Mexicana de Ciencias (Mexico)
			|author10=Russian Academy of Sciences
			|author11=Academy of Science of South Africa
			|author12=Royal Society (United Kingdom)
			|author13=National Academy of Sciences (United States of America)
			|url=http://www.nationalacademies.org/includes/G8+5energy-climate09.pdf
			|archive-url=https://web.archive.org/web/20100215171429/http://www.nationalacademies.org/includes/G8+5energy-climate09.pdf
			|archive-date=15 February 2010
			|url-status=dead
			|access-date=5 May 2010
			}}
			* {{cite book
			|first1=David |last1=Archer
			|author-link=David Archer (scientist)
			|first2=Raymond |last2=Pierrehumbert
			|author-link2=Raymond Pierrehumbert
			|title=The Warming Papers: The Scientific Foundation for the Climate Change Forecast
			|url=https://books.google.com/books?id=sPY9HOfnuS0C&pg=PT10|year=2013|publisher=John Wiley & Sons|isbn=978-1-118-68733-8
			}}
			* {{cite report |ref={{harvid|International Institute for Sustainable Development|2019}}
			|url=https://www.iisd.org/sites/default/files/publications/fossil-fuel-clean-energy-subsidy-swap.pdf
			|title=Fossil Fuel to Clean Energy Subsidy Swaps
			|last1=Bridle |first1=Richard
			|last2=Sharma |first2=Shruti
			|last3=Mostafa |first3=Mostafa
			|last4=Geddes |first4=Anna
			|date=June 2019
			}}
			* {{cite web
			|title=The Paris Agreement: Summary. Climate Focus Client Brief on the Paris Agreement III
			|author=Climate Focus
			|date=December 2015
			|access-date=12 April 2019
			|url=https://climatefocus.com/sites/default/files/20151228%20COP%2021%20briefing%20FIN.pdf
			|archive-url=https://web.archive.org/web/20181005005832/https://climatefocus.com/sites/default/files/20151228%20COP%2021%20briefing%20FIN.pdf
			|archive-date=5 October 2018
			|url-status=live
			}}
			* {{cite report |ref={{harvid|UN Human Development Report|2020}}
			|author =Conceição
			|display-authors=etal
			| year =2020
			| title =Human Development Report 2020 The Next Frontier: Human Development and the Anthropocene
			| url =http://hdr.undp.org/sites/default/files/hdr2020.pdf
			| publisher =]
			| access-date =9 January 2021
			}}
			* {{cite report
			|last1=DeFries |first1=Ruth
			|author-link1=Ruth DeFries
			|last2=Edenhofer |first2=Ottmar
			|last3=Halliday |first3=Alex
			|last4=Heal |first4=Geoffrey
			|display-authors=etal
			|date=September 2019
			|title=The missing economic risks in assessments of climate change impacts
			|publisher=Grantham Research Institute on Climate Change and the Environment, London School of Economics and Political Science
			|url=https://www.lse.ac.uk/granthaminstitute/wp-content/uploads/2019/09/The-missing-economic-risks-in-assessments-of-climate-change-impacts-2.pdf
			}}
			* Dessler, Andrew E. and Edward A. Parson, eds. ''The science and politics of global climate change: A guide to the debate'' (Cambridge University Press, 2019).
			* {{cite web
			|title=The climate regime from The Hague to Marrakech: Saving or sinking the Kyoto Protocol?
			|last=Dessai |first=Suraje
			|date=2001
			|work=Tyndall Centre Working Paper 12
			|publisher=Tyndall Centre
			|archive-url=https://web.archive.org/web/20120610013556/http://www.tyndall.ac.uk/sites/default/files/wp12.pdf
			|archive-date=10 June 2012
			|url-status=dead
			|url=http://www.tyndall.ac.uk/sites/default/files/wp12.pdf
			|access-date=5 May 2010
			}}
			* {{cite book
			|last1=Dunlap |first1=Riley E.
			|last2=McCright |first2=Aaron M.
			|editor-last1=Dryzek |editor-first1=John S.
			|editor-first2=Richard B. |editor-last2=Norgaard
			|editor-first3=David |editor-last3=Schlosberg
			|title=The Oxford Handbook of Climate Change and Society
			|publisher=Oxford University Press
			|date=2011
			|pages=144–160
			|chapter=Chapter 10: Organized climate change denial
			|isbn=978-0-19-956660-0}}
			* {{cite book
			|last1=Dunlap |first1=Riley E.
			|last2=McCright |first2=Aaron M.
			|editor-last1=Dunlap |editor-first1=Riley E.
			|editor-first2=Robert J. |editor-last2=Brulle
			|title=Climate Change and Society: Sociological Perspectives
			|publisher=Oxford University Press
			|date=2015
			|pages=300–332
			|chapter=Chapter 10: Challenging Climate Change: The Denial Countermovement
			|isbn=978-0-19-935611-9}}
			*{{cite report |ref={{harvid|Ebi et al.|2018}} | last1=Ebi | first1=Kristie L. | last2=Balbus | first2=John | last3=Luber | first3=George | last4=Bole | first4=Aparna | last5=Crimmins | first5=Allison R. | last6=Glass | first6=Gregory E. | last7=Saha | first7=Shubhayu | last8=Shimamoto | first8=Mark M. | last9=Trtanj | first9=Juli M. | last10=White-Newsome | first10=Jalonne L. | title=Chapter 14 : Human Health. Impacts, Risks, and Adaptation in the United States: The Fourth National Climate Assessment, Volume II | date=2018 | doi=10.7930/nca4.2018.ch14}}
			* {{cite report
			| last=Flavell | first=Alex
			| title=IOM outlook on migration, environment and climate change
			| publisher=] (IOM) | publication-place=Geneva, Switzerland | year=2014
			| url = https://publications.iom.int/system/files/pdf/mecc_outlook.pdf
			| isbn=978-92-9068-703-0 | oclc=913058074}}
			* {{cite book
			|title=The Callendar Effect: the life and work of Guy Stewart Callendar (1898–1964)
			|year=2007
			|last=Fleming |first=James Rodger
			|publisher=American Meteorological Society
			|location=Boston
			|isbn=978-1-878220-76-9
			}}
			* {{cite report |ref={{harvid|UNDP|2021}}
			|title= Peoples' Climate Vote
			|last1 = Flynn |first1=C.
			|last2 = Yamasumi |first2=E.
			|last3 = Fisher |first3=S.
			|last4 = Snow |first4=D.
			|last5 = Grant |first5=Z.
			|last6 = Kirby |first6=M.
			|last7 = Browning |first7=P.
			|last8 = Rommerskirchen |first8=M.
			|last9 = Russell |first9=I.
			|display-authors= 4
			|publisher= UNDP and University of Oxford
			|date= January 2021
			|url= https://www.undp.org/sites/g/files/zskgke326/files/publications/UNDP-Oxford-Peoples-Climate-Vote-Results.pdf
			| access-date=5 August 2021
			}}
			* {{cite report |ref={{harvid|UNDP|2024}}
			|title= Peoples' Climate Vote 2024 Results
			|last1 = Flynn |first1=C.
			|last2 = Jardon |first2=S. T.
			|last3 = Fisher |first3=S.
			|last4 = Blayney |first4=M.
			|last5 = Ward |first5=A.
			|last6 = Smith |first6=H.
			|last7 = Struthoff |first7=P.
			|last8 = Fillingham |first8=Z.
			|display-authors= 2
			|publisher= UNDP and University of Oxford
			|date= June 2024
			|url= https://peoplesclimate.vote/document/Peoples_Climate_Vote_Report_2024.pdf
			| access-date=1 November 2024
			}}
			* {{cite report
			|author=Global Methane Initiative
			|title=Global Methane Emissions and Mitigation Opportunities
			|url=https://www.globalmethane.org/documents/gmi-mitigation-factsheet.pdf
			|date=2020
			|publisher=Global Methane Initiative
			}}
			* {{cite book
			|title=Shock Waves : Managing the Impacts of Climate Change on Poverty. Climate Change and Development
			|date=2016
			|isbn=978-1-4648-0674-2
			|doi=10.1596/978-1-4648-0673-5
			|last1=Hallegatte |first1=Stephane
			|last2=Bangalore |first2=Mook
			|last3=Bonzanigo |first3=Laura
			|last4=Fay |first4=Marianne
			|last5=Kane |first5=Tamaro
			|last6=Narloch |first6=Ulf
			|last7=Rozenberg |first7=Julie
			|last8=Treguer |first8=David
			|last9=Vogt-Schilb |first9=Adrien
			|display-authors=4
			|location=Washington, D.C.
			|publisher=World Bank
			|hdl=10986/22787
			|url=https://openknowledge.worldbank.org/bitstream/handle/10986/22787/9781464806735.pdf?sequence=13&isAllowed=y
			}}
			* {{cite book
			|title=Climate Change: Observed Impacts on Planet Earth
			|last=Haywood |first=Jim
			|year=2016
			|publisher=Elsevier
			|isbn=978-0-444-63524-2
			|editor-last=Letcher |editor-first=Trevor M.
			|chapter=Chapter 27 – Atmospheric Aerosols and Their Role in Climate Change
			}}
			* {{Cite report |ref={{harvid|IEA|2020b}}
			| author= IEA
			| date= December 2020
			| title= Energy Efficiency 2020
			|chapter=COVID-19 and energy efficiency
			|chapter-url= https://www.iea.org/reports/energy-efficiency-2020/covid-19-and-energy-efficiency#abstract
			| location= Paris, France
			| access-date=6 April 2021
			}}
			* {{Cite report
			| author= IEA
			| date= October 2021
			| title= Net Zero By 2050: A Roadmap for the Global Energy Sector
			| url= https://iea.blob.core.windows.net/assets/deebef5d-0c34-4539-9d0c-10b13d840027/NetZeroby2050-ARoadmapfortheGlobalEnergySector_CORR.pdf
			| location= Paris, France
			| access-date=4 April 2022
			}}
			* {{Cite report | ref={{harvid|IEA World Energy Outlook 2023}}
			| author= IEA
			| date= October 2023
			| title=World Energy Outlook 2023
			| url= https://iea.blob.core.windows.net/assets/26ca51d0-4a42-4649-a7c0-552d75ddf9b2/WorldEnergyOutlook2023.pdf
			| location= Paris, France
			| access-date=25 October 2021
			}}
			* {{cite book
			|title=Macroeconomic and Financial Policies for Climate Change Mitigation: A Review of the Literature
			|url=https://www.elibrary.imf.org/doc/IMF001/28337-9781513511955/28337-9781513511955/Other_formats/Source_PDF/28337-9781513512938.pdf
			|isbn=978-1-5135-1195-5
			|last1=Krogstrup |first1=Signe
			|last2=Oman |first2=William
			|series=IMF working papers
			|date=4 September 2019
			|volume=19
			|issue=185
			|doi=10.5089/9781513511955.001
			|s2cid=203245445
			|issn=1018-5941
			}}
			* {{cite report |ref={{harvid|Yale|2021}}
			|title= International Public Opinion on Climate Change
			|last1 = Leiserowitz |first1=A.
			|last2 = Carman |first2=J.
			|last3 = Buttermore |first3=N.
			|last4 = Wang |first4=X.
			|last5 = Rosenthal |first5=S.
			|last6 = Marlon |first6=J.
			|last7 = Mulcahy |first7=K.
			|display-authors= 4
			|publisher= Yale Program on Climate Change Communication and Facebook Data for Good
			|year= 2021
			|location= New Haven, CT
			|url= https://climatecommunication.yale.edu/wp-content/uploads/2021/06/international-climate-opinion-february-2021d.pdf
			| access-date=5 August 2021
			}}
			* {{Cite book|title=Future Energy: Improved, Sustainable and Clean Options for our Planet |edition=Third |publisher=] |year=2020|isbn=978-0-08-102886-5 |editor-last=Letcher|editor-first=Trevor M.}}
			* {{cite book
			|last1=Meinshausen |first1=Malte
			|chapter=Implications of the Developed Scenarios for Climate Change
			|date=2019
			|title=Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5&nbsp;°C and +2&nbsp;°C
			|pages=459–469
			|editor-last=Teske |editor-first=Sven
			|publisher=Springer International Publishing
			|doi=10.1007/978-3-030-05843-2_12 |doi-access=free
			|isbn=978-3-030-05843-2
			|s2cid=133868222
			|url=https://apo.org.au/node/235336
	}}		}}
			* {{cite report|ref={{harvid|ICCT|2019}}
	*{{cite journal
			|first1=J. |last1=Miller
	| last = Hoyt | first = Douglas V.
			|first2=L. |last2=Du
	| coauthors = Kenneth H. Schatten
			|first3=D. |last3=Kodjak
	| year = 1993-11
			|title=Impacts of World-Class Vehicle Efficiency and Emissions Regulations in Select G20 Countries
	| title = A discussion of plausible solar irradiance variations, 1700&ndash;1992
			|url=https://theicct.org/sites/default/files/publications/ICCT_G20-briefing-paper_Jan2017_vF.pdf
	| journal = ]
			|publisher=The International Council on Clean Transportation
	| volume = 98 | issue = A11 | pages = 18,895–18,906
			|location=Washington, D.C.
	| url = http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1993JGR....9818895H&amp;db_key=AST&amp;data_type=HTML&amp;format=&amp;high=448f267ff303582
			|year=2017
			}}
			* {{cite book
			|title=Copenhagen 2009: Failure or final wake-up call for our leaders? EV 49
			|last=Müller |first=Benito
			|date=February 2010
			|publisher=]
			|isbn=978-1-907555-04-6
			|page=i
			|url=https://www.oxfordenergy.org/wpcms/wp-content/uploads/2011/03/EV49-Copenhagen2009Failureorfinalwake-upcallforourleaders-BenitoMuller-2010.pdf
			|access-date=18 May 2010
			|archive-url=https://web.archive.org/web/20170710081944/https://www.oxfordenergy.org/wpcms/wp-content/uploads/2011/03/EV49-Copenhagen2009Failureorfinalwake-upcallforourleaders-BenitoMuller-2010.pdf
			|archive-date=10 July 2017|url-status=live
			}}
			* {{cite report
			|title=Understanding and responding to climate change: Highlights of National Academies Reports, 2008 edition
			|author=National Academies
			|year=2008
			|publisher=National Academy of Sciences
			|url=http://dels.nas.edu/resources/static-assets/materials-based-on-reports/booklets/climate_change_2008_final.pdf
			|access-date=9 November 2010
			|url-status=dead
			|archive-url=https://web.archive.org/web/20171011182257/http://dels.nas.edu/resources/static-assets/materials-based-on-reports/booklets/climate_change_2008_final.pdf
			|archive-date=11 October 2017
			}}
			* {{cite report
			|author=National Research Council
			|year=2012
			|title=Climate Change: Evidence, Impacts, and Choices
			|publisher=National Academy of Sciences
			|location=Washington, D.C.
			|url=https://nap.nationalacademies.org/download/14673
			|access-date=21 November 2023
			}}
			* {{cite book
			|last1=Newell |first1=Peter
			|title=Climate for Change: Non-State Actors and the Global Politics of the Greenhouse
			|date=14 December 2006
			|access-date=30 July 2018
			|publisher=Cambridge University Press
			|url=https://books.google.com/books?id=ing21MGmh5UC
			|isbn=978-0-521-02123-4
			}}
			* {{cite web |ref={{harvid|NOAA|2017}}
			|author=NOAA
			|url=https://tidesandcurrents.noaa.gov/publications/techrpt83_Global_and_Regional_SLR_Scenarios_for_the_US_final.pdf
			|title=January 2017 analysis from NOAA: Global and Regional Sea Level Rise Scenarios for the United States
			|access-date=7 February 2019
			|archive-url=https://web.archive.org/web/20171218140625/https://tidesandcurrents.noaa.gov/publications/techrpt83_Global_and_Regional_SLR_Scenarios_for_the_US_final.pdf
			|archive-date=18 December 2017 |url-status=live }}
			* {{cite book
			|last1=Olivier |first1=J. G. J.
			|last2=Peters |first2=J. A. H. W.
			|year=2019
			|title=Trends in global CO2 and total greenhouse gas emissions
			|publisher=PBL Netherlands Environmental Assessment Agency
			|url=https://www.pbl.nl/sites/default/files/downloads/pbl-2020-trends-in-global-co2-and-total-greenhouse-gas-emissions-2019-report_4068.pdf
			|place=The Hague
			}}
			* {{cite book
			|chapter=The scientific consensus on climate change: How do we know we're not wrong?
			|last1=Oreskes |first1=Naomi
			|author1-link=Naomi Oreskes
			|title=Climate Change: What It Means for Us, Our Children, and Our Grandchildren
			|editor-last1=DiMento |editor-first1=Joseph F. C.
			|editor-last2=Doughman |editor-first2=Pamela M.
			|publisher=The MIT Press
			|year=2007
			|isbn=978-0-262-54193-0
			}}
			* {{cite book
			|title=Merchants of Doubt: How a Handful of Scientists Obscured the Truth on Issues from Tobacco Smoke to Global Warming
			|date=2010
			|last1=Oreskes |first1=Naomi
			|first2=Erik |last2=Conway
			|publisher=Bloomsbury Press
			|edition=first
			|isbn=978-1-59691-610-4
			}}
			* {{Cite report | ref= {{harvid|Pew|2015}}
			| author= Pew Research Center
			| date=November 2015
			| title= Global Concern about Climate Change, Broad Support for Limiting Emissions
			| url= https://www.pewresearch.org/global/wp-content/uploads/sites/2/2015/11/Pew-Research-Center-Climate-Change-Report-FINAL-November-5-2015.pdf
			| access-date=5 August 2021
			}}
			* {{cite book
			|author=REN21
			|year=2020
			|title=Renewables 2020 Global Status Report
			|url=https://www.ren21.net/wp-content/uploads/2019/05/gsr_2020_full_report_en.pdf
			|location=Paris |publisher=REN21 Secretariat
			|isbn=978-3-948393-00-7
			}}
			* {{cite book
			|date=13 April 2005
			|author=Royal Society
			|title=Economic Affairs – Written Evidence
			|series=The Economics of Climate Change, the Second Report of the 2005–2006 session, produced by the UK Parliament House of Lords Economics Affairs Select Committee
			|url=https://publications.parliament.uk/pa/ld200506/ldselect/ldeconaf/12/12we24.htm
			|publisher=UK Parliament
			|access-date=9 July 2011
			|archive-url=https://web.archive.org/web/20111113084025/http://www.publications.parliament.uk/pa/ld200506/ldselect/ldeconaf/12/12we24.htm
			|archive-date=13 November 2011
			|url-status=live
			}}
			* {{cite book
			|title=Global trends in climate change litigation: 2019 snapshot
			|last1=Setzer |first1=Joana
			|last2=Byrnes |first2=Rebecca
			|date=July 2019
			|publisher=the Grantham Research Institute on Climate Change and the Environment and the Centre for Climate Change Economics and Policy
			|url=http://www.lse.ac.uk/GranthamInstitute/wp-content/uploads/2019/07/GRI_Global-trends-in-climate-change-litigation-2019-snapshot.pdf
			|location=London
			}}
			* {{cite report |ref={{harvid|NREL|2017}}
			|last1 = Steinberg |first1=D.
			|last2 = Bielen |first2=D.
			|last3 = Eichman |first3=J.
			|last4 = Eurek |first4=K.
			|last5 = Logan |first5=J.
			|last6 = Mai |first6=T.
			|last7 = McMillan |first7=C.
			|last8 = Parker |first8=A.
			|display-authors= 2
			|title= Electrification & Decarbonization: Exploring U.S. Energy Use and Greenhouse Gas Emissions in Scenarios with Widespread Electrification and Power Sector Decarbonization
			|publisher= National Renewable Energy Laboratory
			|date= July 2017
			|location=Golden, Colorado
			|url= https://www.nrel.gov/docs/fy17osti/68214.pdf
			}}
			* {{cite book |ref={{harvid|Teske, ed.|2019}}
			|chapter=Executive Summary
			|date=2019
			|title=Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5&nbsp;°C and +2&nbsp;°C
			|pages=xiii–xxxv
			|editor-last=Teske |editor-first=Sven
			|publisher=Springer International Publishing
			|doi=10.1007/978-3-030-05843-2 |doi-access=free
			|isbn=978-3-030-05843-2
			|s2cid=198078901
			|chapter-url=https://link.springer.com/content/pdf/bfm%3A978-3-030-05843-2%2F1.pdf
			|url=https://apo.org.au/node/235336
			}}
			* {{cite book
			|last1=Teske |first1=Sven
			|last2=Pregger |first2=Thomas
			|last3=Naegler|first3=Tobias
			|last4=Simon |first4=Sonja
			|last5=Pagenkopf |first5=Johannes
			|last6=Vvan den Adel |first6=Bent
			|last7=Deniz |first7= Özcan
			|display-authors= 4
			|chapter= Energy Scenario Results
			|date=2019
			|title=Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5&nbsp;°C and +2&nbsp;°C
			|pages=175–402
			|editor-last=Teske |editor-first=Sven
			|publisher=Springer International Publishing
			|doi=10.1007/978-3-030-05843-2_8 |doi-access=free
			|isbn=978-3-030-05843-2
			|s2cid=
			|url=https://apo.org.au/node/235336
			}}
			* {{cite book
			|last1=Teske |first1=Sven
			|chapter= Trajectories for a Just Transition of the Fossil Fuel Industry
			|date=2019
			|title=Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5&nbsp;°C and +2&nbsp;°C
			|pages=403–411
			|editor-last=Teske |editor-first=Sven
			|publisher=Springer International Publishing
			|doi=10.1007/978-3-030-05843-2_9 |doi-access=free
			|isbn=978-3-030-05843-2
			|s2cid=133961910
			|url=https://apo.org.au/node/235336
			}}
			* {{cite report
			|author=UN FAO
			|year=2016
			|title=Global Forest Resources Assessment 2015. How are the world's forests changing?
			|url=http://www.fao.org/3/a-i4793e.pdf#page=11
			|publisher=Food and Agriculture Organization of the United Nations
			|isbn=978-92-5-109283-5
			|access-date=1 December 2019
			}}
			* {{cite book |ref={{harvid|United Nations Environment Programme|2019}}
			|publisher=United Nations Environment Programme
			|year=2019
			|title=Emissions Gap Report 2019
			|url=https://wedocs.unep.org/bitstream/handle/20.500.11822/30797/EGR2019.pdf?sequence=1&isAllowed=y
			|location=Nairobi
			|isbn=978-92-807-3766-0
			}}
			* {{cite book |ref={{harvid|United Nations Environment Programme|2024}}
			|publisher=United Nations Environment Programme
			|year=2024
			|title=Emissions Gap Report 2024
			|url=https://www.unep.org/resources/emissions-gap-report-2024
			|location=Nairobi
			|isbn=978-92-807-4185-8
			}}
			* {{cite book|author = UNEP |year= 2018|title=The Adaptation Gap Report 2018|location=Nairobi, Kenya|url =https://www.unenvironment.org/resources/adaptation-gap-report|isbn=978-92-807-3728-8|publisher = United Nations Environment Programme (UNEP)}}
			* {{cite conference
			|year =1992
			|author=UNFCCC |author-link=UNFCCC
			|title=United Nations Framework Convention on Climate Change
			|url=https://unfccc.int/files/essential_background/background_publications_htmlpdf/application/pdf/conveng.pdf
			}}
			<!-- ## -->
			* {{cite web |ref={{harvid|Kyoto Protocol|1997}}
			|date =1997
			|author=UNFCCC
			|title=Kyoto Protocol to the United Nations Framework Convention on Climate Change
			|publisher=United Nations
			|url=https://unfccc.int/resource/docs/convkp/kpeng.html
			}}
			<!-- ## -->
			<!-- Example: Decision 2/CP.15 in {{harvnb|UNFCCC: Copenhagen|2009|loc=}} -->
			<!-- Cite by paragraph, as page numbering is variable. -->
			* {{cite conference |ref={{harvid|UNFCCC: Copenhagen|2009}}
			|date =30 March 2010
			|author=UNFCCC
			|chapter=Decision 2/CP.15: Copenhagen Accord
			|title=Report of the Conference of the Parties on its fifteenth session, held in Copenhagen from 7 to 19&nbsp;December&nbsp;2009
			|id =FCCC/CP/2009/11/Add.1
			|publisher=United Nations Framework Convention on Climate Change
			|chapter-url=http://unfccc.int/documentation/documents/advanced_search/items/3594.php?rec=j&priref=600005735#beg
			|access-date=17 May 2010
			|archive-url=https://web.archive.org/web/20100430005322/https://unfccc.int/documentation/documents/advanced_search/items/3594.php?rec=j&priref=600005735#beg
			|archive-date=30 April 2010
			|url-status=live
			}}
			<!-- ## -->
			* {{cite web |ref={{harvid|Paris Agreement|2015}}
			|date =2015
			|author=UNFCCC
			|title=Paris Agreement
			|publisher=United Nations Framework Convention on Climate Change
			|url=https://unfccc.int/files/essential_background/convention/application/pdf/english_paris_agreement.pdf
			}}
			<!-- ## -->
			* {{cite report |ref={{harvid|UN NDC Synthesis Report|2021}}
			| author = UNFCCC
			| date = 26 February 2021
			| title = Nationally determined contributions under the Paris Agreement Synthesis report by the secretariat
			| url = https://unfccc.int/sites/default/files/resource/cma2021_02E.pdf
			| publisher = ]
			}}
			<!-- ## -->
			* {{cite web |ref={{harvid|UNHCR|2011}}
			|title=Climate Change and the Risk of Statelessness: The Situation of Low-lying Island States
			|last=Park |first=Susin
			|date=May 2011
			|publisher=United Nations High Commissioner for Refugees
			|url=http://www.unhcr.org/4df9cb0c9.pdf
			|archive-url=https://web.archive.org/web/20130502223251/http://www.unhcr.org/4df9cb0c9.pdf
			|archive-date=2 May 2013|url-status=live|access-date=13 April 2012
			}}
			* {{cite report
			|author=United States Environmental Protection Agency
			|year=2016
			|title=Methane and Black Carbon Impacts on the Arctic: Communicating the Science
			|url=https://19january2017snapshot.epa.gov/climate-change-science/methane-and-black-carbon-impacts-arctic-communicating-science_.html
			|access-date=27 February 2019
			|archive-url=https://web.archive.org/web/20170906225344/https://19january2017snapshot.epa.gov/climate-change-science/methane-and-black-carbon-impacts-arctic-communicating-science_.html
			|archive-date=6 September 2017 |url-status=live
			}}
			* {{cite journal
			|last1=Van Oldenborgh |first1=Geert-Jan
			|last2=Philip |first2=Sjoukje
			|last3=Kew |first3=Sarah
			|last4=Vautard |first4=Robert
			|display-authors=etal
			|date=2019
			|website=Semantic Scholar
			|s2cid=199454488 |title=Human contribution to the record-breaking June 2019 heat wave in France
	}}		}}
	*{{cite book		* {{cite book
			|ref=none
	| last = Kenneth | first = James P.
			|last=Weart
	| coauthors = Kevin G. Cannariato, Ingrid L. Hendy, Richard J. Behl
			|first=Spencer
	| year = ]
			|date=October 2008
	| title = Methane Hydrates in Quaternary Climate Change: The Clathrate Gun Hypothesis
			|title=The Discovery of Global Warming
	| publisher = ]
			|edition=2nd
	| url = https://www.agu.org/cgi-bin/agubooks?book=ASSP0542960
			|location=Cambridge, MA
			|publisher=Harvard University Press
			|isbn=978-0-674-03189-0
			|url=http://history.aip.org/climate/reviews.htm
			|access-date=16 June 2020
			|url-status=live
			|archive-url=https://web.archive.org/web/20161118000413/http://history.aip.org/climate/reviews.htm
			|archive-date=18 November 2016}}
			* {{cite book
			|ref=none
			|last=Weart
			|first=Spencer
			|date=February 2019
			|title=The Discovery of Global Warming
			|edition=online
			|url=http://history.aip.org/climate/index.htm
			|access-date=19 June 2020
			|url-status=live
			|archive-url=https://web.archive.org/web/20200618075616/http://history.aip.org/climate/index.htm
			|archive-date=18 June 2020
			|author-link=Spencer R. Weart}}
			** {{citation|ref={{harvid|Weart "The Carbon Dioxide Greenhouse Effect"}} |mode=cs1 <!-- Because {cite web} doesn't do chapters. -->
			|last =Weart |first=Spencer
			|date =January 2020<!-- "The Discovery of Global Warming" is an evolving website, date is not useful for SFNs. -->
			|title=The Discovery of Global Warming
			|chapter=The Carbon Dioxide Greenhouse Effect
			|chapter-url=http://history.aip.org/climate/co2.htm
			|access-date=19 June 2020
			|publisher=American Institute of Physics
			|archive-url=https://web.archive.org/web/20161111191800/http://history.aip.org/climate/co2.htm
			|archive-date=11 November 2016
			|url-status=live
			}}
			** {{citation|ref=none |mode=cs1 <!-- Because {cite web} doesn't do chapters. -->
			|last =Weart |first=Spencer
			|date =January 2020<!-- "The Discovery of Global Warming" is an evolving website, date is not useful for SFNs. -->
			|title=The Discovery of Global Warming
			|chapter=The Public and Climate Change
			|chapter-url=http://history.aip.org/climate/public.htm
			|access-date=19 June 2020
			|publisher =American Institute of Physics
			|archive-url=https://web.archive.org/web/20161111191711/http://history.aip.org/climate/public.htm
			|archive-date=11 November 2016
			|url-status=live
			}}
			*** {{citation|ref={{harvid|Weart "Suspicions of a Human-Caused Greenhouse (1956–1969)"}} |mode=cs1 <!-- Because {cite web} doesn't do chapters. -->
			|last =Weart |first=Spencer
			|date =January 2020<!-- "The Discovery of Global Warming" is an evolving website, date is not useful for SFNs. -->
			|title=The Discovery of Global Warming
			|chapter=The Public and Climate Change: Suspicions of a Human-Caused Greenhouse (1956–1969)
			|chapter-url=http://history.aip.org/climate/public.htm#S2
			|access-date=19 June 2020
			|publisher =American Institute of Physics
			|archive-url=https://web.archive.org/web/20161111191711/http://history.aip.org/climate/public.htm#S2
			|archive-date=11 November 2016
			|url-status=live
			}}
			** {{citation|ref={{harvid|Weart "The Public and Climate Change (since 1980)"}} |mode=cs1 <!-- Because {cite web} doesn't do chapters. -->
			|last1=Weart |first1=Spencer
			|date =January 2020<!-- "The Discovery of Global Warming" is an evolving website, date is not useful for SFNs. -->
			|title=The Discovery of Global warming
			|chapter=The Public and Climate Change (cont.&nbsp;– since 1980)
			|chapter-url=https://history.aip.org/climate/public2.htm
			|access-date=19 June 2020
			|publisher =American Institute of Physics
			|archive-url=https://web.archive.org/web/20161111191659/http://history.aip.org/climate/public2.htm
			|archive-date=11 November 2016
			|url-status=live
			}}
			*** {{citation|ref={{harvid|Weart "The Public and Climate Change: The Summer of 1988"}} |mode=cs1 <!-- Because {cite web} doesn't do chapters. -->
			|first=Spencer |last=Weart
			|date =January 2020<!-- "The Discovery of Global Warming" is an evolving website, date is not useful for SFNs. -->
			|title=The Discovery of Global Warming
			|chapter=The Public and Climate Change: The Summer of 1988
			|chapter-url=http://history.aip.org/climate/public2.htm#S1988
			|access-date=19 June 2020
			|publisher=American Institute of Physics
			|archive-url=https://web.archive.org/web/20161111191659/http://history.aip.org/climate/public2.htm#S1988
			|archive-date=11 November 2016
			|url-status=live
			}}
			* {{cite report|ref={{harvid|World Bank, June|2019}}
			|title=State and Trends of Carbon Pricing 2019
			|url=http://documents.worldbank.org/curated/en/191801559846379845/pdf/State-and-Trends-of-Carbon-Pricing-2019.pdf
			|date=June 2019
			|publisher=World Bank
			|location=Washington, D.C.
			|doi=10.1596/978-1-4648-1435-8
			|hdl=10986/29687
			|isbn=978-1-4648-1435-8
			|hdl-access=free
	}}		}}
			*{{cite report |ref={{harvid|World Economic Forum|2024}} |author=World Economic Forum |title=Quantifying the Impact of Climate Change on Human Health |year=2024 |url=https://www3.weforum.org/docs/WEF_Quantifying_the_Impact_of_Climate_Change_on_Human_Health_2024.pdf}}
	*{{cite news
			* {{Cite report |ref={{harvid|WHO|2016}}
	| last = Keppler | first = Frank
			| author= World Health Organization
	| coauthors = Marc Brass, Jack Hamilton, Thomas Röckmann
			| year= 2016
	| title = Global Warming - The Blame Is not with the Plants
			| title=Ambient air pollution: a global assessment of exposure and burden of disease
	| url = http://www.mpg.de/english/illustrationsDocumentation/documentation/pressReleases/2006/pressRelease200601131/index.html
			| location= Geneva, Switzerland
	| publisher = ]
	| date = ]		| isbn = 978-92-4-151135-3
			| url= https://apps.who.int/iris/rest/bitstreams/1061179/retrieve
	}}
			}}
	*{{cite journal
			* {{cite book |ref={{harvid|WHO|2018}}
	| author = Kurzweil, Raymond
			|publisher=World Health Organization
	| authorlink = Raymond Kurzweil
			|title=COP24 Special Report Health and Climate Change
	| year = 2006-07
			|url=https://apps.who.int/iris/bitstream/handle/10665/276405/9789241514972-eng.pdf?ua=1
	| title = Nanotech Could Give Global Warming a Big Chill
			|year=2018
	| journal = Forbes / Wolfe Nanotech Report
			|location=Geneva
	| volume = 5 | issue = 7
			|isbn=978-92-4-151497-2
	| url = http://www.qsinano.com/pdf/ForbesWolfe_NanotechReport_July2006.pdf
			}}
	| format = ]
			* {{cite report |ref={{harvid|WMO SAOD|2022}} <!-- ipcc:20200204 -->
	}}
			|author=]
	*{{cite journal
			|publisher=]
	| title = The effect of increasing solar activity on the Sun's total and open magnetic flux during multiple cycles: Implications for solar forcing of climate
			|title=Scientific Assessment of Ozone Depletion|url=https://csl.noaa.gov/assessments/ozone/2022/downloads/2022OzoneAssessment.pdf
	| last = Lean | first = Judith L.
			|series=GAW Report No. 278
	| coauthors = Y.M. Wang, N.R. Sheeley
			|isbn=978-9914-733-99-0
	| year = 2002-12
			|year=2022
	| journal = ]
			|location=Geneva
	| volume = 29 | issue = 24 |
			}}
	| url = http://adsabs.harvard.edu/abs/2002GeoRL..29x..77L
			** {{cite book |ref={{harvid|WMO SAOD Executive Summary|2022}}
	| doi = 10.1029/2002GL015880
			|author=]
	}}
			|title={{Harvnb|WMO SAOD|2022}}
	*{{cite book
			|chapter-url=https://csl.noaa.gov/assessments/ozone/2022/downloads/executivesummary.pdf
	| last = Lerner | first = K. Lee
			|year=2022
	| coauthors = Brenda Wilmoth Lerner
			|chapter=Executive Summary
	| title = Environmental issues : essential primary sources.
			}}
	| publisher = ]
			* {{cite book |ref={{harvid|WMO|2024a}}
	| date = ]
			|publisher=]
	| isbn = 1414406258
			|title=WMO Statement on the State of the Global Climate in 2023
	}}
			|url=https://library.wmo.int/viewer/68835/download?file=1347_Global-statement-2023_en.pdf&type=pdf&navigator=1
	*{{cite journal
			|year=2024
	| last = McLaughlin | first = Joseph B.
			|location=Geneva
	| coauthors = Angelo DePaola, Cheryl A. Bopp, Karen A. Martinek, Nancy P. Napolilli, Christine G. Allison, Shelley L. Murray, Eric C. Thompson, Michele M. Bird, John P. Middaugh
			|series=WMO-No. 1347
	| title = Outbreak of Vibrio parahaemolyticus gastroenteritis associated with Alaskan oysters
			|isbn=978-92-63-11347-4
	| journal = ]
			}}
	| volume = 353 | issue = 14 | pages = 1463&ndash;1470
			* {{cite report |ref={{harvid|WMO|2024b}}
	| publisher = New England Medical Society
			|publisher=]
	| date = ]
			|title=WMO Global Annual to Decadal Climate Update: 2024-2028
	| url = http://content.nejm.org/cgi/content/abstract/353/14/1463
			|url=https://library.wmo.int/viewer/68910/download?file=WMO_GADCU_2024-2028_en.pdf&type=pdf&navigator=1
	}}''(online version requires registration)''
			|year=2024
	*{{cite journal
			|location=Geneva
	| last = Muscheler, Raimund
			}}
	| coauthors = Fortunat Joos, Simon A. Müller, Ian Snowball
			* {{cite book |ref={{harvid|World Resources Institute, December|2019}}
	| date = ]
			|publisher=World Resources Institute
	| title = Climate: How unusual is today's solar activity?
			|date=December 2019
	| journal = ]
			|title=Creating a Sustainable Food Future: A Menu of Solutions to Feed Nearly 10 Billion People by 2050
	| volume = 436 | issue = 7012 | pages = 1084–1087
			|location=Washington, D.C.
	| url = http://www.cgd.ucar.edu/ccr/raimund/publications/Muscheler_et_al_Nature2005.pdf
			|url=https://files.wri.org/d8/s3fs-public/wrr-food-full-report.pdf
	| format = ]
			|isbn=978-1-56973-953-2
	| doi = 10.1038/nature04045
	}}		}}
			{{refend}}
	*{{cite journal
	| last = Oerlemans | first = J.
	| date = ]
	| title = Extracting a Climate Signal from 169 Glacier Records
	| journal = ]
	| volume = 308 | issue = 5722 | pages = 675-677
	| url=http://www.cosis.net/abstracts/EGU05/04572/EGU05-J-04572.pdf
	| format = ]
	| doi = 10.1126/science.1107046
	}}
	*{{cite journal
	| last = Oreskes | first = Naomi
	| authorlink=Naomi Oreskes
	| date = ]
	| title = Beyond the Ivory Tower: The Scientific Consensus on Climate Change
	| journal = ]
	| volume = 306 | issue = 5702 | pages = 1686
	| url = http://www.sciencemag.org/cgi/reprint/306/5702/1686.pdf
	| format = ]
	| doi = 10.1126/science.1103618
	}}
	*{{cite journal
	| last = Purse | first = Bethan V.
	| coauthors = Philip S. Mellor, David J. Rogers, Alan R. Samuel, Peter P. C. Mertens, Matthew Baylis
	| title = Climate change and the recent emergence of bluetongue in Europe
	| journal = ]
	| volume = 3 | issue = 2 | pages = 171&ndash;181
	| date = February 2005
	| doi = 10.1038/nrmicro1090
	| url=http://www.nature.com/nrmicro/journal/v3/n2/abs/nrmicro1090_fs.html
	}}
	*{{cite news
	| last = Revkin | first = Andrew C
	| date = ]
	| title = Rise in Gases Unmatched by a History in Ancient Ice
	| publisher = ]
	| url = http://www.nytimes.com/2005/11/25/science/earth/25core.html?ei=5090&en=d5078e33050b2b0c&ex=1290574800&adxnnl=1&partner=rssuserland&emc=rss
	}}
	*{{cite book
	| last = Ruddiman | first = William F.
	| authorlink=William Ruddiman
	| date = ]
	| title = Earth's Climate Past and Future
	| location = New York
	| publisher = ]
	| isbn = 0-7167-3741-8
	| url = http://www.whfreeman.com/ruddiman/
	}}
	*{{cite book
	| last = Ruddiman | first = William F.
	| authorlink=William Ruddiman
	| date = ]
	| title = Plows, Plagues, and Petroleum: How Humans Took Control of Climate
	| location = New Jersey
	| publisher = ]
	| isbn = 0-691-12164-8
	}}
	*{{cite journal
	| last = Solanki | first = Sami K.
	| authorlink=Sami Solanki
	| coauthors = I.G. Usoskin, B. Kromer, M. Schussler, J. Beer
	| date = ]
	| title = Unusual activity of the Sun during recent decades compared to the previous 11,000 years.
	| journal = ]
	| volume = 431 | pages = 1084&ndash;1087
	| url = http://cc.oulu.fi/%7Eusoskin/personal/nature02995.pdf
	| format = ]
	| doi = 10.1038/nature02995
	}}
	*{{cite journal
	| last = Solanki | first = Sami K.
	| authorlink=Sami Solanki
	|coauthors = I. G. Usoskin, B. Kromer, M. Schüssler, J. Beer
	| date = ]
	| title = Climate: How unusual is today's solar activity? (Reply)
	| journal = ]
	| volume = 436
	| pages = E4-E5
	| url = http://cc.oulu.fi/%7Eusoskin/personal/sola_nature05.pdf
	| format = ]
	| doi = 10.1038/nature04046
	}}
	*{{cite journal
	| last = Sowers | first = Todd
	| date = ]
	| journal = Science
	| volume = 311 | issue = 5762 | pages = 838&ndash;840
	| title = Late Quaternary Atmospheric CH<sub>4</sub> Isotope Record Suggests Marine Clathrates Are Stable
	| doi = 10.1126/science.1121235
	}}
	*{{cite journal
	| last = Svensmark | first = Henrik
	| authorlink=Henrik Svensmark
	| coauthors = Jens Olaf P. Pedersen, Nigel D. Marsh, Martin B. Enghoff, Ulrik I. Uuggerhøj
	| year = ]
	| title = Experimental evidence for the role of ions in particle nucleation under atmospheric conditions
	| journal = ] A
	| volume = 463 | issue = 2078 | pages = 385-396
	| publisher = FirstCite Early Online Publishing
	| doi = 10.1098/rspa.2006.1773
	}}''(online version requires registration)''
	*{{cite journal
	| last = Walter | first = K. M.
	| coauthors = S. A. Zimov, Jeff P. Chanton, D. Verbyla, ]
	| date = ]
	| title = Methane bubbling from Siberian thaw lakes as a positive feedback to climate warming
	| journal = ]
	| volume = 443 | issue = 7107 | pages = 71-75
	| doi = 10.1038/nature05040
	}}
	*{{cite journal
	| last = Wang | first = Y.-M.
	| coauthors = J.L. Lean, N.R. Sheeley
	| date = ]
	| title = Modeling the sun's magnetic field and irradiance since 1713
	| journal = ]
	| volume = 625 | pages = 522–538
	| url = http://climatesci.colorado.edu/publications/pdf/Wang_2005.pdf
	| format = ]
	| doi = 10.1086/429689
	}}
	</div>
	==See also==
	* ]
	==External links==
	===Scientific===
	*
	*
	* – An extensive introduction to the topic and the history of its discovery
	*
	*
	*, March 19, 2007
	===Educational===
	* free research-quality simulation for students, educators, and scientists alike, with a user-friendly interface that runs on desktop computers
	* Interactive graphics — ]
	===Other===
	* A ] article
	*
	*
	*
	* – Extensive commented list of Internet resources – Science and Technology Sources on the Internet.
	*
	*, Australian science documentary about effects of global warming on rare, common, and endangered wildlife
	*
	* – Independent news on global warming and its consequences.
			==== Non-technical sources ====
			{{refbegin|30em}}
			* '']''
			** {{cite web |ref={{harvid|Associated Press, 22 September|2015}} |url=https://www.apstylebook.com/blog_posts/4 |title=An addition to AP Stylebook entry on global warming |last=Colford |first=Paul |date=22 September 2015 |website=AP Style Blog |access-date=6 November 2019}}
			* '']''
			** {{cite news |ref={{harvid|BBC, 1 May|2019}} |date=1 May 2019 |title=UK Parliament declares climate change emergency |publisher=BBC |url=https://www.bbc.com/news/uk-politics-48126677 |access-date=30 June 2019}}
			** {{cite web |ref={{harvid|BBC Science Focus Magazine, 3 February|2020}} |last=Rigby |first=Sara |date=3 February 2020 |title=Climate change: should we change the terminology? |website=BBC Science Focus Magazine |url=https://www.sciencefocus.com/news/climate-change-should-we-change-the-terminology/ |access-date=24 March 2020}}
			* '']''
			** {{cite news |last1=Stover |first1=Dawn |title=The global warming 'hiatus' |url=https://thebulletin.org/2014/09/the-global-warming-hiatus/ |work=Bulletin of the Atomic Scientists |date=23 September 2014 |archive-url=https://web.archive.org/web/20200711032006/https://thebulletin.org/2014/09/the-global-warming-hiatus/ |archive-date=11 July 2020 |url-status=live}}
			* '']''
			** {{cite web |ref={{harvid|Carbon Brief, 4 Jan|2017}} |date=4 January 2017 |last=Yeo |first=Sophie |title=Clean energy: The challenge of achieving a 'just transition' for workers |website=Carbon Brief |url=https://www.carbonbrief.org/clean-energy-the-challenge-of-achieving-a-just-transition-for-workers |access-date=18 May 2020}}
			** {{cite web |ref={{harvid|Carbon Brief, 19 June|2017}} |url=https://www.carbonbrief.org/billions-face-deadly-threshold-heat-extremes-2100-study/ |title=Billions to face 'deadly threshold' of heat extremes by 2100, finds study |last=McSweeney |first=Robert M. |date=19 June 2017 |website=Carbon Brief}}
			** {{cite web |ref={{harvid|Carbon Brief, 21 November|2017}} |last=Yeo |first=Sophie |date=21 November 2017 |title=Explainer: Why a UN climate deal on HFCs matters |url=https://www.carbonbrief.org/explainer-why-a-un-climate-deal-on-hfcs-matters |access-date=10 January 2021 |url-status=live |website=Carbon Brief |archive-date=May 1, 2024 |archive-url=https://web.archive.org/web/20240501225407/https://www.carbonbrief.org/explainer-why-a-un-climate-deal-on-hfcs-matters/}}
			** {{cite web |ref={{harvid|Carbon Brief, 15 January|2018}} |date=15 January 2018 |last1=McSweeney |first1=Robert M. |last2=Hausfather |first2=Zeke |title=Q&A: How do climate models work? |website=Carbon Brief |url=https://www.carbonbrief.org/qa-how-do-climate-models-work |access-date=2 March 2019 |archive-url=https://web.archive.org/web/20190305004530/https://www.carbonbrief.org/qa-how-do-climate-models-work |archive-date=5 March 2019 |url-status=live}}
			** {{cite web |ref={{harvid|Carbon Brief, 19 April|2018}} |date=19 April 2018 |last1=Hausfather |first1=Zeke |title=Explainer: How 'Shared Socioeconomic Pathways' explore future climate change |website=Carbon Brief |url=https://www.carbonbrief.org/explainer-how-shared-socioeconomic-pathways-explore-future-climate-change |access-date=20 July 2019}}
			** {{cite web |ref={{harvid|Carbon Brief, 8 October|2018}} |date=8 October 2018 |last1=Hausfather |first1=Zeke |title=Analysis: Why the IPCC 1.5C report expanded the carbon budget |url=https://www.carbonbrief.org/analysis-why-the-ipcc-1-5c-report-expanded-the-carbon-budget |access-date=28 July 2020 |website=Carbon Brief}}
			** {{cite web |ref={{harvid|Carbon Brief, 7 January|2020}} |url=https://www.carbonbrief.org/media-reaction-australias-bushfires-and-climate-change |title=Media reaction: Australia's bushfires and climate change |last1=Dunne |first1=Daisy |last2=Gabbatiss |first2=Josh |last3=McSweeney |first3=Robert |date=7 January 2020 |website=Carbon Brief |access-date=11 January 2020}}
			** {{cite web |ref={{Harvid|Carbon Brief, 10 February|2020}} |last=McSweeney |first=Robert |title=Nine Tipping Points That Could Be Triggered by Climate Change |url=https://www.carbonbrief.org/explainer-nine-tipping-points-that-could-be-triggered-by-climate-change/ |website=Carbon Brief | date=10 February 2020 |access-date=27 May 2022 |archive-date=October 7, 2024 |archive-url=https://web.archive.org/web/20241007002119/https://www.carbonbrief.org/explainer-nine-tipping-points-that-could-be-triggered-by-climate-change/ |url-status=live}}
			** {{Cite web |ref={{harvid|Carbon Brief, 16 October|2021}} |last1=Gabbatiss|first1=Josh|last2=Tandon|first2=Ayesha|date=4 October 2021|title=In-depth Q&A: What is 'climate justice'?|url=https://www.carbonbrief.org/in-depth-qa-what-is-climate-justice|access-date=16 October 2021|website=Carbon Brief|language=en}}
			** {{cite web |ref={{harvid|Carbon Brief, 3 July|2023}} |url=https://www.carbonbrief.org/analysis-how-low-sulphur-shipping-rules-are-affecting-global-warming/ |title=Analysis: How low-sulphur shipping rules are affecting global warming |last1=Hausfather |first1=Zeke |last2=Forster |first2=Piers |author-link2=Piers Forster |date=3 July 2023 |website=Carbon Brief |access-date=2 November 2024}}
			* '']''
			** {{Cite web |ref={{harvid|Climate.gov, 23 June|2022}} |last=Lindsey |first=Rebecca |title=Climate Change: Atmospheric Carbon Dioxide |website=Climate.gov |url=https://www.climate.gov/news-features/understanding-climate/climate-change-atmospheric-carbon-dioxide |date=23 June 2022 |access-date=7 May 2023}}
			* '']''
			** {{cite news |ref={{harvid|Deutsche Welle, 22 June|2019}} |last1=Ruiz |first1=Irene Banos |title=Climate Action: Can We Change the Climate From the Grassroots Up? |url=https://www.ecowatch.com/climate-action-grassroots-2638915946.html |access-date=23 June 2019 |publisher=Deutsche Welle |date=22 June 2019 |archive-url=https://web.archive.org/web/20190623124154/https://www.ecowatch.com/climate-action-grassroots-2638915946.html |archive-date=23 June 2019 |url-status=live}}
			* '']''
			** {{cite web |ref={{harvid|EPA|2016}} |title=Myths vs. Facts: Denial of Petitions for Reconsideration of the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act |publisher=U.S. Environmental Protection Agency |date=10 September 2020 |url=https://www.epa.gov/ghgemissions/myths-vs-facts-denial-petitions-reconsideration-endangerment-and-cause-or-contribute |access-date=7 August 2017 |archive-url=https://web.archive.org/web/20210523211147/https://www.epa.gov/ghgemissions/myths-vs-facts-denial-petitions-reconsideration-endangerment-and-cause-or-contribute |archive-date=23 May 2021}}
			** {{cite web |ref={{harvid|EPA|2019}} |url=https://www.epa.gov/ghgemissions/global-greenhouse-gas-emissions-data |title=Global Greenhouse Gas Emissions Data |publisher=U.S. Environmental Protection Agency |date=10 September 2024 |access-date=8 August 2020 |archive-url=https://web.archive.org/web/20200218125157/https://www.epa.gov/ghgemissions/global-greenhouse-gas-emissions-data |archive-date=18 February 2020 |url-status=live}}
			** {{cite web |ref={{harvid|EPA|2020}} |url=https://www.epa.gov/ghgemissions/overview-greenhouse-gases |title=Overview of Greenhouse Gases |publisher=U.S. Environmental Protection Agency |date=11 April 2024 |access-date=15 September 2020 |archive-date=October 9, 2024 |archive-url=https://web.archive.org/web/20241009203854/https://www.epa.gov/ghgemissions/overview-greenhouse-gases}}
			* '']''
			** {{cite web |ref={{harvid|EUobserver, 20 December|2009}} |date=20 December 2009 |title=Copenhagen failure 'disappointing', 'shameful' |website=EUobserver |access-date=12 April 2019 |url=https://euobserver.com/environment/29181 |archive-url=https://web.archive.org/web/20190412092312/https://euobserver.com/environment/29181 |archive-date=12 April 2019 |url-status=live}}
			* '']''
			** {{cite web |ref={{harvid|European Parliament, February|2020}} |date=February 2020 |first=M. |last=Ciucci |title=Renewable Energy |website=European Parliament |url=https://www.europarl.europa.eu/factsheets/en/sheet/70/renewable-energy |access-date=3 June 2020}}
			* '']''<!--
			|issn=0261-3077 - not needed, nor location.
			The parameters for harvid should match the first two parameters
			used in harvnb for the short-cite in the text. -->
			** {{cite news |ref={{harvid|The Guardian, 19 March|2019}} |last=Carrington |first=Damian |date=19 March 2019 |title=School climate strikes: 1.4 million people took part, say campaigners |newspaper=The Guardian |url=https://www.theguardian.com/environment/2019/mar/19/school-climate-strikes-more-than-1-million-took-part-say-campaigners-greta-thunberg |access-date=12 April 2019 |archive-url=https://web.archive.org/web/20190320122303/https://www.theguardian.com/environment/2019/mar/19/school-climate-strikes-more-than-1-million-took-part-say-campaigners-greta-thunberg |archive-date=20 March 2019 |url-status=live}}
			** {{cite news |ref={{harvid|The Guardian, 28 November|2019}} |url=https://www.theguardian.com/world/2019/nov/28/eu-parliament-declares-climate-emergency |title='Our house is on fire': EU parliament declares climate emergency |last=Rankin |first=Jennifer |date=28 November 2019 |work=The Guardian |access-date=28 November 2019 |issn=0261-3077}}
			** {{cite news |ref={{harvid|The Guardian, 19 February|2020}} |last=Watts |first=Jonathan |date=19 February 2020 |title=Oil and gas firms 'have had far worse climate impact than thought' |url=https://www.theguardian.com/environment/2020/feb/19/oil-gas-industry-far-worse-climate-impact-than-thought-fossil-fuels-methane |newspaper=The Guardian}}
			** {{cite web |ref={{harvid|The Guardian, 28 October|2020}} |date=28 October 2020 |last=McCurry |first=Justin |title=South Korea vows to go carbon neutral by 2050 to fight climate emergency |url=http://www.theguardian.com/world/2020/oct/28/south-korea-vows-to-go-carbon-neutral-by-2050-to-fight-climate-emergency |access-date=6 December 2020 |work=The Guardian}}
			* '']''
			** {{cite web |ref={{harvid|IEA – Projected Costs of Generating Electricity 2020}} |title=Projected Costs of Generating Electricity 2020 |website=IEA |date=9 December 2020 |url=https://www.iea.org/reports/projected-costs-of-generating-electricity-2020 |access-date=4 April 2022}}
			* '']''
			** {{cite news |ref={{harvid|NASA, 28 May|2013}} |year=2013 |title=Arctic amplification |publisher=NASA |url=https://climate.nasa.gov/news/927/arctic-amplification |archive-url=https://web.archive.org/web/20180731054007/https://climate.nasa.gov/news/927/arctic-amplification/ |archive-date=31 July 2018 |url-status=live}}
			** {{cite web |ref={{harvid|NASA, 5 December|2008}} |date=5 December 2008 |last=Conway |first=Erik M. |author-link=Erik M. Conway |title=What's in a Name? Global Warming vs. Climate Change |publisher=NASA |url=http://www.nasa.gov/topics/earth/features/climate_by_any_other_name.html |archive-url=https://web.archive.org/web/20100809221926/http://www.nasa.gov/topics/earth/features/climate_by_any_other_name.html |archive-date=9 August 2010}}
			** {{cite web |date=January 2016 |last1=Shaftel |first1=Holly |title=What's in a name? Weather, global warming and climate change |website=NASA Climate Change: Vital Signs of the Planet |url=https://climate.nasa.gov/resources/global-warming |access-date=12 October 2018 |archive-url=https://web.archive.org/web/20180928145703/https://climate.nasa.gov/resources/global-warming/ |archive-date=28 September 2018 |url-status=dead}}
			** {{cite web |ref={{harvid|NASA, 7 July|2020}} |date=7 July 2020 |editor-last=Shaftel |editor-first=Holly |editor2-last=Jackson |editor2-first=Randal |editor3-last=Callery |editor3-first=Susan |editor4-last=Bailey |editor4-first=Daniel |title=Overview: Weather, Global Warming and Climate Change |url=https://climate.nasa.gov/resources/global-warming-vs-climate-change |access-date=14 July 2020 |website=Climate Change: Vital Signs of the Planet}}
			* '']''
			** {{cite web |ref={{harvid|National Conference of State Legislators, 17 April|2020}} |date=17 April 2020 |title=State Renewable Portfolio Standards and Goals |website=National Conference of State Legislators |url=https://www.ncsl.org/research/energy/renewable-portfolio-standards.aspx |access-date=3 June 2020}}
			* '']''
			** {{cite web |ref={{harvid|National Geographic, 13 August|2019}} |last=Welch |first=Craig |url=https://www.nationalgeographic.com/environment/2019/08/arctic-permafrost-is-thawing-it-could-speed-up-climate-change-feature/ |archive-url=https://archive.today/20190814144104/https://www.nationalgeographic.com/environment/2019/08/arctic-permafrost-is-thawing-it-could-speed-up-climate-change-feature/ |url-status=dead |archive-date=14 August 2019 |title=Arctic permafrost is thawing fast. That affects us all. |date=13 August 2019 |website=National Geographic |access-date=25 August 2019}}
			* '']''
			** {{cite web |first=James R. |last=Fleming |title=Climate Change and Anthropogenic Greenhouse Warming: A Selection of Key Articles, 1824–1995, with Interpretive Essays |website=National Science Digital Library Project Archive PALE:ClassicArticles |date=17 March 2008 |url=http://nsdl.library.cornell.edu/websites/index.php/PALE_ClassicArticles/GlobalWarming.html |access-date=7 October 2019}}
			* '']''
			** {{cite web |ref={{harvid|Natural Resources Defense Council, 29 September|2017}} |date=29 September 2017 |title=What Is the Clean Power Plan? |website=Natural Resources Defense Council |url=https://www.nrdc.org/stories/how-clean-power-plan-works-and-why-it-matters |access-date=3 August 2020}}
			* '']''
			** {{cite news |ref={{harvid|The New York Times, 25 May|2015}} |title=Paris Can't Be Another Copenhagen |work=The New York Times |last=Rudd |first=Kevin |date=25 May 2015 |access-date=26 May 2015 |url=https://www.nytimes.com/2015/05/26/opinion/kevin-rudd-paris-cant-be-another-copenhagen.html |archive-url=https://web.archive.org/web/20180203110636/https://www.nytimes.com/2015/05/26/opinion/kevin-rudd-paris-cant-be-another-copenhagen.html |archive-date=3 February 2018 |url-status=live}}
			* '']''
			** {{cite web |ref={{harvid|NOAA, 10 July|2011}} |date=10 July 2011 |author=NOAA |url=https://www.climate.gov/news-features/understanding-climate/polar-opposites-arctic-and-antarctic |title=Polar Opposites: the Arctic and Antarctic |access-date=20 February 2019 |archive-url=https://web.archive.org/web/20190222152103/https://www.climate.gov/news-features/understanding-climate/polar-opposites-arctic-and-antarctic |archive-date=22 February 2019 |url-status=live}}
			** {{cite web |first=Amara |last=Huddleston |title=Happy 200th birthday to Eunice Foote, hidden climate science pioneer |website=NOAA Climate.gov |date=17 July 2019 |url=https://www.climate.gov/news-features/features/happy-200th-birthday-eunice-foote-hidden-climate-science-pioneer |access-date=8 October 2019}}
			* '']''
			** {{cite journal |date=15 January 2018 |last1=Ritchie |first1=Hannah |author1-link=Hannah Ritchie |last2=Roser |first2=Max |author2-link=Max Roser |title=Land Use |journal=Our World in Data |url=https://ourworldindata.org/land-use |access-date=1 December 2019}}
			** {{cite web |date=18 September 2020 |ref={{harvid|Our World in Data, 18 September|2020}} |last1=Ritchie |first1=Hannah |title=Sector by sector: where do global greenhouse gas emissions come from? |website=Our World in Data |url=https://ourworldindata.org/ghg-emissions-by-sector |access-date=28 October 2020}}
			** {{cite web |ref={{harvid|Our World in Data-Why did renewables become so cheap so fast?}} |date=2022 |last1=Roser |first1=Max |title=Why did renewables become so cheap so fast? |website=Our World in Data |url=https://ourworldindata.org/cheap-renewables-growth |access-date=4 April 2022}}
			* '']''
			** {{cite web |ref={{harvid|Pew|2020}} |first1=Moira
			|last1=Fagan |first2=Christine |last2=Huang |publisher=Pew Research Center |date=16 October 2020 |title=Many globally are as concerned about climate change as about the spread of infectious diseases |url=https://www.pewresearch.org/fact-tank/2020/10/16/many-globally-are-as-concerned-about-climate-change-as-about-the-spread-of-infectious-diseases/ |access-date=19 August 2021}}
			* '']''
			** {{cite web |ref={{harvid|Politico, 11 December|2019}} |url=https://www.politico.eu/article/the-commissions-green-deal-plan-unveiled/ |title=Europe's Green Deal plan unveiled |last1=Tamma |first1=Paola |last2=Schaart |first2=Eline |date=11 December 2019 |website=Politico |access-date=29 December 2019 |last3=Gurzu |first3=Anca}}
			* '']''
			** {{cite AV media |ref={{harvid|RIVM|2016}} |date=11 October 2016 |title=Documentary Sea Blind |medium=Dutch Television |language=nl |url=http://www.rivm.nl/en/Documents_and_publications/Common_and_Present/Newsmessages/2016/Documentary_Sea_Blind_on_Dutch_Television |access-date=26 February 2019 |publisher=RIVM: Netherlands National Institute for Public Health and the Environment |archive-url=https://web.archive.org/web/20180817055817/https://www.rivm.nl/en/Documents_and_publications/Common_and_Present/Newsmessages/2016/Documentary_Sea_Blind_on_Dutch_Television |archive-date=17 August 2018 |url-status=live}}
			* '']''
			** {{cite news |ref={{harvid|Salon, 25 September|2019}} |first=Evelyn |last=Leopold |title=How leaders planned to avert climate catastrophe at the UN (while Trump hung out in the basement) |url=https://www.salon.com/2019/09/25/how-serious-people-planned-to-avert-climate-catastrophe-at-the-un-while-trump-hung-out-in-the-basement_partner/ |date=25 September 2019 |website=Salon |access-date=20 November 2019}}
			* '']''
			** {{cite news |ref={{harvid|Gleick, 7 January|2017}} |last1=Gleick |first1=Peter |title=Statements on Climate Change from Major Scientific Academies, Societies, and Associations (January 2017 update) |date=7 January 2017 |access-date=2 April 2020 |url=https://scienceblogs.com/significantfigures/index.php/2017/01/07/statements-on-climate-change-from-major-scientific-academies-societies-and-associations-january-2017-update |work=ScienceBlogs}}
			* '']''
			** {{cite magazine |ref={{harvid|Scientific American, 29 April|2014}} |title=Indian Monsoons Are Becoming More Extreme |last=Ogburn |first=Stephanie Paige |date=29 April 2014 |url=https://www.scientificamerican.com/article/indian-monsoons-are-becoming-more-extreme/ |magazine=Scientific American |archive-url=https://web.archive.org/web/20180622193126/https://www.scientificamerican.com/article/indian-monsoons-are-becoming-more-extreme/ |archive-date=22 June 2018 |url-status=live}}
			* '']''
			** {{cite web |ref={{harvid|Smithsonian, 26 June|2016}} |url=https://www.smithsonianmag.com/smithsonian-institution/studying-climate-past-essential-preparing-todays-rapidly-changing-climate-180959595/ |title=Studying the Climate of the Past Is Essential for Preparing for Today's Rapidly Changing Climate |last=Wing |first=Scott L. |website=Smithsonian |access-date=8 November 2019 |date=29 June 2016}}
			* ''The Sustainability Consortium''
			** {{cite web |ref={{harvid|The Sustainability Consortium, 13 September|2018}} |website=The Sustainability Consortium |date=13 September 2018 |url=https://www.sustainabilityconsortium.org/2018/09/one-fourth-of-global-forest-loss-permanent-deforestation-is-not-slowing-down/ |title=One-Fourth of Global Forest Loss Permanent: Deforestation Is Not Slowing Down |access-date=1 December 2019}}
			* '']''
			** {{cite web |ref={{harvid|UNFCCC, "What are United Nations Climate Change Conferences?"}} |title=What are United Nations Climate Change Conferences? |website=UNFCCC |access-date=12 May 2019 |url=https://unfccc.int/process/conferences/what-are-united-nations-climate-change-conferences |archive-url=https://web.archive.org/web/20190512084017/https://unfccc.int/process/conferences/what-are-united-nations-climate-change-conferences |archive-date=12 May 2019 |url-status=live}}
			** {{cite web |ref={{harvid|UNFCCC, "What is the United Nations Framework Convention on Climate Change?"}} |title=What is the United Nations Framework Convention on Climate Change? |website=UNFCCC |url=https://unfccc.int/process-and-meetings/the-convention/what-is-the-united-nations-framework-convention-on-climate-change}}
			* '']''
			** {{cite web |ref={{harvid|Union of Concerned Scientists, 8 January|2017}} |date=8 January 2017 |title=Carbon Pricing 101 |website=Union of Concerned Scientists |url=https://www.ucsusa.org/resources/carbon-pricing-101 |access-date=15 May 2020}}
			* '']''
			** {{cite news |ref={{harvid|Vice, 2 May|2019}} |website=Vice |last1=Segalov |first1=Michael |title=The UK Has Declared a Climate Emergency: What Now? |url=https://www.vice.com/en_uk/article/evyxyn/uk-climate-emergency-what-does-it-mean |access-date=30 June 2019 |date=2 May 2019}}
			* '']''
			** {{cite web |ref={{harvid|The Verge, 27 December|2019}} |title=2019 was the year of 'climate emergency' declarations |last=Calma |first=Justine |date=27 December 2019 |website=The Verge |url=https://www.theverge.com/2019/12/27/21038949/climate-change-2019-emergency-declaration |access-date=28 March 2020}}
			* '']''
			** {{cite web |ref={{harvid|Vox, 20 September|2019}} |last1=Roberts |first1=D. |date=20 September 2019 |title=Getting to 100% renewables requires cheap energy storage. But how cheap? |website=Vox |url=https://www.vox.com/energy-and-environment/2019/8/9/20767886/renewable-energy-storage-cost-electricity |access-date=28 May 2020}}
			* '']''
			** {{cite web |ref={{harvid|WHO, Nov|2023}} |date=3 November 2023 |title=We must fight one of the world's biggest health threats: climate change |website=World Health Organization |url=https://www.who.int/news-room/commentaries/detail/we-must-fight-one-of-the-world-s-biggest-health-threats-climate-change |access-date=19 September 2024}}
			* '']''
			** {{cite journal |ref={{harvid|World Resources Institute, 8 August|2019}} |date=8 August 2019 |last1=Levin |first1=Kelly |title=How Effective Is Land At Removing Carbon Pollution? The IPCC Weighs In |website=World Resources institute |url=https://www.wri.org/blog/2019/08/how-effective-land-removing-carbon-pollution-ipcc-weighs |access-date=15 May 2020}}
			** {{cite journal |ref={{harvid|World Resources Institute, 8 December|2019}} |date=8 December 2019 |first1=Frances |last1=Seymour |first2=David |last2=Gibbs |title=Forests in the IPCC Special Report on Land Use: 7 Things to Know |url=https://www.wri.org/blog/2019/08/forests-ipcc-special-report-land-use-7-things-know/ |website=World Resources Institute}}
			* '']''
			** {{cite web |ref={{harvid|Yale Climate Connections, 2 November|2010}} |title=Yale Researcher Anthony Leiserowitz on Studying, Communicating with American Public |date=2 November 2010 |last=Peach |first=Sara |publisher=Yale Climate Connections |access-date=30 July 2018 |url=https://www.yaleclimateconnections.org/2010/11/communicating-with-american-public |archive-url=https://web.archive.org/web/20190207130823/https://www.yaleclimateconnections.org/2010/11/communicating-with-american-public/ |archive-date=7 February 2019 |url-status=live}}
			{{refend}}
			== External links ==
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Latest revision as of 17:32, 22 December 2024

Human-caused changes to climate on Earth This article is about the present-day human-induced rise in global temperatures. For natural historical climate trends, see Climate variability and change. "Global warming" redirects here. For other uses, see Climate change (disambiguation) and Global warming (disambiguation).

Present-day climate change includes both global warming—the ongoing increase in global average temperature—and its wider effects on Earth's climate. Climate change in a broader sense also includes previous long-term changes to Earth's climate. The current rise in global temperatures is driven by human activities, especially fossil fuel burning since the Industrial Revolution. Fossil fuel use, deforestation, and some agricultural and industrial practices release greenhouse gases. These gases absorb some of the heat that the Earth radiates after it warms from sunlight, warming the lower atmosphere. Carbon dioxide, the primary greenhouse gas driving global warming, has grown by about 50% and is at levels not seen for millions of years.

Climate change has an increasingly large impact on the environment. Deserts are expanding, while heat waves and wildfires are becoming more common. Amplified warming in the Arctic has contributed to thawing permafrost, retreat of glaciers and sea ice decline. Higher temperatures are also causing more intense storms, droughts, and other weather extremes. Rapid environmental change in mountains, coral reefs, and the Arctic is forcing many species to relocate or become extinct. Even if efforts to minimize future warming are successful, some effects will continue for centuries. These include ocean heating, ocean acidification and sea level rise.

Climate change threatens people with increased flooding, extreme heat, increased food and water scarcity, more disease, and economic loss. Human migration and conflict can also be a result. The World Health Organization calls climate change one of the biggest threats to global health in the 21st century. Societies and ecosystems will experience more severe risks without action to limit warming. Adapting to climate change through efforts like flood control measures or drought-resistant crops partially reduces climate change risks, although some limits to adaptation have already been reached. Poorer communities are responsible for a small share of global emissions, yet have the least ability to adapt and are most vulnerable to climate change.

Examples of some effects of climate change: Wildfire intensified by heat and drought, bleaching of corals occurring more often due to marine heatwaves, and worsening droughts compromising water supplies.

Many climate change impacts have been observed in the first decades of the 21st century, with 2023 the warmest on record at +1.48 °C (2.66 °F) since regular tracking began in 1850. Additional warming will increase these impacts and can trigger tipping points, such as melting all of the Greenland ice sheet. Under the 2015 Paris Agreement, nations collectively agreed to keep warming "well under 2 °C". However, with pledges made under the Agreement, global warming would still reach about 2.8 °C (5.0 °F) by the end of the century. Limiting warming to 1.5 °C would require halving emissions by 2030 and achieving net-zero emissions by 2050.

Fossil fuel use can be phased out by conserving energy and switching to energy sources that do not produce significant carbon pollution. These energy sources include wind, solar, hydro, and nuclear power. Cleanly generated electricity can replace fossil fuels for powering transportation, heating buildings, and running industrial processes. Carbon can also be removed from the atmosphere, for instance by increasing forest cover and farming with methods that capture carbon in soil.

Terminology

Before the 1980s it was unclear whether the warming effect of increased greenhouse gases was stronger than the cooling effect of airborne particulates in air pollution. Scientists used the term inadvertent climate modification to refer to human impacts on the climate at this time. In the 1980s, the terms global warming and climate change became more common, often being used interchangeably. Scientifically, global warming refers only to increased surface warming, while climate change describes both global warming and its effects on Earth's climate system, such as precipitation changes.

Climate change can also be used more broadly to include changes to the climate that have happened throughout Earth's history. Global warming—used as early as 1975—became the more popular term after NASA climate scientist James Hansen used it in his 1988 testimony in the U.S. Senate. Since the 2000s, climate change has increased usage. Various scientists, politicians and media may use the terms climate crisis or climate emergency to talk about climate change, and may use the term global heating instead of global warming.

Global temperature rise

Further information: Global surface temperature

Temperatures prior to present-day global warming

Main articles: Climate variability and change; Temperature record of the last 2,000 years; and Paleoclimatology

Over the last few million years the climate cycled through ice ages. One of the hotter periods was the Last Interglacial, around 125,000 years ago, where temperatures were between 0.5 °C and 1.5 °C warmer than before the start of global warming. This period saw sea levels 5 to 10 metres higher than today. The most recent glacial maximum 20,000 years ago was some 5–7 °C colder. This period has sea levels that were over 125 metres (410 ft) lower than today.

Temperatures stabilized in the current interglacial period beginning 11,700 years ago. This period also saw the start of agriculture. Historical patterns of warming and cooling, like the Medieval Warm Period and the Little Ice Age, did not occur at the same time across different regions. Temperatures may have reached as high as those of the late 20th century in a limited set of regions. Climate information for that period comes from climate proxies, such as trees and ice cores.

Warming since the Industrial Revolution

Around 1850 thermometer records began to provide global coverage. Between the 18th century and 1970 there was little net warming, as the warming impact of greenhouse gas emissions was offset by cooling from sulfur dioxide emissions. Sulfur dioxide causes acid rain, but it also produces sulfate aerosols in the atmosphere, which reflect sunlight and cause global dimming. After 1970, the increasing accumulation of greenhouse gases and controls on sulfur pollution led to a marked increase in temperature.

Ongoing changes in climate have had no precedent for several thousand years. Multiple independent datasets all show worldwide increases in surface temperature, at a rate of around 0.2 °C per decade. The 2014–2023 decade warmed to an average 1.19 °C compared to the pre-industrial baseline (1850–1900). Not every single year was warmer than the last: internal climate variability processes can make any year 0.2 °C warmer or colder than the average. From 1998 to 2013, negative phases of two such processes, Pacific Decadal Oscillation (PDO) and Atlantic Multidecadal Oscillation (AMO) caused a short slower period of warming called the "global warming hiatus". After the "hiatus", the opposite occurred, with years like 2023 exhibiting temperatures well above even the recent average. This is why the temperature change is defined in terms of a 20-year average, which reduces the noise of hot and cold years and decadal climate patterns, and detects the long-term signal.

A wide range of other observations reinforce the evidence of warming. The upper atmosphere is cooling, because greenhouse gases are trapping heat near the Earth's surface, and so less heat is radiating into space. Warming reduces average snow cover and forces the retreat of glaciers. At the same time, warming also causes greater evaporation from the oceans, leading to more atmospheric humidity, more and heavier precipitation. Plants are flowering earlier in spring, and thousands of animal species have been permanently moving to cooler areas.

Differences by region

Different regions of the world warm at different rates. The pattern is independent of where greenhouse gases are emitted, because the gases persist long enough to diffuse across the planet. Since the pre-industrial period, the average surface temperature over land regions has increased almost twice as fast as the global average surface temperature. This is because oceans lose more heat by evaporation and oceans can store a lot of heat. The thermal energy in the global climate system has grown with only brief pauses since at least 1970, and over 90% of this extra energy has been stored in the ocean. The rest has heated the atmosphere, melted ice, and warmed the continents.

The Northern Hemisphere and the North Pole have warmed much faster than the South Pole and Southern Hemisphere. The Northern Hemisphere not only has much more land, but also more seasonal snow cover and sea ice. As these surfaces flip from reflecting a lot of light to being dark after the ice has melted, they start absorbing more heat. Local black carbon deposits on snow and ice also contribute to Arctic warming. Arctic surface temperatures are increasing between three and four times faster than in the rest of the world. Melting of ice sheets near the poles weakens both the Atlantic and the Antarctic limb of thermohaline circulation, which further changes the distribution of heat and precipitation around the globe.

Future global temperatures

The World Meteorological Organization estimates there is an 80% chance that global temperatures will exceed 1.5 °C warming for at least one year between 2024 and 2028. The chance of the 5-year average being above 1.5 °C is almost half.

The IPCC expects the 20-year average global temperature to exceed +1.5 °C in the early 2030s. The IPCC Sixth Assessment Report (2021) included projections that by 2100 global warming is very likely to reach 1.0–1.8 °C under a scenario with very low emissions of greenhouse gases, 2.1–3.5 °C under an intermediate emissions scenario, or 3.3–5.7 °C under a very high emissions scenario. The warming will continue past 2100 in the intermediate and high emission scenarios, with future projections of global surface temperatures by year 2300 being similar to millions of years ago.

The remaining carbon budget for staying beneath certain temperature increases is determined by modelling the carbon cycle and climate sensitivity to greenhouse gases. According to UNEP, global warming can be kept below 1.5 °C with a 50% chance if emissions after 2023 do not exceed 200 gigatonnes of CO₂. This corresponds to around 4 years of current emissions. To stay under 2.0 °C, the carbon budget is 900 gigatonnes of CO₂, or 16 years of current emissions.

Causes of recent global temperature rise

Main article: Causes of climate change

The climate system experiences various cycles on its own which can last for years, decades or even centuries. For example, El Niño events cause short-term spikes in surface temperature while La Niña events cause short term cooling. Their relative frequency can affect global temperature trends on a decadal timescale. Other changes are caused by an imbalance of energy from external forcings. Examples of these include changes in the concentrations of greenhouse gases, solar luminosity, volcanic eruptions, and variations in the Earth's orbit around the Sun.

To determine the human contribution to climate change, unique "fingerprints" for all potential causes are developed and compared with both observed patterns and known internal climate variability. For example, solar forcing—whose fingerprint involves warming the entire atmosphere—is ruled out because only the lower atmosphere has warmed. Atmospheric aerosols produce a smaller, cooling effect. Other drivers, such as changes in albedo, are less impactful.

Greenhouse gases

Main articles: Greenhouse gas, Greenhouse gas emissions, Greenhouse effect, and Carbon dioxide in Earth's atmosphere

Greenhouse gases are transparent to sunlight, and thus allow it to pass through the atmosphere to heat the Earth's surface. The Earth radiates it as heat, and greenhouse gases absorb a portion of it. This absorption slows the rate at which heat escapes into space, trapping heat near the Earth's surface and warming it over time.

While water vapour (≈50%) and clouds (≈25%) are the biggest contributors to the greenhouse effect, they primarily change as a function of temperature and are therefore mostly considered to be feedbacks that change climate sensitivity. On the other hand, concentrations of gases such as CO₂ (≈20%), tropospheric ozone, CFCs and nitrous oxide are added or removed independently from temperature, and are therefore considered to be external forcings that change global temperatures.

Before the Industrial Revolution, naturally-occurring amounts of greenhouse gases caused the air near the surface to be about 33 °C warmer than it would have been in their absence. Human activity since the Industrial Revolution, mainly extracting and burning fossil fuels (coal, oil, and natural gas), has increased the amount of greenhouse gases in the atmosphere. In 2022, the concentrations of CO₂ and methane had increased by about 50% and 164%, respectively, since 1750. These CO₂ levels are higher than they have been at any time during the last 14 million years. Concentrations of methane are far higher than they were over the last 800,000 years.

Global human-caused greenhouse gas emissions in 2019 were equivalent to 59 billion tonnes of CO₂. Of these emissions, 75% was CO₂, 18% was methane, 4% was nitrous oxide, and 2% was fluorinated gases. CO₂ emissions primarily come from burning fossil fuels to provide energy for transport, manufacturing, heating, and electricity. Additional CO₂ emissions come from deforestation and industrial processes, which include the CO₂ released by the chemical reactions for making cement, steel, aluminum, and fertilizer. Methane emissions come from livestock, manure, rice cultivation, landfills, wastewater, and coal mining, as well as oil and gas extraction. Nitrous oxide emissions largely come from the microbial decomposition of fertilizer.

While methane only lasts in the atmosphere for an average of 12 years, CO₂ lasts much longer. The Earth's surface absorbs CO₂ as part of the carbon cycle. While plants on land and in the ocean absorb most excess emissions of CO₂ every year, that CO₂ is returned to the atmosphere when biological matter is digested, burns, or decays. Land-surface carbon sink processes, such as carbon fixation in the soil and photosynthesis, remove about 29% of annual global CO₂ emissions. The ocean has absorbed 20 to 30% of emitted CO₂ over the last two decades. CO₂ is only removed from the atmosphere for the long term when it is stored in the Earth's crust, which is a process that can take millions of years to complete.

Land surface changes

Around 30% of Earth's land area is largely unusable for humans (glaciers, deserts, etc.), 26% is forests, 10% is shrubland and 34% is agricultural land. Deforestation is the main land use change contributor to global warming, as the destroyed trees release CO₂, and are not replaced by new trees, removing that carbon sink. Between 2001 and 2018, 27% of deforestation was from permanent clearing to enable agricultural expansion for crops and livestock. Another 24% has been lost to temporary clearing under the shifting cultivation agricultural systems. 26% was due to logging for wood and derived products, and wildfires have accounted for the remaining 23%. Some forests have not been fully cleared, but were already degraded by these impacts. Restoring these forests also recovers their potential as a carbon sink.

Local vegetation cover impacts how much of the sunlight gets reflected back into space (albedo), and how much heat is lost by evaporation. For instance, the change from a dark forest to grassland makes the surface lighter, causing it to reflect more sunlight. Deforestation can also modify the release of chemical compounds that influence clouds, and by changing wind patterns. In tropic and temperate areas the net effect is to produce significant warming, and forest restoration can make local temperatures cooler. At latitudes closer to the poles, there is a cooling effect as forest is replaced by snow-covered (and more reflective) plains. Globally, these increases in surface albedo have been the dominant direct influence on temperature from land use change. Thus, land use change to date is estimated to have a slight cooling effect.

Other factors

Aerosols and clouds

Air pollution, in the form of aerosols, affects the climate on a large scale. Aerosols scatter and absorb solar radiation. From 1961 to 1990, a gradual reduction in the amount of sunlight reaching the Earth's surface was observed. This phenomenon is popularly known as global dimming, and is primarily attributed to sulfate aerosols produced by the combustion of fossil fuels with heavy sulfur concentrations like coal and bunker fuel. Smaller contributions come from black carbon (from combustion of fossil fuels and biomass), and from dust. Globally, aerosols have been declining since 1990 due to pollution controls, meaning that they no longer mask greenhouse gas warming as much.

Aerosols also have indirect effects on the Earth's energy budget. Sulfate aerosols act as cloud condensation nuclei and lead to clouds that have more and smaller cloud droplets. These clouds reflect solar radiation more efficiently than clouds with fewer and larger droplets. They also reduce the growth of raindrops, which makes clouds more reflective to incoming sunlight. Indirect effects of aerosols are the largest uncertainty in radiative forcing.

While aerosols typically limit global warming by reflecting sunlight, black carbon in soot that falls on snow or ice can contribute to global warming. Not only does this increase the absorption of sunlight, it also increases melting and sea-level rise. Limiting new black carbon deposits in the Arctic could reduce global warming by 0.2 °C by 2050. The effect of decreasing sulfur content of fuel oil for ships since 2020 is estimated to cause an additional 0.05 °C increase in global mean temperature by 2050.

Solar and volcanic activity

Further information: Solar activity and climate

As the Sun is the Earth's primary energy source, changes in incoming sunlight directly affect the climate system. Solar irradiance has been measured directly by satellites, and indirect measurements are available from the early 1600s onwards. Since 1880, there has been no upward trend in the amount of the Sun's energy reaching the Earth, in contrast to the warming of the lower atmosphere (the troposphere). The upper atmosphere (the stratosphere) would also be warming if the Sun was sending more energy to Earth, but instead, it has been cooling. This is consistent with greenhouse gases preventing heat from leaving the Earth's atmosphere.

Explosive volcanic eruptions can release gases, dust and ash that partially block sunlight and reduce temperatures, or they can send water vapour into the atmosphere, which adds to greenhouse gases and increases temperatures. These impacts on temperature only last for several years, because both water vapour and volcanic material have low persistence in the atmosphere. volcanic CO₂ emissions are more persistent, but they are equivalent to less than 1% of current human-caused CO₂ emissions. Volcanic activity still represents the single largest natural impact (forcing) on temperature in the industrial era. Yet, like the other natural forcings, it has had negligible impacts on global temperature trends since the Industrial Revolution.

Climate change feedbacks

Main articles: Climate change feedbacks and Climate sensitivity

The climate system's response to an initial forcing is shaped by feedbacks, which either amplify or dampen the change. Self-reinforcing or positive feedbacks increase the response, while balancing or negative feedbacks reduce it. The main reinforcing feedbacks are the water-vapour feedback, the ice–albedo feedback, and the net effect of clouds. The primary balancing mechanism is radiative cooling, as Earth's surface gives off more heat to space in response to rising temperature. In addition to temperature feedbacks, there are feedbacks in the carbon cycle, such as the fertilizing effect of CO₂ on plant growth. Feedbacks are expected to trend in a positive direction as greenhouse gas emissions continue, raising climate sensitivity.

These feedback processes alter the pace of global warming. For instance, warmer air can hold more moisture in the form of water vapour, which is itself a potent greenhouse gas. Warmer air can also make clouds higher and thinner, and therefore more insulating, increasing climate warming. The reduction of snow cover and sea ice in the Arctic is another major feedback, this reduces the reflectivity of the Earth's surface in the region and accelerates Arctic warming. This additional warming also contributes to permafrost thawing, which releases methane and CO₂ into the atmosphere.

Around half of human-caused CO₂ emissions have been absorbed by land plants and by the oceans. This fraction is not static and if future CO₂ emissions decrease, the Earth will be able to absorb up to around 70%. If they increase substantially, it'll still absorb more carbon than now, but the overall fraction will decrease to below 40%. This is because climate change increases droughts and heat waves that eventually inhibit plant growth on land, and soils will release more carbon from dead plants when they are warmer. The rate at which oceans absorb atmospheric carbon will be lowered as they become more acidic and experience changes in thermohaline circulation and phytoplankton distribution. Uncertainty over feedbacks, particularly cloud cover, is the major reason why different climate models project different magnitudes of warming for a given amount of emissions.

Modelling

Further information: Climate model and Climate change scenario

A climate model is a representation of the physical, chemical and biological processes that affect the climate system. Models include natural processes like changes in the Earth's orbit, historical changes in the Sun's activity, and volcanic forcing. Models are used to estimate the degree of warming future emissions will cause when accounting for the strength of climate feedbacks. Models also predict the circulation of the oceans, the annual cycle of the seasons, and the flows of carbon between the land surface and the atmosphere.

The physical realism of models is tested by examining their ability to simulate current or past climates. Past models have underestimated the rate of Arctic shrinkage and underestimated the rate of precipitation increase. Sea level rise since 1990 was underestimated in older models, but more recent models agree well with observations. The 2017 United States-published National Climate Assessment notes that "climate models may still be underestimating or missing relevant feedback processes". Additionally, climate models may be unable to adequately predict short-term regional climatic shifts.

A subset of climate models add societal factors to a physical climate model. These models simulate how population, economic growth, and energy use affect—and interact with—the physical climate. With this information, these models can produce scenarios of future greenhouse gas emissions. This is then used as input for physical climate models and carbon cycle models to predict how atmospheric concentrations of greenhouse gases might change. Depending on the socioeconomic scenario and the mitigation scenario, models produce atmospheric CO₂ concentrations that range widely between 380 and 1400 ppm.

Impacts

Main article: Effects of climate change

Environmental effects

Further information: Effects of climate change on oceans and Effects of climate change on the water cycle

The environmental effects of climate change are broad and far-reaching, affecting oceans, ice, and weather. Changes may occur gradually or rapidly. Evidence for these effects comes from studying climate change in the past, from modelling, and from modern observations. Since the 1950s, droughts and heat waves have appeared simultaneously with increasing frequency. Extremely wet or dry events within the monsoon period have increased in India and East Asia. Monsoonal precipitation over the Northern Hemisphere has increased since 1980. The rainfall rate and intensity of hurricanes and typhoons is likely increasing, and the geographic range likely expanding poleward in response to climate warming. Frequency of tropical cyclones has not increased as a result of climate change.

Global sea level is rising as a consequence of thermal expansion and the melting of glaciers and ice sheets. Sea level rise has increased over time, reaching 4.8 cm per decade between 2014 and 2023. Over the 21st century, the IPCC projects 32–62 cm of sea level rise under a low emission scenario, 44–76 cm under an intermediate one and 65–101 cm under a very high emission scenario. Marine ice sheet instability processes in Antarctica may add substantially to these values, including the possibility of a 2-meter sea level rise by 2100 under high emissions.

Climate change has led to decades of shrinking and thinning of the Arctic sea ice. While ice-free summers are expected to be rare at 1.5 °C degrees of warming, they are set to occur once every three to ten years at a warming level of 2 °C. Higher atmospheric CO₂ concentrations cause more CO₂ to dissolve in the oceans, which is making them more acidic. Because oxygen is less soluble in warmer water, its concentrations in the ocean are decreasing, and dead zones are expanding.

Tipping points and long-term impacts

Main article: Tipping points in the climate system

Greater degrees of global warming increase the risk of passing through 'tipping points'—thresholds beyond which certain major impacts can no longer be avoided even if temperatures return to their previous state. For instance, the Greenland ice sheet is already melting, but if global warming reaches levels between 1.7 °C and 2.3 °C, its melting will continue until it fully disappears. If the warming is later reduced to 1.5 °C or less, it will still lose a lot more ice than if the warming was never allowed to reach the threshold in the first place. While the ice sheets would melt over millennia, other tipping points would occur faster and give societies less time to respond. The collapse of major ocean currents like the Atlantic meridional overturning circulation (AMOC), and irreversible damage to key ecosystems like the Amazon rainforest and coral reefs can unfold in a matter of decades.

The long-term effects of climate change on oceans include further ice melt, ocean warming, sea level rise, ocean acidification and ocean deoxygenation. The timescale of long-term impacts are centuries to millennia due to CO₂'s long atmospheric lifetime. The result is an estimated total sea level rise of 2.3 metres per degree Celsius (4.2 ft/°F) after 2000 years. Oceanic CO₂ uptake is slow enough that ocean acidification will also continue for hundreds to thousands of years. Deep oceans (below 2,000 metres (6,600 ft)) are also already committed to losing over 10% of their dissolved oxygen by the warming which occurred to date. Further, the West Antarctic ice sheet appears committed to practically irreversible melting, which would increase the sea levels by at least 3.3 m (10 ft 10 in) over approximately 2000 years.

Nature and wildlife

Further information: Effects of climate change on oceans and Effects of climate change on biomes

Recent warming has driven many terrestrial and freshwater species poleward and towards higher altitudes. For instance, the range of hundreds of North American birds has shifted northward at an average rate of 1.5 km/year over the past 55 years. Higher atmospheric CO₂ levels and an extended growing season have resulted in global greening. However, heatwaves and drought have reduced ecosystem productivity in some regions. The future balance of these opposing effects is unclear. A related phenomenon driven by climate change is woody plant encroachment, affecting up to 500 million hectares globally. Climate change has contributed to the expansion of drier climate zones, such as the expansion of deserts in the subtropics. The size and speed of global warming is making abrupt changes in ecosystems more likely. Overall, it is expected that climate change will result in the extinction of many species.

The oceans have heated more slowly than the land, but plants and animals in the ocean have migrated towards the colder poles faster than species on land. Just as on land, heat waves in the ocean occur more frequently due to climate change, harming a wide range of organisms such as corals, kelp, and seabirds. Ocean acidification makes it harder for marine calcifying organisms such as mussels, barnacles and corals to produce shells and skeletons; and heatwaves have bleached coral reefs. Harmful algal blooms enhanced by climate change and eutrophication lower oxygen levels, disrupt food webs and cause great loss of marine life. Coastal ecosystems are under particular stress. Almost half of global wetlands have disappeared due to climate change and other human impacts. Plants have come under increased stress from damage by insects.

Climate change impacts on the environment

Ecological collapse. Coral bleaching from thermal stress has damaged the Great Barrier Reef and threatens coral reefs worldwide. Extreme weather. Drought and high temperatures worsened the 2020 bushfires in Australia. Arctic warming. Permafrost thaws undermine infrastructure and release methane, a greenhouse gas. Habitat destruction. Many arctic animals rely on sea ice, which has been disappearing in a warming Arctic. Pest propagation. Mild winters allow more pine beetles to survive to kill large swaths of forest.

Humans

Main article: Effects of climate change

The effects of climate change are impacting humans everywhere in the world. Impacts can be observed on all continents and ocean regions, with low-latitude, less developed areas facing the greatest risk. Continued warming has potentially "severe, pervasive and irreversible impacts" for people and ecosystems. The risks are unevenly distributed, but are generally greater for disadvantaged people in developing and developed countries.

Health and food

Main articles: Effects of climate change on agriculture § Global food security and undernutrition, and Effects of climate change on human health

The World Health Organization calls climate change one of the biggest threats to global health in the 21st century. Scientists have warned about the irreversible harms it poses. Extreme weather events affect public health, and food and water security. Temperature extremes lead to increased illness and death. Climate change increases the intensity and frequency of extreme weather events. It can affect transmission of infectious diseases, such as dengue fever and malaria. According to the World Economic Forum, 14.5 million more deaths are expected due to climate change by 2050. 30% of the global population currently live in areas where extreme heat and humidity are already associated with excess deaths. By 2100, 50% to 75% of the global population would live in such areas.

While total crop yields have been increasing in the past 50 years due to agricultural improvements, climate change has already decreased the rate of yield growth. Fisheries have been negatively affected in multiple regions. While agricultural productivity has been positively affected in some high latitude areas, mid- and low-latitude areas have been negatively affected. According to the World Economic Forum, an increase in drought in certain regions could cause 3.2 million deaths from malnutrition by 2050 and stunting in children. With 2 °C warming, global livestock headcounts could decline by 7–10% by 2050, as less animal feed will be available. If the emissions continue to increase for the rest of century, then over 9 million climate-related deaths would occur annually by 2100.

Livelihoods and inequality

Further information: Economic analysis of climate change and Climate security

Economic damages due to climate change may be severe and there is a chance of disastrous consequences. Severe impacts are expected in South-East Asia and sub-Saharan Africa, where most of the local inhabitants are dependent upon natural and agricultural resources. Heat stress can prevent outdoor labourers from working. If warming reaches 4 °C then labour capacity in those regions could be reduced by 30 to 50%. The World Bank estimates that between 2016 and 2030, climate change could drive over 120 million people into extreme poverty without adaptation.

Inequalities based on wealth and social status have worsened due to climate change. Major difficulties in mitigating, adapting to, and recovering from climate shocks are faced by marginalized people who have less control over resources. Indigenous people, who are subsistent on their land and ecosystems, will face endangerment to their wellness and lifestyles due to climate change. An expert elicitation concluded that the role of climate change in armed conflict has been small compared to factors such as socio-economic inequality and state capabilities.

While women are not inherently more at risk from climate change and shocks, limits on women's resources and discriminatory gender norms constrain their adaptive capacity and resilience. For example, women's work burdens, including hours worked in agriculture, tend to decline less than men's during climate shocks such as heat stress.

Climate migration

Main article: Climate migration

Low-lying islands and coastal communities are threatened by sea level rise, which makes urban flooding more common. Sometimes, land is permanently lost to the sea. This could lead to statelessness for people in island nations, such as the Maldives and Tuvalu. In some regions, the rise in temperature and humidity may be too severe for humans to adapt to. With worst-case climate change, models project that almost one-third of humanity might live in Sahara-like uninhabitable and extremely hot climates.

These factors can drive climate or environmental migration, within and between countries. More people are expected to be displaced because of sea level rise, extreme weather and conflict from increased competition over natural resources. Climate change may also increase vulnerability, leading to "trapped populations" who are not able to move due to a lack of resources.

Climate change impacts on people

Environmental migration. Sparser rainfall leads to desertification that harms agriculture and can displace populations. Shown: Telly, Mali (2008). Agricultural changes. Droughts, rising temperatures, and extreme weather negatively impact agriculture. Shown: Texas, US (2013). Tidal flooding. Sea-level rise increases flooding in low-lying coastal regions. Shown: Venice, Italy (2004). Storm intensification. Bangladesh after Cyclone Sidr (2007) is an example of catastrophic flooding from increased rainfall. Heat wave intensification. Events like the 2022 Southern Cone heat wave are becoming more common.

Reducing and recapturing emissions

Further information: Climate change mitigation

Climate change can be mitigated by reducing the rate at which greenhouse gases are emitted into the atmosphere, and by increasing the rate at which carbon dioxide is removed from the atmosphere. To limit global warming to less than 1.5 °C global greenhouse gas emissions needs to be net-zero by 2050, or by 2070 with a 2 °C target. This requires far-reaching, systemic changes on an unprecedented scale in energy, land, cities, transport, buildings, and industry.

The United Nations Environment Programme estimates that countries need to triple their pledges under the Paris Agreement within the next decade to limit global warming to 2 °C. An even greater level of reduction is required to meet the 1.5 °C goal. With pledges made under the Paris Agreement as of 2024, there would be a 66% chance that global warming is kept under 2.8 °C by the end of the century (range: 1.9–3.7 °C, depending on exact implementation and technological progress). When only considering current policies, this raises to 3.1 °C. Globally, limiting warming to 2 °C may result in higher economic benefits than economic costs.

Although there is no single pathway to limit global warming to 1.5 or 2 °C, most scenarios and strategies see a major increase in the use of renewable energy in combination with increased energy efficiency measures to generate the needed greenhouse gas reductions. To reduce pressures on ecosystems and enhance their carbon sequestration capabilities, changes would also be necessary in agriculture and forestry, such as preventing deforestation and restoring natural ecosystems by reforestation.

Other approaches to mitigating climate change have a higher level of risk. Scenarios that limit global warming to 1.5 °C typically project the large-scale use of carbon dioxide removal methods over the 21st century. There are concerns, though, about over-reliance on these technologies, and environmental impacts. Solar radiation modification (SRM) is under discussion as a possible supplement to reductions in emissions. However, SRM raises significant ethical and global governance concerns, and its risks are not well understood.

Clean energy

Main articles: Sustainable energy and Sustainable transport

Renewable energy is key to limiting climate change. For decades, fossil fuels have accounted for roughly 80% of the world's energy use. The remaining share has been split between nuclear power and renewables (including hydropower, bioenergy, wind and solar power and geothermal energy). Fossil fuel use is expected to peak in absolute terms prior to 2030 and then to decline, with coal use experiencing the sharpest reductions. Renewables represented 86% of all new electricity generation installed in 2023. Other forms of clean energy, such as nuclear and hydropower, currently have a larger share of the energy supply. However, their future growth forecasts appear limited in comparison.

While solar panels and onshore wind are now among the cheapest forms of adding new power generation capacity in many locations, green energy policies are needed to achieve a rapid transition from fossil fuels to renewables. To achieve carbon neutrality by 2050, renewable energy would become the dominant form of electricity generation, rising to 85% or more by 2050 in some scenarios. Investment in coal would be eliminated and coal use nearly phased out by 2050.

Electricity generated from renewable sources would also need to become the main energy source for heating and transport. Transport can switch away from internal combustion engine vehicles and towards electric vehicles, public transit, and active transport (cycling and walking). For shipping and flying, low-carbon fuels would reduce emissions. Heating could be increasingly decarbonized with technologies like heat pumps.

There are obstacles to the continued rapid growth of clean energy, including renewables. Wind and solar produce energy intermittently and with seasonal variability. Traditionally, hydro dams with reservoirs and fossil fuel power plants have been used when variable energy production is low. Going forward, battery storage can be expanded, energy demand and supply can be matched, and long-distance transmission can smooth variability of renewable outputs. Bioenergy is often not carbon-neutral and may have negative consequences for food security. The growth of nuclear power is constrained by controversy around radioactive waste, nuclear weapon proliferation, and accidents. Hydropower growth is limited by the fact that the best sites have been developed, and new projects are confronting increased social and environmental concerns.

Low-carbon energy improves human health by minimizing climate change as well as reducing air pollution deaths, which were estimated at 7 million annually in 2016. Meeting the Paris Agreement goals that limit warming to a 2 °C increase could save about a million of those lives per year by 2050, whereas limiting global warming to 1.5 °C could save millions and simultaneously increase energy security and reduce poverty. Improving air quality also has economic benefits which may be larger than mitigation costs.

Energy conservation

Main articles: Efficient energy use and Energy conservation

Reducing energy demand is another major aspect of reducing emissions. If less energy is needed, there is more flexibility for clean energy development. It also makes it easier to manage the electricity grid, and minimizes carbon-intensive infrastructure development. Major increases in energy efficiency investment will be required to achieve climate goals, comparable to the level of investment in renewable energy. Several COVID-19 related changes in energy use patterns, energy efficiency investments, and funding have made forecasts for this decade more difficult and uncertain.

Strategies to reduce energy demand vary by sector. In the transport sector, passengers and freight can switch to more efficient travel modes, such as buses and trains, or use electric vehicles. Industrial strategies to reduce energy demand include improving heating systems and motors, designing less energy-intensive products, and increasing product lifetimes. In the building sector the focus is on better design of new buildings, and higher levels of energy efficiency in retrofitting. The use of technologies like heat pumps can also increase building energy efficiency.

Agriculture and industry

See also: Sustainable agriculture and Green industrial policy

Agriculture and forestry face a triple challenge of limiting greenhouse gas emissions, preventing the further conversion of forests to agricultural land, and meeting increases in world food demand. A set of actions could reduce agriculture and forestry-based emissions by two-thirds from 2010 levels. These include reducing growth in demand for food and other agricultural products, increasing land productivity, protecting and restoring forests, and reducing greenhouse gas emissions from agricultural production.

On the demand side, a key component of reducing emissions is shifting people towards plant-based diets. Eliminating the production of livestock for meat and dairy would eliminate about 3/4ths of all emissions from agriculture and other land use. Livestock also occupy 37% of ice-free land area on Earth and consume feed from the 12% of land area used for crops, driving deforestation and land degradation.

Steel and cement production are responsible for about 13% of industrial CO₂ emissions. In these industries, carbon-intensive materials such as coke and lime play an integral role in the production, so that reducing CO₂ emissions requires research into alternative chemistries. Where energy production or CO₂-intensive heavy industries continue to produce waste CO₂, technology can sometimes be used to capture and store most of the gas instead of releasing it to the atmosphere. This technology, carbon capture and storage (CCS), could have a critical but limited role in reducing emissions. It is relatively expensive and has been deployed only to an extent that removes around 0.1% of annual greenhouse gas emissions.

Carbon dioxide removal

Main articles: Carbon dioxide removal and Carbon sequestration

Natural carbon sinks can be enhanced to sequester significantly larger amounts of CO₂ beyond naturally occurring levels. Reforestation and afforestation (planting forests where there were none before) are among the most mature sequestration techniques, although the latter raises food security concerns. Farmers can promote sequestration of carbon in soils through practices such as use of winter cover crops, reducing the intensity and frequency of tillage, and using compost and manure as soil amendments. Forest and landscape restoration yields many benefits for the climate, including greenhouse gas emissions sequestration and reduction. Restoration/recreation of coastal wetlands, prairie plots and seagrass meadows increases the uptake of carbon into organic matter. When carbon is sequestered in soils and in organic matter such as trees, there is a risk of the carbon being re-released into the atmosphere later through changes in land use, fire, or other changes in ecosystems.

The use of bioenergy in conjunction with carbon capture and storage (BECCS) can result in net negative emissions as CO₂ is drawn from the atmosphere. It remains highly uncertain whether carbon dioxide removal techniques will be able to play a large role in limiting warming to 1.5 °C. Policy decisions that rely on carbon dioxide removal increase the risk of global warming rising beyond international goals.

Adaptation

Main article: Climate change adaptation

Adaptation is "the process of adjustment to current or expected changes in climate and its effects". Without additional mitigation, adaptation cannot avert the risk of "severe, widespread and irreversible" impacts. More severe climate change requires more transformative adaptation, which can be prohibitively expensive. The capacity and potential for humans to adapt is unevenly distributed across different regions and populations, and developing countries generally have less. The first two decades of the 21st century saw an increase in adaptive capacity in most low- and middle-income countries with improved access to basic sanitation and electricity, but progress is slow. Many countries have implemented adaptation policies. However, there is a considerable gap between necessary and available finance.

Adaptation to sea level rise consists of avoiding at-risk areas, learning to live with increased flooding, and building flood controls. If that fails, managed retreat may be needed. There are economic barriers for tackling dangerous heat impact. Avoiding strenuous work or having air conditioning is not possible for everybody. In agriculture, adaptation options include a switch to more sustainable diets, diversification, erosion control, and genetic improvements for increased tolerance to a changing climate. Insurance allows for risk-sharing, but is often difficult to get for people on lower incomes. Education, migration and early warning systems can reduce climate vulnerability. Planting mangroves or encouraging other coastal vegetation can buffer storms.

Ecosystems adapt to climate change, a process that can be supported by human intervention. By increasing connectivity between ecosystems, species can migrate to more favourable climate conditions. Species can also be introduced to areas acquiring a favourable climate. Protection and restoration of natural and semi-natural areas helps build resilience, making it easier for ecosystems to adapt. Many of the actions that promote adaptation in ecosystems, also help humans adapt via ecosystem-based adaptation. For instance, restoration of natural fire regimes makes catastrophic fires less likely, and reduces human exposure. Giving rivers more space allows for more water storage in the natural system, reducing flood risk. Restored forest acts as a carbon sink, but planting trees in unsuitable regions can exacerbate climate impacts.

There are synergies but also trade-offs between adaptation and mitigation. An example for synergy is increased food productivity, which has large benefits for both adaptation and mitigation. An example of a trade-off is that increased use of air conditioning allows people to better cope with heat, but increases energy demand. Another trade-off example is that more compact urban development may reduce emissions from transport and construction, but may also increase the urban heat island effect, exposing people to heat-related health risks.

Examples of adaptation methods

Mangrove planting and other habitat conservation can reduce coastal flooding. Seawalls to protect against storm surge worsened by sea level rise Green roofs to provide cooling in cities Selective breeding for drought-resistant crops

Policies and politics

See also: Politics of climate change and Climate change mitigation § Policies

Countries that are most vulnerable to climate change have typically been responsible for a small share of global emissions. This raises questions about justice and fairness. Limiting global warming makes it much easier to achieve the UN's Sustainable Development Goals, such as eradicating poverty and reducing inequalities. The connection is recognized in Sustainable Development Goal 13 which is to "take urgent action to combat climate change and its impacts". The goals on food, clean water and ecosystem protection have synergies with climate mitigation.

The geopolitics of climate change is complex. It has often been framed as a free-rider problem, in which all countries benefit from mitigation done by other countries, but individual countries would lose from switching to a low-carbon economy themselves. Sometimes mitigation also has localized benefits though. For instance, the benefits of a coal phase-out to public health and local environments exceed the costs in almost all regions. Furthermore, net importers of fossil fuels win economically from switching to clean energy, causing net exporters to face stranded assets: fossil fuels they cannot sell.

Policy options

Further information: Climate policy

A wide range of policies, regulations, and laws are being used to reduce emissions. As of 2019, carbon pricing covers about 20% of global greenhouse gas emissions. Carbon can be priced with carbon taxes and emissions trading systems. Direct global fossil fuel subsidies reached $319 billion in 2017, and $5.2 trillion when indirect costs such as air pollution are priced in. Ending these can cause a 28% reduction in global carbon emissions and a 46% reduction in air pollution deaths. Money saved on fossil subsidies could be used to support the transition to clean energy instead. More direct methods to reduce greenhouse gases include vehicle efficiency standards, renewable fuel standards, and air pollution regulations on heavy industry. Several countries require utilities to increase the share of renewables in power production.

Climate justice

Policy designed through the lens of climate justice tries to address human rights issues and social inequality. According to proponents of climate justice, the costs of climate adaptation should be paid by those most responsible for climate change, while the beneficiaries of payments should be those suffering impacts. One way this can be addressed in practice is to have wealthy nations pay poorer countries to adapt.

Oxfam found that in 2023 the wealthiest 10% of people were responsible for 50% of global emissions, while the bottom 50% were responsible for just 8%. Production of emissions is another way to look at responsibility: under that approach, the top 21 fossil fuel companies would owe cumulative climate reparations of $5.4 trillion over the period 2025–2050. To achieve a just transition, people working in the fossil fuel sector would also need other jobs, and their communities would need investments.

International climate agreements

Further information: United Nations Framework Convention on Climate Change

Nearly all countries in the world are parties to the 1994 United Nations Framework Convention on Climate Change (UNFCCC). The goal of the UNFCCC is to prevent dangerous human interference with the climate system. As stated in the convention, this requires that greenhouse gas concentrations are stabilized in the atmosphere at a level where ecosystems can adapt naturally to climate change, food production is not threatened, and economic development can be sustained. The UNFCCC does not itself restrict emissions but rather provides a framework for protocols that do. Global emissions have risen since the UNFCCC was signed. Its yearly conferences are the stage of global negotiations.

The 1997 Kyoto Protocol extended the UNFCCC and included legally binding commitments for most developed countries to limit their emissions. During the negotiations, the G77 (representing developing countries) pushed for a mandate requiring developed countries to " the lead" in reducing their emissions, since developed countries contributed most to the accumulation of greenhouse gases in the atmosphere. Per-capita emissions were also still relatively low in developing countries and developing countries would need to emit more to meet their development needs.

The 2009 Copenhagen Accord has been widely portrayed as disappointing because of its low goals, and was rejected by poorer nations including the G77. Associated parties aimed to limit the global temperature rise to below 2 °C. The Accord set the goal of sending $100 billion per year to developing countries for mitigation and adaptation by 2020, and proposed the founding of the Green Climate Fund. As of 2020, only 83.3 billion were delivered. Only in 2023 the target is expected to be achieved.

In 2015 all UN countries negotiated the Paris Agreement, which aims to keep global warming well below 2.0 °C and contains an aspirational goal of keeping warming under 1.5 °C. The agreement replaced the Kyoto Protocol. Unlike Kyoto, no binding emission targets were set in the Paris Agreement. Instead, a set of procedures was made binding. Countries have to regularly set ever more ambitious goals and reevaluate these goals every five years. The Paris Agreement restated that developing countries must be financially supported. As of October 2021, 194 states and the European Union have signed the treaty and 191 states and the EU have ratified or acceded to the agreement.

The 1987 Montreal Protocol, an international agreement to phase out production of ozone-depleting gases, has had benefits for climate change mitigation. Several ozone-depleting gases like chlorofluorocarbons are powerful greenhouse gases, so banning their production and usage may have avoided a temperature rise of 0.5 °C–1.0 °C, as well as additional warming by preventing damage to vegetation from ultraviolet radiation. It is estimated that the agreement has been more effective at curbing greenhouse gas emissions than the Kyoto Protocol specifically designed to do so. The most recent amendment to the Montreal Protocol, the 2016 Kigali Amendment, committed to reducing the emissions of hydrofluorocarbons, which served as a replacement for banned ozone-depleting gases and are also potent greenhouse gases. Should countries comply with the amendment, a warming of 0.3 °C–0.5 °C is estimated to be avoided.

National responses

In 2019, the United Kingdom parliament became the first national government to declare a climate emergency. Other countries and jurisdictions followed suit. That same year, the European Parliament declared a "climate and environmental emergency". The European Commission presented its European Green Deal with the goal of making the EU carbon-neutral by 2050. In 2021, the European Commission released its "Fit for 55" legislation package, which contains guidelines for the car industry; all new cars on the European market must be zero-emission vehicles from 2035.

Major countries in Asia have made similar pledges: South Korea and Japan have committed to become carbon-neutral by 2050, and China by 2060. While India has strong incentives for renewables, it also plans a significant expansion of coal in the country. Vietnam is among very few coal-dependent, fast-developing countries that pledged to phase out unabated coal power by the 2040s or as soon as possible thereafter.

As of 2021, based on information from 48 national climate plans, which represent 40% of the parties to the Paris Agreement, estimated total greenhouse gas emissions will be 0.5% lower compared to 2010 levels, below the 45% or 25% reduction goals to limit global warming to 1.5 °C or 2 °C, respectively.

Society

Denial and misinformation

Further information: Climate change denial and Fossil fuels lobby

Public debate about climate change has been strongly affected by climate change denial and misinformation, which originated in the United States and has since spread to other countries, particularly Canada and Australia. Climate change denial has originated from fossil fuel companies, industry groups, conservative think tanks, and contrarian scientists. Like the tobacco industry, the main strategy of these groups has been to manufacture doubt about climate-change related scientific data and results. People who hold unwarranted doubt about climate change are called climate change "skeptics", although "contrarians" or "deniers" are more appropriate terms.

There are different variants of climate denial: some deny that warming takes place at all, some acknowledge warming but attribute it to natural influences, and some minimize the negative impacts of climate change. Manufacturing uncertainty about the science later developed into a manufactured controversy: creating the belief that there is significant uncertainty about climate change within the scientific community to delay policy changes. Strategies to promote these ideas include criticism of scientific institutions, and questioning the motives of individual scientists. An echo chamber of climate-denying blogs and media has further fomented misunderstanding of climate change.

Public awareness and opinion

Further information: Climate communication, Media coverage of climate change, and Public opinion on climate change

Climate change came to international public attention in the late 1980s. Due to media coverage in the early 1990s, people often confused climate change with other environmental issues like ozone depletion. In popular culture, the climate fiction movie The Day After Tomorrow (2004) and the Al Gore documentary An Inconvenient Truth (2006) focused on climate change.

Significant regional, gender, age and political differences exist in both public concern for, and understanding of, climate change. More highly educated people, and in some countries, women and younger people, were more likely to see climate change as a serious threat. College biology textbooks from the 2010s featured less content on climate change compared to those from the preceding decade, with decreasing emphasis on solutions. Partisan gaps also exist in many countries, and countries with high CO₂ emissions tend to be less concerned. Views on causes of climate change vary widely between countries. Concern has increased over time, and a majority of citizens in many countries now express a high level of worry about climate change, or view it as a global emergency. Higher levels of worry are associated with stronger public support for policies that address climate change.

Climate movement

Main articles: Climate movement and Climate change litigation

Climate protests demand that political leaders take action to prevent climate change. They can take the form of public demonstrations, fossil fuel divestment, lawsuits and other activities. Prominent demonstrations include the School Strike for Climate. In this initiative, young people across the globe have been protesting since 2018 by skipping school on Fridays, inspired by Swedish activist and then-teenager Greta Thunberg. Mass civil disobedience actions by groups like Extinction Rebellion have protested by disrupting roads and public transport.

Litigation is increasingly used as a tool to strengthen climate action from public institutions and companies. Activists also initiate lawsuits which target governments and demand that they take ambitious action or enforce existing laws on climate change. Lawsuits against fossil-fuel companies generally seek compensation for loss and damage.

History

For broader coverage of this topic, see History of climate change science.

Early discoveries

Scientists in the 19th century such as Alexander von Humboldt began to foresee the effects of climate change. In the 1820s, Joseph Fourier proposed the greenhouse effect to explain why Earth's temperature was higher than the Sun's energy alone could explain. Earth's atmosphere is transparent to sunlight, so sunlight reaches the surface where it is converted to heat. However, the atmosphere is not transparent to heat radiating from the surface, and captures some of that heat, which in turn warms the planet.

In 1856 Eunice Newton Foote demonstrated that the warming effect of the Sun is greater for air with water vapour than for dry air, and that the effect is even greater with carbon dioxide (CO₂). She concluded that "An atmosphere of that gas would give to our earth a high temperature..."

Starting in 1859, John Tyndall established that nitrogen and oxygen—together totalling 99% of dry air—are transparent to radiated heat. However, water vapour and gases such as methane and carbon dioxide absorb radiated heat and re-radiate that heat into the atmosphere. Tyndall proposed that changes in the concentrations of these gases may have caused climatic changes in the past, including ice ages.

Svante Arrhenius noted that water vapour in air continuously varied, but the CO₂ concentration in air was influenced by long-term geological processes. Warming from increased CO₂ levels would increase the amount of water vapour, amplifying warming in a positive feedback loop. In 1896, he published the first climate model of its kind, projecting that halving CO₂ levels could have produced a drop in temperature initiating an ice age. Arrhenius calculated the temperature increase expected from doubling CO₂ to be around 5–6 °C. Other scientists were initially sceptical and believed that the greenhouse effect was saturated so that adding more CO₂ would make no difference, and that the climate would be self-regulating. Beginning in 1938, Guy Stewart Callendar published evidence that climate was warming and CO₂ levels were rising, but his calculations met the same objections.

Development of a scientific consensus

See also: Scientific consensus on climate change

In the 1950s, Gilbert Plass created a detailed computer model that included different atmospheric layers and the infrared spectrum. This model predicted that increasing CO₂ levels would cause warming. Around the same time, Hans Suess found evidence that CO₂ levels had been rising, and Roger Revelle showed that the oceans would not absorb the increase. The two scientists subsequently helped Charles Keeling to begin a record of continued increase, which has been termed the "Keeling Curve". Scientists alerted the public, and the dangers were highlighted at James Hansen's 1988 Congressional testimony. The Intergovernmental Panel on Climate Change (IPCC), set up in 1988 to provide formal advice to the world's governments, spurred interdisciplinary research. As part of the IPCC reports, scientists assess the scientific discussion that takes place in peer-reviewed journal articles.

There is a near-complete scientific consensus that the climate is warming and that this is caused by human activities. As of 2019, agreement in recent literature reached over 99%. No scientific body of national or international standing disagrees with this view. Consensus has further developed that some form of action should be taken to protect people against the impacts of climate change. National science academies have called on world leaders to cut global emissions. The 2021 IPCC Assessment Report stated that it is "unequivocal" that climate change is caused by humans.

See also

• Climate change portal
• Anthropocene – proposed geological time interval in which humans are having significant geological impact
• List of climate scientists
• Charney Report

References

1. "GISS Surface Temperature Analysis (v4)". NASA. Retrieved 12 January 2024.
2. IPCC AR6 WG1 Summary for Policymakers 2021, SPM-7
3. Forster et al. 2024, p. 2626: "The indicators show that, for the 2014–2023 decade average, observed warming was 1.19 °C, of which 1.19 °C was human-induced."
4. ^ Lynas, Mark; Houlton, Benjamin Z.; Perry, Simon (19 October 2021). "Greater than 99% consensus on human caused climate change in the peer-reviewed scientific literature". Environmental Research Letters. 16 (11): 114005. Bibcode:2021ERL....16k4005L. doi:10.1088/1748-9326/ac2966. ISSN 1748-9326. S2CID 239032360.
5. ^ Our World in Data, 18 September 2020
6. IPCC AR6 WG1 Technical Summary 2021, p. 67: "Concentrations of CO₂, methane (CH₄), and nitrous oxide (N₂O) have increased to levels unprecedented in at least 800,000 years, and there is high confidence that current CO₂ concentrations have not been experienced for at least 2 million years."
7. • IPCC SRCCL 2019, p. 7: "Since the pre-industrial period, the land surface air temperature has risen nearly twice as much as the global average temperature (high confidence). Climate change... contributed to desertification and land degradation in many regions (high confidence)."
   • IPCC AR6 WG2 SPM 2022, p. 9: "Observed increases in areas burned by wildfires have been attributed to human-induced climate change in some regions (medium to high confidence)"
8. IPCC SROCC 2019, p. 16: "Over the last decades, global warming has led to widespread shrinking of the cryosphere, with mass loss from ice sheets and glaciers (very high confidence), reductions in snow cover (high confidence) and Arctic sea ice extent and thickness (very high confidence), and increased permafrost temperature (very high confidence)."
9. IPCC AR6 WG1 Ch11 2021, p. 1517
10. EPA (19 January 2017). "Climate Impacts on Ecosystems". Archived from the original on 27 January 2018. Retrieved 5 February 2019. Mountain and arctic ecosystems and species are particularly sensitive to climate change... As ocean temperatures warm and the acidity of the ocean increases, bleaching and coral die-offs are likely to become more frequent.
11. IPCC SR15 Ch1 2018, p. 64: "Sustained net zero anthropogenic emissions of CO₂ and declining net anthropogenic non-CO₂ radiative forcing over a multi-decade period would halt anthropogenic global warming over that period, although it would not halt sea level rise or many other aspects of climate system adjustment."
12. • Cattaneo et al. 2019
    • IPCC AR6 WG2 SPM 2022, p. 15
    • IPCC AR6 WG2 Technical Summary 2022, p. 53
13. ^ WHO, Nov 2023
14. IPCC AR6 WG2 SPM 2022, p. 19
15. • IPCC AR6 WG2 SPM 2022, pp. 21–26
    • IPCC AR6 WG2 Ch16 2022, p. 2504
    • IPCC AR6 SYR SPM 2023, pp. 8–9: "Effectiveness of adaptation in reducing climate risks is documented for specific contexts, sectors and regions (high confidence) ... Soft limits to adaptation are currently being experienced by small-scale farmers and households along some low-lying coastal areas (medium confidence) resulting from financial, governance, institutional and policy constraints (high confidence). Some tropical, coastal, polar and mountain ecosystems have reached hard adaptation limits (high confidence). Adaptation does not prevent all losses and damages, even with effective adaptation and before reaching soft and hard limits (high confidence)."
16. Tietjen, Bethany (2 November 2022). "Loss and damage: Who is responsible when climate change harms the world's poorest countries?". The Conversation. Retrieved 30 August 2023.
17. "Climate Change 2022: Impacts, Adaptation and Vulnerability". IPCC. 27 February 2022. Retrieved 30 August 2023.
18. Ivanova, Irina (2 June 2022). "California is rationing water amid its worst drought in 1,200 years". CBS News.
19. Poynting, Mark; Rivault, Erwan (10 January 2024). "2023 confirmed as world's hottest year on record". BBC. Retrieved 13 January 2024.
20. "Human, economic, environmental toll of climate change on the rise: WMO". United Nations. 21 April 2023. Retrieved 11 April 2024.
21. IPCC AR6 WG1 Technical Summary 2021, p. 71
22. ^ United Nations Environment Programme 2024, p. XVIII: "The full implementation and continuation of the level of mitigation effort implied by unconditional or conditional NDC scenarios lower these projections to 2.8 °C (range: 1.9–3.7) and 2.6 °C (range: 1.9–3.6), respectively. All with at least a 66 per cent chance."
23. IPCC SR15 Ch2 2018, pp. 95–96: "In model pathways with no or limited overshoot of 1.5 °C, global net anthropogenic CO₂ emissions decline by about 45% from 2010 levels by 2030 (40–60% interquartile range), reaching net zero around 2050 (2045–2055 interquartile range)"
24. IPCC SR15 2018, p. 17, SPM C.3: "All pathways that limit global warming to 1.5 °C with limited or no overshoot project the use of carbon dioxide removal (CDR) on the order of 100–1000 GtCO₂ over the 21st century. CDR would be used to compensate for residual emissions and, in most cases, achieve net negative emissions to return global warming to 1.5 °C following a peak (high confidence). CDR deployment of several hundreds of GtCO₂ is subject to multiple feasibility and sustainability constraints (high confidence)."
25. • IPCC AR5 WG3 Annex III 2014, p. 1335
    • IPCC AR6 WG3 Summary for Policymakers 2022, pp. 24–25
    • IPCC AR6 WG3 Technical Summary 2022, p. 89
26. IPCC AR6 WG3 Technical Summary 2022, p. 84: "Stringent emissions reductions at the level required for 2°C or 1.5°C are achieved through the increased electrification of buildings, transport, and industry, consequently all pathways entail increased electricity generation (high confidence)."
27. • IPCC SRCCL Summary for Policymakers 2019, p. 18
    • IPCC AR6 WG3 Summary for Policymakers 2022, pp. 24–25
    • IPCC AR6 WG3 Technical Summary 2022, p. 114
28. ^ NASA, 5 December 2008.
29. NASA, 7 July 2020
30. Shaftel 2016: " 'Climate change' and 'global warming' are often used interchangeably but have distinct meanings. ... Global warming refers to the upward temperature trend across the entire Earth since the early 20th century ... Climate change refers to a broad range of global phenomena ... include the increased temperature trends described by global warming."
31. Associated Press, 22 September 2015: "The terms global warming and climate change can be used interchangeably. Climate change is more accurate scientifically to describe the various effects of greenhouse gases on the world because it includes extreme weather, storms and changes in rainfall patterns, ocean acidification and sea level.".
32. IPCC AR5 SYR Glossary 2014, p. 120: "Climate change refers to a change in the state of the climate that can be identified (e.g., by using statistical tests) by changes in the mean and/or the variability of its properties and that persists for an extended period, typically decades or longer. Climate change may be due to natural internal processes or external forcings such as modulations of the solar cycles, volcanic eruptions and persistent anthropogenic changes in the composition of the atmosphere or in land use."
33. Broecker, Wallace S. (8 August 1975). "Climatic Change: Are We on the Brink of a Pronounced Global Warming?". Science. 189 (4201): 460–463. Bibcode:1975Sci...189..460B. doi:10.1126/science.189.4201.460. JSTOR 1740491. PMID 17781884. S2CID 16702835.
34. ^ Weart "The Public and Climate Change: The Summer of 1988", "News reporters gave only a little attention ...".
35. Joo et al. 2015.
36. Hodder & Martin 2009
37. BBC Science Focus Magazine, 3 February 2020
38. Neukom et al. 2019b.
39. "Global Annual Mean Surface Air Temperature Change". NASA. Retrieved 23 February 2020.
40. IPCC AR6 WG1 Ch2 2021, pp. 294, 296.
41. IPCC AR6 WG1 Ch2 2021, p. 366.
42. Marcott, S. A.; Shakun, J. D.; Clark, P. U.; Mix, A. C. (2013). "A reconstruction of regional and global temperature for the past 11,300 years". Science. 339 (6124): 1198–1201. Bibcode:2013Sci...339.1198M. doi:10.1126/science.1228026. PMID 23471405.
43. IPCC AR6 WG1 Ch2 2021, p. 296.
44. IPCC AR5 WG1 Ch5 2013, p. 386
45. Neukom et al. 2019a
46. IPCC SR15 Ch1 2018, p. 57: "This report adopts the 51-year reference period, 1850–1900 inclusive, assessed as an approximation of pre-industrial levels in AR5 ... Temperatures rose by 0.0 °C–0.2 °C from 1720–1800 to 1850–1900"
47. Hawkins et al. 2017, p. 1844
48. "Mean Monthly Temperature Records Across the Globe / Timeseries of Global Land and Ocean Areas at Record Levels for September from 1951-2023". NCEI.NOAA.gov. National Centers for Environmental Information (NCEI) of the National Oceanic and Atmospheric Administration (NOAA). September 2023. Archived from the original on 14 October 2023. (change "202309" in URL to see years other than 2023, and months other than 09=September)
49. Top 700 meters: Lindsey, Rebecca; Dahlman, Luann (6 September 2023). "Climate Change: Ocean Heat Content". climate.gov. National Oceanic and Atmospheric Administration (NOAA). Archived from the original on 29 October 2023. ● Top 2000 meters: "Ocean Warming / Latest Measurement: December 2022 / 345 (± 2) zettajoules since 1955". NASA.gov. National Aeronautics and Space Administration. Archived from the original on 20 October 2023.
50. IPCC AR5 WG1 Summary for Policymakers 2013, pp. 4–5: "Global-scale observations from the instrumental era began in the mid-19th century for temperature and other variables ... the period 1880 to 2012 ... multiple independently produced datasets exist."
51. Mooney, Chris; Osaka, Shannon (26 December 2023). "Is climate change speeding up? Here's what the science says". The Washington Post. Retrieved 18 January 2024.
52. "Global 'Sunscreen' Has Likely Thinned, Report NASA Scientists". NASA. 15 March 2007.
53. ^ Quaas, Johannes; Jia, Hailing; Smith, Chris; Albright, Anna Lea; Aas, Wenche; Bellouin, Nicolas; Boucher, Olivier; Doutriaux-Boucher, Marie; Forster, Piers M.; Grosvenor, Daniel; Jenkins, Stuart; Klimont, Zbigniew; Loeb, Norman G.; Ma, Xiaoyan; Naik, Vaishali; Paulot, Fabien; Stier, Philip; Wild, Martin; Myhre, Gunnar; Schulz, Michael (21 September 2022). "Robust evidence for reversal of the trend in aerosol effective climate forcing". Atmospheric Chemistry and Physics. 22 (18): 12221–12239. Bibcode:2022ACP....2212221Q. doi:10.5194/acp-22-12221-2022. hdl:20.500.11850/572791. S2CID 252446168.
54. IPCC AR6 WG1 Technical Summary 2021, p. 43
55. EPA 2016: "The U.S. Global Change Research Program, the National Academy of Sciences, and the Intergovernmental Panel on Climate Change (IPCC) have each independently concluded that warming of the climate system in recent decades is "unequivocal". This conclusion is not drawn from any one source of data but is based on multiple lines of evidence, including three worldwide temperature datasets showing nearly identical warming trends as well as numerous other independent indicators of global warming (e.g. rising sea levels, shrinking Arctic sea ice)."
56. IPCC SR15 Ch1 2018, p. 81.
57. Forster et al. 2024, p. 2626
58. Samset, B. H.; Fuglestvedt, J. S.; Lund, M. T. (7 July 2020). "Delayed emergence of a global temperature response after emission mitigation". Nature Communications. 11 (1): 3261. Bibcode:2020NatCo..11.3261S. doi:10.1038/s41467-020-17001-1. hdl:11250/2771093. PMC 7341748. PMID 32636367. At the time of writing, that translated into 2035–2045, where the delay was mostly due to the impacts of the around 0.2 °C of natural, interannual variability of global mean surface air temperature
59. Seip, Knut L.; Grøn, ø.; Wang, H. (31 August 2023). "Global lead-lag changes between climate variability series coincide with major phase shifts in the Pacific decadal oscillation". Theoretical and Applied Climatology. 154 (3–4): 1137–1149. Bibcode:2023ThApC.154.1137S. doi:10.1007/s00704-023-04617-8. hdl:11250/3088837. ISSN 0177-798X. S2CID 261438532.
60. Yao, Shuai-Lei; Huang, Gang; Wu, Ren-Guang; Qu, Xia (January 2016). "The global warming hiatus—a natural product of interactions of a secular warming trend and a multi-decadal oscillation". Theoretical and Applied Climatology. 123 (1–2): 349–360. Bibcode:2016ThApC.123..349Y. doi:10.1007/s00704-014-1358-x. ISSN 0177-798X. S2CID 123602825. Retrieved 20 September 2023.
61. Xie, Shang-Ping; Kosaka, Yu (June 2017). "What Caused the Global Surface Warming Hiatus of 1998–2013?". Current Climate Change Reports. 3 (2): 128–140. Bibcode:2017CCCR....3..128X. doi:10.1007/s40641-017-0063-0. ISSN 2198-6061. S2CID 133522627. Retrieved 20 September 2023.
62. "Global temperature exceeds 2 °C above pre-industrial average on 17 November". Copernicus. 21 November 2023. Retrieved 31 January 2024. While exceeding the 2 °C threshold for a number of days does not mean that we have breached the Paris Agreement targets, the more often that we exceed this threshold, the more serious the cumulative effects of these breaches will become.
63. IPCC, 2021: Summary for Policymakers. In: Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change . Cambridge University Press, Cambridge, United Kingdom and New York, New York, US, pp. 3−32, doi:10.1017/9781009157896.001.
64. McGrath, Matt (17 May 2023). "Global warming set to break key 1.5C limit for first time". BBC News. Retrieved 31 January 2024. The researchers stress that temperatures would have to stay at or above 1.5C for 20 years to be able to say the Paris agreement threshold had been passed.
65. Kennedy et al. 2010, p. S26. Figure 2.5.
66. Loeb et al. 2021.
67. "Global Warming". NASA JPL. 3 June 2010. Retrieved 11 September 2020. Satellite measurements show warming in the troposphere but cooling in the stratosphere. This vertical pattern is consistent with global warming due to increasing greenhouse gases but inconsistent with warming from natural causes.
68. Kennedy et al. 2010, pp. S26, S59–S60
69. USGCRP Chapter 1 2017, p. 35
70. IPCC AR6 WG2 2022, pp. 257–260
71. IPCC SRCCL Summary for Policymakers 2019, p. 7
72. Sutton, Dong & Gregory 2007.
73. "Climate Change: Ocean Heat Content". Noaa Climate.gov. NOAA. 2018. Archived from the original on 12 February 2019. Retrieved 20 February 2019.
74. IPCC AR5 WG1 Ch3 2013, p. 257: "Ocean warming dominates the global energy change inventory. Warming of the ocean accounts for about 93% of the increase in the Earth's energy inventory between 1971 and 2010 (high confidence), with warming of the upper (0 to 700 m) ocean accounting for about 64% of the total.
75. von Schuckman, K.; Cheng, L.; Palmer, M. D.; Hansen, J.; et al. (7 September 2020). "Heat stored in the Earth system: where does the energy go?". Earth System Science Data. 12 (3): 2013–2041. Bibcode:2020ESSD...12.2013V. doi:10.5194/essd-12-2013-2020. hdl:20.500.11850/443809.
76. NOAA, 10 July 2011.
77. United States Environmental Protection Agency 2016, p. 5: "Black carbon that is deposited on snow and ice darkens those surfaces and decreases their reflectivity (albedo). This is known as the snow/ice albedo effect. This effect results in the increased absorption of radiation that accelerates melting."
78. "Arctic warming three times faster than the planet, report warns". Phys.org. 20 May 2021. Retrieved 6 October 2022.
79. Rantanen, Mika; Karpechko, Alexey Yu; Lipponen, Antti; Nordling, Kalle; Hyvärinen, Otto; Ruosteenoja, Kimmo; Vihma, Timo; Laaksonen, Ari (11 August 2022). "The Arctic has warmed nearly four times faster than the globe since 1979". Communications Earth & Environment. 3 (1): 168. Bibcode:2022ComEE...3..168R. doi:10.1038/s43247-022-00498-3. hdl:11250/3115996. ISSN 2662-4435. S2CID 251498876.
80. "The Arctic is warming four times faster than the rest of the world". 14 December 2021. Retrieved 6 October 2022.
81. Liu, Wei; Fedorov, Alexey V.; Xie, Shang-Ping; Hu, Shineng (26 June 2020). "Climate impacts of a weakened Atlantic Meridional Overturning Circulation in a warming climate". Science Advances. 6 (26): eaaz4876. Bibcode:2020SciA....6.4876L. doi:10.1126/sciadv.aaz4876. PMC 7319730. PMID 32637596.
82. ^ Pearce, Fred (18 April 2023). "New Research Sparks Concerns That Ocean Circulation Will Collapse". Retrieved 3 February 2024.
83. Lee, Sang-Ki; Lumpkin, Rick; Gomez, Fabian; Yeager, Stephen; Lopez, Hosmay; Takglis, Filippos; Dong, Shenfu; Aguiar, Wilton; Kim, Dongmin; Baringer, Molly (13 March 2023). "Human-induced changes in the global meridional overturning circulation are emerging from the Southern Ocean". Communications Earth & Environment. 4 (1): 69. Bibcode:2023ComEE...4...69L. doi:10.1038/s43247-023-00727-3.
84. "NOAA Scientists Detect a Reshaping of the Meridional Overturning Circulation in the Southern Ocean". NOAA. 29 March 2023.
85. Schuur, Edward A. G.; Abbott, Benjamin W.; Commane, Roisin; Ernakovich, Jessica; Euskirchen, Eugenie; Hugelius, Gustaf; Grosse, Guido; Jones, Miriam; Koven, Charlie; Leshyk, Victor; Lawrence, David; Loranty, Michael M.; Mauritz, Marguerite; Olefeldt, David; Natali, Susan; Rodenhizer, Heidi; Salmon, Verity; Schädel, Christina; Strauss, Jens; Treat, Claire; Turetsky, Merritt (2022). "Permafrost and Climate Change: Carbon Cycle Feedbacks From the Warming Arctic". Annual Review of Environment and Resources. 47: 343–371. Bibcode:2022ARER...47..343S. doi:10.1146/annurev-environ-012220-011847. Medium-range estimates of Arctic carbon emissions could result from moderate climate emission mitigation policies that keep global warming below 3 °C (e.g., RCP4.5). This global warming level most closely matches country emissions reduction pledges made for the Paris Climate Agreement...
86. Phiddian, Ellen (5 April 2022). "Explainer: IPCC Scenarios". Cosmos. Retrieved 30 September 2023. "The IPCC doesn't make projections about which of these scenarios is more likely, but other researchers and modellers can. The Australian Academy of Science, for instance, released a report last year stating that our current emissions trajectory had us headed for a 3 °C warmer world, roughly in line with the middle scenario. Climate Action Tracker predicts 2.5 to 2.9 °C of warming based on current policies and action, with pledges and government agreements taking this to 2.1 °C.
87. WMO 2024b, p. 2.
88. "Climate Change 2021 - The Physical Science Basis" (PDF). Intergovernmental Panel on Climate Change. 7 August 2021. IPCC AR6 WGI. Archived (PDF) from the original on 5 April 2024.
89. IPCC AR6 WG1 Summary for Policymakers 2021, p. SPM-17
90. Meinshausen, Malte; Smith, S. J.; Calvin, K.; Daniel, J. S.; Kainuma, M. L. T.; Lamarque, J-F.; Matsumoto, K.; Montzka, S. A.; Raper, S. C. B.; Riahi, K.; Thomson, A.; Velders, G. J. M.; van Vuuren, D.P. P. (2011). "The RCP greenhouse gas concentrations and their extensions from 1765 to 2300". Climatic Change. 109 (1–2): 213–241. Bibcode:2011ClCh..109..213M. doi:10.1007/s10584-011-0156-z. ISSN 0165-0009.
91. Lyon, Christopher; Saupe, Erin E.; Smith, Christopher J.; Hill, Daniel J.; Beckerman, Andrew P.; Stringer, Lindsay C.; Marchant, Robert; McKay, James; Burke, Ariane; O'Higgins, Paul; Dunhill, Alexander M.; Allen, Bethany J.; Riel-Salvatore, Julien; Aze, Tracy (2021). "Climate change research and action must look beyond 2100". Global Change Biology. 28 (2): 349–361. doi:10.1111/gcb.15871. hdl:20.500.11850/521222. ISSN 1365-2486. PMID 34558764. S2CID 237616583.
92. IPCC AR6 WG1 Technical Summary 2021, pp. 43–44
93. Rogelj et al. 2019
94. United Nations Environment Programme 2024, pp. XI, XVII.
95. Brown, Patrick T.; Li, Wenhong; Xie, Shang-Ping (27 January 2015). "Regions of significant influence on unforced global mean surface air temperature variability in climate models: Origin of global temperature variability". Journal of Geophysical Research: Atmospheres. 120 (2): 480–494. doi:10.1002/2014JD022576. hdl:10161/9564.
96. Trenberth, Kevin E.; Fasullo, John T. (December 2013). "An apparent hiatus in global warming?". Earth's Future. 1 (1): 19–32. Bibcode:2013EaFut...1...19T. doi:10.1002/2013EF000165.
97. National Research Council 2012, p. 9
98. IPCC AR5 WG1 Ch10 2013, p. 916.
99. Knutson 2017, p. 443; IPCC AR5 WG1 Ch10 2013, pp. 875–876
100. ^ USGCRP 2009, p. 20.
101. IPCC AR6 WG1 Summary for Policymakers 2021, p. 7
102. NASA. "The Causes of Climate Change". Climate Change: Vital Signs of the Planet. Archived from the original on 8 May 2019. Retrieved 8 May 2019.
103. Ozone acts as a greenhouse gas in the lowest layer of the atmosphere, the troposphere (as opposed to the stratospheric ozone layer). Wang, Shugart & Lerdau 2017
104. Schmidt et al. 2010; USGCRP Climate Science Supplement 2014, p. 742
105. IPCC AR4 WG1 Ch1 2007, FAQ1.1: "To emit 240 W m, a surface would have to have a temperature of around −19 °C. This is much colder than the conditions that actually exist at the Earth's surface (the global mean surface temperature is about 14 °C).
106. ACS. "What Is the Greenhouse Effect?". Archived from the original on 26 May 2019. Retrieved 26 May 2019.
107. The Guardian, 19 February 2020.
108. WMO 2024a, p. 2.
109. The Cenozoic CO2 Proxy Integration Project (CenCOPIP) Consortium 2023.
110. IPCC AR6 WG1 Technical Summary 2021, p. TS-35.
111. IPCC AR6 WG3 Summary for Policymakers 2022, Figure SPM.1.
112. Olivier & Peters 2019, p. 17
113. Our World in Data, 18 September 2020; EPA 2020: "Greenhouse gas emissions from industry primarily come from burning fossil fuels for energy, as well as greenhouse gas emissions from certain chemical reactions necessary to produce goods from raw materials."
114. "Redox, extraction of iron and transition metals". Hot air (oxygen) reacts with the coke (carbon) to produce carbon dioxide and heat energy to heat up the furnace. Removing impurities: The calcium carbonate in the limestone thermally decomposes to form calcium oxide. calcium carbonate → calcium oxide + carbon dioxide
115. Kvande 2014: "Carbon dioxide gas is formed at the anode, as the carbon anode is consumed upon reaction of carbon with the oxygen ions from the alumina (Al₂O₃). Formation of carbon dioxide is unavoidable as long as carbon anodes are used, and it is of great concern because CO₂ is a greenhouse gas."
116. EPA 2020
117. Global Methane Initiative 2020: "Estimated Global Anthropogenic Methane Emissions by Source, 2020: Enteric fermentation (27%), Manure Management (3%), Coal Mining (9%), Municipal Solid Waste (11%), Oil & Gas (24%), Wastewater (7%), Rice Cultivation (7%)."
118. EPA 2019: "Agricultural activities, such as fertilizer use, are the primary source of N₂O emissions."
119. Davidson 2009: "2.0% of manure nitrogen and 2.5% of fertilizer nitrogen was converted to nitrous oxide between 1860 and 2005; these percentage contributions explain the entire pattern of increasing nitrous oxide concentrations over this period."
120. "Understanding methane emissions". International Energy Agency.
121. ^ Riebeek, Holli (16 June 2011). "The Carbon Cycle". Earth Observatory. NASA. Archived from the original on 5 March 2016. Retrieved 5 April 2018.
122. IPCC SRCCL Summary for Policymakers 2019, p. 10
123. IPCC SROCC Ch5 2019, p. 450.
124. "Indicators of Forest Extent / Forest Loss". World Resources Institute. 4 April 2024. Archived from the original on 27 May 2024. Chart in section titled "Annual rates of global tree cover loss have risen since 2000".
125. Ritchie & Roser 2018
126. The Sustainability Consortium, 13 September 2018; UN FAO 2016, p. 18.
127. IPCC SRCCL Summary for Policymakers 2019, p. 18
128. Curtis et al. 2018
129. ^ Garrett, L.; Lévite, H.; Besacier, C.; Alekseeva, N.; Duchelle, M. (2022). The key role of forest and landscape restoration in climate action. Rome: FAO. doi:10.4060/cc2510en. ISBN 978-92-5-137044-5.
130. ^ World Resources Institute, 8 December 2019
131. IPCC SRCCL Ch2 2019, p. 172: "The global biophysical cooling alone has been estimated by a larger range of climate models and is −0.10 ± 0.14 °C; it ranges from −0.57 °C to +0.06 °C ... This cooling is essentially dominated by increases in surface albedo: historical land cover changes have generally led to a dominant brightening of land."
132. Haywood 2016, p. 456; McNeill 2017; Samset et al. 2018.
133. IPCC AR5 WG1 Ch2 2013, p. 183.
134. He et al. 2018; Storelvmo et al. 2016
135. "Aerosol pollution has caused decades of global dimming". American Geophysical Union. 18 February 2021. Archived from the original on 27 March 2023. Retrieved 18 December 2023.
136. Monroe, Robert (20 January 2023). "Increased Atmospheric Dust has Masked Power of Greenhouse Gases to Warm Planet | Scripps Institution of Oceanography". scripps.ucsd.edu. Retrieved 8 November 2024.
137. Wild et al. 2005; Storelvmo et al. 2016; Samset et al. 2018.
138. Twomey 1977.
139. Albrecht 1989.
140. ^ USGCRP Chapter 2 2017, p. 78.
141. Ramanathan & Carmichael 2008; RIVM 2016.
142. Sand et al. 2015
143. "IMO 2020 – cutting sulphur oxide emissions". imo.org.
144. Carbon Brief, 3 July 2023
145. "Climate Science Special Report: Fourth National Climate Assessment, Volume I - Chapter 3: Detection and Attribution of Climate Change". science2017.globalchange.gov. U.S. Global Change Research Program (USGCRP): 1–470. 2017. Archived from the original on 23 September 2019. Adapted directly from Fig. 3.3.
146. Wuebbles, D. J.; Fahey, D. W.; Hibbard, K. A.; Deangelo, B.; Doherty, S.; Hayhoe, K.; Horton, R.; Kossin, J. P.; Taylor, P. C.; Waple, A. M.; Yohe, C. P. (23 November 2018). "Climate Science Special Report / Fourth National Climate Assessment (NCA4), Volume I /Executive Summary / Highlights of the Findings of the U.S. Global Change Research Program Climate Science Special Report". globalchange.gov. U.S. Global Change Research Program: 1–470. doi:10.7930/J0DJ5CTG. Archived from the original on 14 June 2019.
147. National Academies 2008, p. 6
148. "Is the Sun causing global warming?". Climate Change: Vital Signs of the Planet. Archived from the original on 5 May 2019. Retrieved 10 May 2019.
149. IPCC AR4 WG1 Ch9 2007, pp. 702–703; Randel et al. 2009.
150. Greicius, Tony (2 August 2022). "Tonga eruption blasted unprecedented amount of water into stratosphere". NASA Global Climate Change. Retrieved 18 January 2024. Massive volcanic eruptions like Krakatoa and Mount Pinatubo typically cool Earth's surface by ejecting gases, dust, and ash that reflect sunlight back into space. In contrast, the Tonga volcano didn't inject large amounts of aerosols into the stratosphere, and the huge amounts of water vapor from the eruption may have a small, temporary warming effect, since water vapor traps heat. The effect would dissipate when the extra water vapor cycles out of the stratosphere and would not be enough to noticeably exacerbate climate change effects.
151. ^ USGCRP Chapter 2 2017, p. 79
152. Fischer & Aiuppa 2020.
153. "Thermodynamics: Albedo". NSIDC. Archived from the original on 11 October 2017. Retrieved 10 October 2017.
154. "The study of Earth as an integrated system". Vitals Signs of the Planet. Earth Science Communications Team at NASA's Jet Propulsion Laboratory / California Institute of Technology. 2013. Archived from the original on 26 February 2019.
155. ^ USGCRP Chapter 2 2017, pp. 89–91.
156. IPCC AR6 WG1 Technical Summary 2021, p. 58: "The net effect of changes in clouds in response to global warming is to amplify human-induced warming, that is, the net cloud feedback is positive (high confidence)"
157. USGCRP Chapter 2 2017, pp. 89–90.
158. IPCC AR5 WG1 2013, p. 14
159. IPCC AR6 WG1 Technical Summary 2021, p. 93: "Feedback processes are expected to become more positive overall (more amplifying of global surface temperature changes) on multi-decadal time scales as the spatial pattern of surface warming evolves and global surface temperature increases."
160. Williams, Ceppi & Katavouta 2020.
161. NASA, 28 May 2013.
162. Cohen et al. 2014.
163. ^ Turetsky et al. 2019
164. Climate.gov, 23 June 2022: "Carbon cycle experts estimate that natural "sinks"—processes that remove carbon from the atmosphere—on land and in the ocean absorbed the equivalent of about half of the carbon dioxide we emitted each year in the 2011–2020 decade."
165. IPCC AR6 WG1 Technical Summary 2021, p. TS-122, Box TS.5, Figure 1
166. Melillo et al. 2017: Our first-order estimate of a warming-induced loss of 190 Pg of soil carbon over the 21st century is equivalent to the past two decades of carbon emissions from fossil fuel burning.
167. IPCC SRCCL Ch2 2019, pp. 133, 144.
168. USGCRP Chapter 2 2017, pp. 93–95.
169. Liu, Y.; Moore, J. K.; Primeau, F.; Wang, W. L. (22 December 2022). "Reduced CO2 uptake and growing nutrient sequestration from slowing overturning circulation". Nature Climate Change. 13: 83–90. doi:10.1038/s41558-022-01555-7. OSTI 2242376. S2CID 255028552.
170. IPCC AR6 WG1 Technical Summary 2021, pp. 58, 59: "Clouds remain the largest contribution to overall uncertainty in climate feedbacks."
171. Wolff et al. 2015: "the nature and magnitude of these feedbacks are the principal cause of uncertainty in the response of Earth's climate (over multi-decadal and longer periods) to a particular emissions scenario or greenhouse gas concentration pathway."
172. IPCC AR5 SYR Glossary 2014, p. 120.
173. Carbon Brief, 15 January 2018, "What are the different types of climate models?"
174. Wolff et al. 2015
175. Carbon Brief, 15 January 2018, "Who does climate modelling around the world?"
176. Carbon Brief, 15 January 2018, "What is a climate model?"
177. IPCC AR4 WG1 Ch8 2007, FAQ 8.1.
178. Stroeve et al. 2007; National Geographic, 13 August 2019
179. Liepert & Previdi 2009.
180. Rahmstorf et al. 2007; Mitchum et al. 2018
181. USGCRP Chapter 15 2017.
182. Hébert, R.; Herzschuh, U.; Laepple, T. (31 October 2022). "Millennial-scale climate variability over land overprinted by ocean temperature fluctuations". Nature Geoscience. 15 (1): 899–905. Bibcode:2022NatGe..15..899H. doi:10.1038/s41561-022-01056-4. PMC 7614181. PMID 36817575.
183. Carbon Brief, 15 January 2018, "What are the inputs and outputs for a climate model?"
184. Matthews et al. 2009
185. Carbon Brief, 19 April 2018; Meinshausen 2019, p. 462.
186. Hansen et al. 2016; Smithsonian, 26 June 2016.
187. USGCRP Chapter 15 2017, p. 415.
188. Scientific American, 29 April 2014; Burke & Stott 2017.
189. Liu, Fei; Wang, Bin; Ouyang, Yu; Wang, Hui; Qiao, Shaobo; Chen, Guosen; Dong, Wenjie (19 April 2022). "Intraseasonal variability of global land monsoon precipitation and its recent trend". npj Climate and Atmospheric Science. 5 (1): 30. Bibcode:2022npCAS...5...30L. doi:10.1038/s41612-022-00253-7. ISSN 2397-3722.
190. USGCRP Chapter 9 2017, p. 260.
191. Studholme, Joshua; Fedorov, Alexey V.; Gulev, Sergey K.; Emanuel, Kerry; Hodges, Kevin (29 December 2021). "Poleward expansion of tropical cyclone latitudes in warming climates". Nature Geoscience. 15: 14–28. doi:10.1038/s41561-021-00859-1. S2CID 245540084.
192. "Hurricanes and Climate Change". Center for Climate and Energy Solutions. 10 July 2020.
193. NOAA 2017.
194. WMO 2024a, p. 6.
195. IPCC AR6 WG2 2022, p. 1302
196. DeConto & Pollard 2016
197. Bamber et al. 2019.
198. Zhang et al. 2008
199. IPCC SROCC Summary for Policymakers 2019, p. 18
200. Doney et al. 2009.
201. Deutsch et al. 2011
202. IPCC SROCC Ch5 2019, p. 510; "Climate Change and Harmful Algal Blooms". EPA. 5 September 2013. Retrieved 11 September 2020.
203. "Tipping Elements – big risks in the Earth System". Potsdam Institute for Climate Impact Research. Retrieved 31 January 2024.
204. ^ Armstrong McKay, David I.; Staal, Arie; Abrams, Jesse F.; Winkelmann, Ricarda; Sakschewski, Boris; Loriani, Sina; Fetzer, Ingo; Cornell, Sarah E.; Rockström, Johan; Lenton, Timothy M. (9 September 2022). "Exceeding 1.5 °C global warming could trigger multiple climate tipping points". Science. 377 (6611): eabn7950. doi:10.1126/science.abn7950. hdl:10871/131584. ISSN 0036-8075. PMID 36074831. S2CID 252161375.
205. IPCC SR15 Ch3 2018, p. 283.
206. Carbon Brief, 10 February 2020
207. Bochow, Nils; Poltronieri, Anna; Robinson, Alexander; Montoya, Marisa; Rypdal, Martin; Boers, Niklas (18 October 2023). "Overshooting the critical threshold for the Greenland ice sheet". Nature. 622 (7983): 528–536. Bibcode:2023Natur.622..528B. doi:10.1038/s41586-023-06503-9. PMC 10584691. PMID 37853149.
208. IPCC AR6 WG1 Summary for Policymakers 2021, p. 21
209. IPCC AR5 WG1 Ch12 2013, pp. 88–89, FAQ 12.3
210. Smith et al. 2009; Levermann et al. 2013
211. IPCC AR5 WG1 Ch12 2013, p. 1112.
212. Oschlies, Andreas (16 April 2021). "A committed fourfold increase in ocean oxygen loss". Nature Communications. 12 (1): 2307. Bibcode:2021NatCo..12.2307O. doi:10.1038/s41467-021-22584-4. PMC 8052459. PMID 33863893.
213. Lau, Sally C. Y.; Wilson, Nerida G.; Golledge, Nicholas R.; Naish, Tim R.; Watts, Phillip C.; Silva, Catarina N. S.; Cooke, Ira R.; Allcock, A. Louise; Mark, Felix C.; Linse, Katrin (21 December 2023). "Genomic evidence for West Antarctic Ice Sheet collapse during the Last Interglacial" (PDF). Science. 382 (6677): 1384–1389. Bibcode:2023Sci...382.1384L. doi:10.1126/science.ade0664. PMID 38127761. S2CID 266436146.
214. Naughten, Kaitlin A.; Holland, Paul R.; De Rydt, Jan (23 October 2023). "Unavoidable future increase in West Antarctic ice-shelf melting over the twenty-first century". Nature Climate Change. 13 (11): 1222–1228. Bibcode:2023NatCC..13.1222N. doi:10.1038/s41558-023-01818-x. S2CID 264476246.
215. IPCC SR15 Ch3 2018, p. 218.
216. Martins, Paulo Mateus; Anderson, Marti J.; Sweatman, Winston L.; Punnett, Andrew J. (9 April 2024). "Significant shifts in latitudinal optima of North American birds". Proceedings of the National Academy of Sciences of the United States of America. 121 (15): e2307525121. Bibcode:2024PNAS..12107525M. doi:10.1073/pnas.2307525121. ISSN 0027-8424. PMC 11009622. PMID 38557189.
217. IPCC SRCCL Ch2 2019, p. 133.
218. Deng, Yuanhong; Li, Xiaoyan; Shi, Fangzhong; Hu, Xia (December 2021). "Woody plant encroachment enhanced global vegetation greening and ecosystem water-use efficiency". Global Ecology and Biogeography. 30 (12): 2337–2353. Bibcode:2021GloEB..30.2337D. doi:10.1111/geb.13386. ISSN 1466-822X. Retrieved 10 June 2024 – via Wiley Online Library.
219. IPCC SRCCL Summary for Policymakers 2019, p. 7; Zeng & Yoon 2009.
220. Turner et al. 2020, p. 1.
221. Urban 2015.
222. Poloczanska et al. 2013; Lenoir et al. 2020
223. Smale et al. 2019
224. IPCC SROCC Summary for Policymakers 2019, p. 13.
225. IPCC SROCC Ch5 2019, p. 510
226. IPCC SROCC Ch5 2019, p. 451.
227. Azevedo-Schmidt, Lauren; Meineke, Emily K.; Currano, Ellen D. (18 October 2022). "Insect herbivory within modern forests is greater than fossil localities". Proceedings of the National Academy of Sciences of the United States of America. 119 (42): e2202852119. Bibcode:2022PNAS..11902852A. doi:10.1073/pnas.2202852119. ISSN 0027-8424. PMC 9586316. PMID 36215482.
228. "Coral Reef Risk Outlook". National Oceanic and Atmospheric Administration. 2 January 2012. Retrieved 4 April 2020. At present, local human activities, coupled with past thermal stress, threaten an estimated 75 percent of the world's reefs. By 2030, estimates predict more than 90% of the world's reefs will be threatened by local human activities, warming, and acidification, with nearly 60% facing high, very high, or critical threat levels.
229. Carbon Brief, 7 January 2020.
230. IPCC AR5 WG2 Ch28 2014, p. 1596: "Within 50 to 70 years, loss of hunting habitats may lead to elimination of polar bears from seasonally ice-covered areas, where two-thirds of their world population currently live."
231. "What a changing climate means for Rocky Mountain National Park". National Park Service. Retrieved 9 April 2020.
232. IPCC AR6 WG1 Summary for Policymakers 2021, p. SPM-23, Fig. SPM.6
233. Lenton, Timothy M.; Xu, Chi; Abrams, Jesse F.; Ghadiali, Ashish; Loriani, Sina; Sakschewski, Boris; Zimm, Caroline; Ebi, Kristie L.; Dunn, Robert R.; Svenning, Jens-Christian; Scheffer, Marten (2023). "Quantifying the human cost of global warming". Nature Sustainability. 6 (10): 1237–1247. Bibcode:2023NatSu...6.1237L. doi:10.1038/s41893-023-01132-6. hdl:10871/132650.
234. IPCC AR5 WG2 Ch18 2014, pp. 983, 1008
235. IPCC AR5 WG2 Ch19 2014, p. 1077.
236. IPCC AR5 SYR Summary for Policymakers 2014, p. 8, SPM 2
237. IPCC AR5 SYR Summary for Policymakers 2014, p. 13, SPM 2.3
238. ^ Romanello 2023
239. ^ Ebi et al. 2018
240. ^ Romanello 2022
241. ^ IPCC AR6 WG2 SPM 2022, p. 9
242. World Economic Forum 2024, p. 4
243. ^ Carbon Brief, 19 June 2017
244. Mora et al. 2017
245. IPCC AR6 WG2 Ch6 2022, p. 988
246. World Economic Forum 2024, p. 24
247. IPCC AR6 WG2 Ch5 2022, p. 748
248. IPCC AR6 WG2 Technical Summary 2022, p. 63
249. DeFries et al. 2019, p. 3; Krogstrup & Oman 2019, p. 10.
250. ^ Women's leadership and gender equality in climate action and disaster risk reduction in Africa − A call for action. Accra: FAO & The African Risk Capacity (ARC) Group. 2021. doi:10.4060/cb7431en. ISBN 978-92-5-135234-2. S2CID 243488592.
251. IPCC AR5 WG2 Ch13 2014, pp. 796–797
252. IPCC AR6 WG2 2022, p. 725
253. Hallegatte et al. 2016, p. 12.
254. IPCC AR5 WG2 Ch13 2014, p. 796.
255. Grabe, Grose and Dutt, 2014; FAO, 2011; FAO, 2021a; Fisher and Carr, 2015; IPCC, 2014; Resurrección et al., 2019; UNDRR, 2019; Yeboah et al., 2019.
256. "Climate Change | United Nations For Indigenous Peoples". United Nations Department of Economic and Social Affairs. Retrieved 29 April 2022.
257. Mach et al. 2019.
258. ^ The status of women in agrifood systems - Overview. Rome: FAO. 2023. doi:10.4060/cc5060en. S2CID 258145984.
259. IPCC SROCC Ch4 2019, p. 328.
260. UNHCR 2011, p. 3.
261. Matthews 2018, p. 399.
262. Balsari, Dresser & Leaning 2020
263. Cattaneo et al. 2019; IPCC AR6 WG2 2022, pp. 15, 53
264. Flavell 2014, p. 38; Kaczan & Orgill-Meyer 2020
265. Serdeczny et al. 2016.
266. IPCC SRCCL Ch5 2019, pp. 439, 464.
267. National Oceanic and Atmospheric Administration. "What is nuisance flooding?". Retrieved 8 April 2020.
268. Kabir et al. 2016.
269. Van Oldenborgh et al. 2019.
270. IPCC AR5 SYR Glossary 2014, p. 125.
271. IPCC SR15 Summary for Policymakers 2018, p. 12
272. IPCC SR15 Summary for Policymakers 2018, p. 15
273. United Nations Environment Programme 2019, p. XX
274. United Nations Environment Programme 2024, pp. 33, 34.
275. IPCC AR6 WG3 Ch3 2022, p. 300: "The global benefits of pathways limiting warming to 2 °C (>67%) outweigh global mitigation costs over the 21st century, if aggregated economic impacts of climate change are at the moderate to high end of the assessed range, and a weight consistent with economic theory is given to economic impacts over the long term. This holds true even without accounting for benefits in other sustainable development dimensions or nonmarket damages from climate change (medium confidence)."
276. IPCC SR15 Ch2 2018, p. 109.
277. Teske, ed. 2019, p. xxiii.
278. World Resources Institute, 8 August 2019
279. IPCC SR15 Ch3 2018, p. 266: "Where reforestation is the restoration of natural ecosystems, it benefits both carbon sequestration and conservation of biodiversity and ecosystem services."
280. Bui et al. 2018, p. 1068; IPCC SR15 Summary for Policymakers 2018, p. 17
281. IPCC SR15 2018, p. 34; IPCC SR15 Summary for Policymakers 2018, p. 17
282. IPCC SR15 Ch4 2018, pp. 347–352
283. Friedlingstein et al. 2019
284. ^ United Nations Environment Programme 2019, p. 46; Vox, 20 September 2019; Sepulveda, Nestor A.; Jenkins, Jesse D.; De Sisternes, Fernando J.; Lester, Richard K. (2018). "The Role of Firm Low-Carbon Electricity Resources in Deep Decarbonization of Power Generation". Joule. 2 (11): 2403–2420. Bibcode:2018Joule...2.2403S. doi:10.1016/j.joule.2018.08.006.
285. IEA World Energy Outlook 2023, pp. 18
286. REN21 2020, p. 32, Fig.1.
287. IEA World Energy Outlook 2023, pp. 18, 26
288. "Record Growth in Renewables, but Progress Needs to be Equitable". IRENA. 27 March 2024.
289. IEA 2021, p. 57, Fig 2.5; Teske et al. 2019, p. 180, Table 8.1
290. Our World in Data-Why did renewables become so cheap so fast?; IEA – Projected Costs of Generating Electricity 2020
291. "IPCC Working Group III report: Mitigation of Climate Change". Intergovernmental Panel on Climate Change. 4 April 2022. Retrieved 19 January 2024.
292. IPCC SR15 Ch2 2018, p. 131, Figure 2.15
293. Teske 2019, pp. 409–410.
294. United Nations Environment Programme 2019, p. XXIII, Table ES.3; Teske, ed. 2019, p. xxvii, Fig.5.
295. ^ IPCC SR15 Ch2 2018, pp. 142–144; United Nations Environment Programme 2019, Table ES.3 & p. 49
296. "Transport emissions". Climate action. European Commission. 2016. Archived from the original on 10 October 2021. Retrieved 2 January 2022.
297. IPCC AR5 WG3 Ch9 2014, p. 697; NREL 2017, pp. vi, 12
298. Berrill et al. 2016.
299. IPCC SR15 Ch4 2018, pp. 324–325.
300. Gill, Matthew; Livens, Francis; Peakman, Aiden. "Nuclear Fission". In Letcher (2020), pp. 147–149.
301. Horvath, Akos; Rachlew, Elisabeth (January 2016). "Nuclear power in the 21st century: Challenges and possibilities". Ambio. 45 (Suppl 1): S38–49. Bibcode:2016Ambio..45S..38H. doi:10.1007/s13280-015-0732-y. ISSN 1654-7209. PMC 4678124. PMID 26667059.
302. "Hydropower". iea.org. International Energy Agency. Retrieved 12 October 2020. Hydropower generation is estimated to have increased by over 2% in 2019 owing to continued recovery from drought in Latin America as well as strong capacity expansion and good water availability in China (...) capacity expansion has been losing speed. This downward trend is expected to continue, due mainly to less large-project development in China and Brazil, where concerns over social and environmental impacts have restricted projects.
303. Watts et al. 2019, p. 1854; WHO 2018, p. 27
304. Watts et al. 2019, p. 1837; WHO 2016
305. WHO 2018, p. 27; Vandyck et al. 2018; IPCC SR15 2018, p. 97: "Limiting warming to 1.5 °C can be achieved synergistically with poverty alleviation and improved energy security and can provide large public health benefits through improved air quality, preventing millions of premature deaths. However, specific mitigation measures, such as bioenergy, may result in trade-offs that require consideration."
306. IPCC AR6 WG3 2022, p. 300
307. IPCC SR15 Ch2 2018, p. 97
308. IPCC AR5 SYR Summary for Policymakers 2014, p. 29; IEA 2020b
309. IPCC SR15 Ch2 2018, p. 155, Fig. 2.27
310. IEA 2020b
311. IPCC SR15 Ch2 2018, p. 142
312. IPCC SR15 Ch2 2018, pp. 138–140
313. IPCC SR15 Ch2 2018, pp. 141–142
314. IPCC AR5 WG3 Ch9 2014, pp. 686–694.
315. World Resources Institute, December 2019, p. 1
316. World Resources Institute, December 2019, pp. 1, 3
317. IPCC SRCCL 2019, p. 22, B.6.2
318. IPCC SRCCL Ch5 2019, pp. 487, 488, FIGURE 5.12 Humans on a vegan exclusive diet would save about 7.9 GtCO₂ equivalent per year by 2050 IPCC AR6 WG1 Technical Summary 2021, p. 51 Agriculture, Forestry and Other Land Use used an average of 12 GtCO₂ per year between 2007 and 2016 (23% of total anthropogenic emissions).
319. IPCC SRCCL Ch5 2019, pp. 82, 162, FIGURE 1.1
320. "Low and zero emissions in the steel and cement industries" (PDF). pp. 11, 19–22.
321. ^ Lebling, Katie; Gangotra, Ankita; Hausker, Karl; Byrum, Zachary (13 November 2023). "7 Things to Know About Carbon Capture, Utilization and Sequestration". World Resources Institute. Text was copied from this source, which is available under a Creative Commons Attribution 4.0 International License
322. IPCC AR6 WG3 Summary for Policymakers 2022, p. 38
323. World Resources Institute, 8 August 2019: IPCC SRCCL Ch2 2019, pp. 189–193.
324. Kreidenweis et al. 2016
325. National Academies of Sciences, Engineering, and Medicine 2019, pp. 95–102
326. National Academies of Sciences, Engineering, and Medicine 2019, pp. 45–54
327. Nelson, J. D. J.; Schoenau, J. J.; Malhi, S. S. (1 October 2008). "Soil organic carbon changes and distribution in cultivated and restored grassland soils in Saskatchewan". Nutrient Cycling in Agroecosystems. 82 (2): 137–148. Bibcode:2008NCyAg..82..137N. doi:10.1007/s10705-008-9175-1. ISSN 1573-0867. S2CID 24021984.
328. Ruseva et al. 2020
329. IPCC AR5 SYR 2014, p. 125; Bednar, Obersteiner & Wagner 2019.
330. IPCC SR15 2018, p. 34
331. IPCC, 2022: Summary for Policymakers . In: Climate Change 2022: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change . Cambridge University Press, Cambridge and New York, pp. 3–33, doi:10.1017/9781009325844.001.
332. IPCC AR5 SYR 2014, p. 17.
333. IPCC SR15 Ch4 2018, pp. 396–397.
334. IPCC AR4 WG2 Ch19 2007, p. 796.
335. UNEP 2018, pp. xii–xiii.
336. Stephens, Scott A.; Bell, Robert G.; Lawrence, Judy (2018). "Developing signals to trigger adaptation to sea-level rise". Environmental Research Letters. 13 (10). 104004. Bibcode:2018ERL....13j4004S. doi:10.1088/1748-9326/aadf96. ISSN 1748-9326.
337. Matthews 2018, p. 402.
338. IPCC SRCCL Ch5 2019, p. 439.
339. Surminski, Swenja; Bouwer, Laurens M.; Linnerooth-Bayer, Joanne (2016). "How insurance can support climate resilience". Nature Climate Change. 6 (4): 333–334. Bibcode:2016NatCC...6..333S. doi:10.1038/nclimate2979. ISSN 1758-6798.
340. IPCC SR15 Ch4 2018, pp. 336–337.
341. "Mangroves against the storm". Shorthand. Retrieved 20 January 2023.
342. "How marsh grass could help protect us from climate change". World Economic Forum. 24 October 2021. Retrieved 20 January 2023.
343. Morecroft, Michael D.; Duffield, Simon; Harley, Mike; Pearce-Higgins, James W.; et al. (2019). "Measuring the success of climate change adaptation and mitigation in terrestrial ecosystems". Science. 366 (6471): eaaw9256. doi:10.1126/science.aaw9256. ISSN 0036-8075. PMID 31831643. S2CID 209339286.
344. Berry, Pam M.; Brown, Sally; Chen, Minpeng; Kontogianni, Areti; et al. (2015). "Cross-sectoral interactions of adaptation and mitigation measures". Climate Change. 128 (3): 381–393. Bibcode:2015ClCh..128..381B. doi:10.1007/s10584-014-1214-0. hdl:10.1007/s10584-014-1214-0. ISSN 1573-1480. S2CID 153904466.
345. IPCC AR5 SYR 2014, p. 54.
346. Sharifi, Ayyoob (2020). "Trade-offs and conflicts between urban climate change mitigation and adaptation measures: A literature review". Journal of Cleaner Production. 276: 122813. Bibcode:2020JCPro.27622813S. doi:10.1016/j.jclepro.2020.122813. ISSN 0959-6526. S2CID 225638176.
347. IPCC AR5 SYR Summary for Policymakers 2014, p. 17, Section 3
348. IPCC SR15 Ch5 2018, p. 447; United Nations (2017) Resolution adopted by the General Assembly on 6 July 2017, Work of the Statistical Commission pertaining to the 2030 Agenda for Sustainable Development (A/RES/71/313)
349. IPCC SR15 Ch5 2018, p. 477.
350. Rauner et al. 2020
351. Mercure et al. 2018
352. World Bank, June 2019, p. 12, Box 1
353. Union of Concerned Scientists, 8 January 2017; Hagmann, Ho & Loewenstein 2019.
354. Watts et al. 2019, p. 1866
355. UN Human Development Report 2020, p. 10
356. International Institute for Sustainable Development 2019, p. iv
357. ICCT 2019, p. iv; Natural Resources Defense Council, 29 September 2017
358. National Conference of State Legislators, 17 April 2020; European Parliament, February 2020
359. Carbon Brief, 16 October 2021
360. Khalfan, Ashfaq; Lewis, Astrid Nilsson; Aguilar, Carlos; Persson, Jacqueline; Lawson, Max; Dab, Nafkote; Jayoussi, Safa; Acharya, Sunil (November 2023). "Climate Equality: A planet for the 99%" (PDF). Oxfam Digital Repository. Oxfam GB. doi:10.21201/2023.000001. Retrieved 18 December 2023.
361. Grasso, Marco; Heede, Richard (19 May 2023). "Time to pay the piper: Fossil fuel companies' reparations for climate damages". One Earth. 6 (5): 459–463. Bibcode:2023OEart...6..459G. doi:10.1016/j.oneear.2023.04.012. hdl:10281/416137. S2CID 258809532.
362. Carbon Brief, 4 Jan 2017.
363. ^ Friedlingstein et al. 2019, Table 7.
364. UNFCCC, "What is the United Nations Framework Convention on Climate Change?"
365. UNFCCC 1992, Article 2.
366. IPCC AR4 WG3 Ch1 2007, p. 97.
367. EPA 2019.
368. UNFCCC, "What are United Nations Climate Change Conferences?"
369. Kyoto Protocol 1997; Liverman 2009, p. 290.
370. Dessai 2001, p. 4; Grubb 2003.
371. Liverman 2009, p. 290.
372. Müller 2010; The New York Times, 25 May 2015; UNFCCC: Copenhagen 2009; EUobserver, 20 December 2009.
373. UNFCCC: Copenhagen 2009.
374. Conference of the Parties to the Framework Convention on Climate Change. Copenhagen. 7–18 December 2009. un document= FCCC/CP/2009/L.7. Archived from the original on 18 October 2010. Retrieved 24 October 2010.
375. Bennett, Paige (2 May 2023). "High-Income Nations Are on Track Now to Meet $100 Billion Climate Pledges, but They're Late". Ecowatch. Retrieved 10 May 2023.
376. Paris Agreement 2015.
377. Climate Focus 2015, p. 3; Carbon Brief, 8 October 2018.
378. Climate Focus 2015, p. 5.
379. "Status of Treaties, United Nations Framework Convention on Climate Change". United Nations Treaty Collection. Retrieved 13 October 2021.; Salon, 25 September 2019.
380. Velders et al. 2007; Young et al. 2021
381. WMO SAOD Executive Summary 2022, pp. 20, 31
382. WMO SAOD Executive Summary 2022, pp. 20, 35; Young et al. 2021
383. Goyal et al. 2019; Velders et al. 2007
384. Carbon Brief, 21 November 2017
385. WMO SAOD Executive Summary 2022, p. 15; Velders et al. 2022
386. "Annual CO₂ emissions by world region" (chart). ourworldindata.org. Our World in Data. Retrieved 18 September 2024.
387. BBC, 1 May 2019; Vice, 2 May 2019.
388. The Verge, 27 December 2019.
389. The Guardian, 28 November 2019
390. Politico, 11 December 2019.
391. "European Green Deal: Commission proposes transformation of EU economy and society to meet climate ambitions". European Commission. 14 July 2021.
392. The Guardian, 28 October 2020
393. "India". Climate Action Tracker. 15 September 2021. Retrieved 3 October 2021.
394. Do, Thang Nam; Burke, Paul J. (2023). "Phasing out coal power in a developing country context: Insights from Vietnam". Energy Policy. 176 (May 2023 113512): 113512. Bibcode:2023EnPol.17613512D. doi:10.1016/j.enpol.2023.113512. hdl:1885/286612. S2CID 257356936.
395. UN NDC Synthesis Report 2021, pp. 4–5; UNFCCC Press Office (26 February 2021). "Greater Climate Ambition Urged as Initial NDC Synthesis Report Is Published". Retrieved 21 April 2021.
396. Stover 2014.
397. Dunlap & McCright 2011, pp. 144, 155; Björnberg et al. 2017
398. Oreskes & Conway 2010; Björnberg et al. 2017
399. O'Neill & Boykoff 2010; Björnberg et al. 2017
400. ^ Björnberg et al. 2017
401. Dunlap & McCright 2015, p. 308.
402. Dunlap & McCright 2011, p. 146.
403. Harvey et al. 2018
404. "Public perceptions on climate change" (PDF). PERITIA Trust EU – The Policy Institute of King's College London. June 2022. p. 4. Archived (PDF) from the original on 15 July 2022.
405. Powell, James (20 November 2019). "Scientists Reach 100% Consensus on Anthropogenic Global Warming". Bulletin of Science, Technology & Society. 37 (4): 183–184. doi:10.1177/0270467619886266. S2CID 213454806.
406. Myers, Krista F.; Doran, Peter T.; Cook, John; Kotcher, John E.; Myers, Teresa A. (20 October 2021). "Consensus revisited: quantifying scientific agreement on climate change and climate expertise among Earth scientists 10 years later". Environmental Research Letters. 16 (10): 104030. Bibcode:2021ERL....16j4030M. doi:10.1088/1748-9326/ac2774. S2CID 239047650.
407. ^ Weart "The Public and Climate Change (since 1980)"
408. Newell 2006, p. 80; Yale Climate Connections, 2 November 2010
409. Pew 2015, p. 10.
410. Preston, Caroline; Hechinger (1 October 2023). "In Some Textbooks, Climate Change Content Is Few and Far Between". undark.org/.
411. Pew 2020.
412. Pew 2015, p. 15.
413. Yale 2021, p. 7.
414. Pew 2020; UNDP 2024, pp. 22–26
415. Yale 2021, p. 9; UNDP 2021, p. 15.
416. Smith & Leiserowitz 2013, p. 943.
417. Gunningham 2018.
418. The Guardian, 19 March 2019; Boulianne, Lalancette & Ilkiw 2020.
419. Deutsche Welle, 22 June 2019.
420. Connolly, Kate (29 April 2021). "'Historic' German ruling says climate goals not tough enough". The Guardian. Retrieved 1 May 2021.
421. Setzer & Byrnes 2019.
422. "Coal Consumption Affecting Climate". Rodney and Otamatea Times, Waitemata and Kaipara Gazette. Warkworth, New Zealand. 14 August 1912. p. 7. Text was earlier published in Popular Mechanics, March 1912, p. 341.
423. Nord, D. C. (2020). Nordic Perspectives on the Responsible Development of the Arctic: Pathways to Action. Springer Polar Sciences. Springer International Publishing. p. 51. ISBN 978-3-030-52324-4. Retrieved 11 March 2023.
424. Mukherjee, A.; Scanlon, B. R.; Aureli, A.; Langan, S.; Guo, H.; McKenzie, A. A. (2020). Global Groundwater: Source, Scarcity, Sustainability, Security, and Solutions. Elsevier Science. p. 331. ISBN 978-0-12-818173-7. Retrieved 11 March 2023.
425. von Humboldt, A.; Wulf, A. (2018). Selected Writings of Alexander von Humboldt: Edited and Introduced by Andrea Wulf. Everyman's Library Classics Series. Knopf Doubleday Publishing Group. p. 10. ISBN 978-1-101-90807-5. Retrieved 11 March 2023.
426. Erdkamp, Paul; Manning, Joseph G.; Verboven, Koenraad (2021). Climate Change and Ancient Societies in Europe and the Near East: Diversity in Collapse and Resilience. Palgrave Studies in Ancient Economies. Springer International Publishing. p. 6. ISBN 978-3-030-81103-7. Retrieved 11 March 2023.
427. Archer & Pierrehumbert 2013, pp. 10–14
428. Foote, Eunice (November 1856). "Circumstances affecting the Heat of the Sun's Rays". The American Journal of Science and Arts. 22: 382–383. Retrieved 31 January 2016 – via Google Books.
429. Huddleston 2019
430. Tyndall 1861.
431. Archer & Pierrehumbert 2013, pp. 39–42; Fleming 2008, Tyndall
432. Lapenis 1998.
433. ^ Weart "The Carbon Dioxide Greenhouse Effect"; Fleming 2008, Arrhenius
434. Callendar 1938; Fleming 2007.
435. Cook, John; Oreskes, Naomi; Doran, Peter T.; Anderegg, William R. L.; et al. (2016). "Consensus on consensus: a synthesis of consensus estimates on human-caused global warming". Environmental Research Letters. 11 (4): 048002. Bibcode:2016ERL....11d8002C. doi:10.1088/1748-9326/11/4/048002. hdl:1983/34949783-dac1-4ce7-ad95-5dc0798930a6.
436. ^ Powell, James (20 November 2019). "Scientists Reach 100% Consensus on Anthropogenic Global Warming". Bulletin of Science, Technology & Society. 37 (4): 183–184. doi:10.1177/0270467619886266. S2CID 213454806. Retrieved 15 November 2020.
437. ^ Lynas, Mark; Houlton, Benjamin Z; Perry, Simon (2021). "Greater than 99% consensus on human caused climate change in the peer-reviewed scientific literature". Environmental Research Letters. 16 (11): 114005. Bibcode:2021ERL....16k4005L. doi:10.1088/1748-9326/ac2966. ISSN 1748-9326. S2CID 239032360.
438. Myers, Krista F.; Doran, Peter T.; Cook, John; Kotcher, John E.; Myers, Teresa A. (20 October 2021). "Consensus revisited: quantifying scientific agreement on climate change and climate expertise among Earth scientists 10 years later". Environmental Research Letters. 16 (10): 104030. Bibcode:2021ERL....16j4030M. doi:10.1088/1748-9326/ac2774. S2CID 239047650.
439. Weart "Suspicions of a Human-Caused Greenhouse (1956–1969)"
440. Weart 2013, p. 3567.
441. Royal Society 2005.
442. National Academies 2008, p. 2; Oreskes 2007, p. 68; Gleick, 7 January 2017
443. Joint statement of the G8+5 Academies (2009); Gleick, 7 January 2017.

Sources

 This article incorporates text from a free content work. Licensed under CC BY-SA 3.0. Text taken from The status of women in agrifood systems – Overview​, FAO, FAO.

IPCC reports

Fourth Assessment Report

• IPCC (2007). Solomon, S.; Qin, D.; Manning, M.; Chen, Z.; et al. (eds.). Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. ISBN 978-0-521-88009-1.
  • Le Treut, H.; Somerville, R.; Cubasch, U.; Ding, Y.; et al. (2007). "Chapter 1: Historical Overview of Climate Change Science" (PDF). IPCC AR4 WG1 2007. pp. 93–127.
  • Randall, D. A.; Wood, R. A.; Bony, S.; Colman, R.; et al. (2007). "Chapter 8: Climate Models and their Evaluation" (PDF). IPCC AR4 WG1 2007. pp. 589–662.
  • Hegerl, G. C.; Zwiers, F. W.; Braconnot, P.; Gillett, N. P.; et al. (2007). "Chapter 9: Understanding and Attributing Climate Change" (PDF). IPCC AR4 WG1 2007. pp. 663–745.

• IPCC (2007). Parry, M. L.; Canziani, O. F.; Palutikof, J. P.; van der Linden, P. J.; et al. (eds.). Climate Change 2007: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. ISBN 978-0-521-88010-7.
  • Schneider, S. H.; Semenov, S.; Patwardhan, A.; Burton, I.; et al. (2007). "Chapter 19: Assessing key vulnerabilities and the risk from climate change" (PDF). IPCC AR4 WG2 2007. pp. 779–810.

• IPCC (2007). Metz, B.; Davidson, O. R.; Bosch, P. R.; Dave, R.; et al. (eds.). Climate Change 2007: Mitigation of Climate Change. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. ISBN 978-0-521-88011-4.
  • Rogner, H.-H.; Zhou, D.; Bradley, R.; Crabbé, P.; et al. (2007). "Chapter 1: Introduction" (PDF). IPCC AR4 WG3 2007. pp. 95–116.

Fifth Assessment report

• IPCC (2013). Stocker, T. F.; Qin, D.; Plattner, G.-K.; Tignor, M.; et al. (eds.). Climate Change 2013: The Physical Science Basis (PDF). Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK & New York: Cambridge University Press. ISBN 978-1-107-05799-9.. AR5 Climate Change 2013: The Physical Science Basis – IPCC
  • IPCC (2013). "Summary for Policymakers" (PDF). IPCC AR5 WG1 2013.
  • Hartmann, D. L.; Klein Tank, A. M. G.; Rusticucci, M.; Alexander, L. V.; et al. (2013). "Chapter 2: Observations: Atmosphere and Surface" (PDF). IPCC AR5 WG1 2013. pp. 159–254.
  • Rhein, M.; Rintoul, S. R.; Aoki, S.; Campos, E.; et al. (2013). "Chapter 3: Observations: Ocean" (PDF). IPCC AR5 WG1 2013. pp. 255–315.
  • Masson-Delmotte, V.; Schulz, M.; Abe-Ouchi, A.; Beer, J.; et al. (2013). "Chapter 5: Information from Paleoclimate Archives" (PDF). IPCC AR5 WG1 2013. pp. 383–464.
  • Bindoff, N. L.; Stott, P. A.; AchutaRao, K. M.; Allen, M. R.; et al. (2013). "Chapter 10: Detection and Attribution of Climate Change: from Global to Regional" (PDF). IPCC AR5 WG1 2013. pp. 867–952.
  • Collins, M.; Knutti, R.; Arblaster, J. M.; Dufresne, J.-L.; et al. (2013). "Chapter 12: Long-term Climate Change: Projections, Commitments and Irreversibility" (PDF). IPCC AR5 WG1 2013. pp. 1029–1136.

• IPCC (2014). Field, C. B.; Barros, V. R.; Dokken, D. J.; Mach, K. J.; et al. (eds.). Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part A: Global and Sectoral Aspects. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. ISBN 978-1-107-05807-1.. Chapters 1–20, SPM, and Technical Summary.
  • Olsson, L.; Opondo, M.; Tschakert, P.; Agrawal, A.; et al. (2014). "Chapter 13: Livelihoods and Poverty" (PDF). IPCC AR5 WG2 A 2014. pp. 793–832.
  • Cramer, W.; Yohe, G. W.; Auffhammer, M.; Huggel, C.; et al. (2014). "Chapter 18: Detection and Attribution of Observed Impacts" (PDF). IPCC AR5 WG2 A 2014. pp. 979–1037.
  • Oppenheimer, M.; Campos, M.; Warren, R.; Birkmann, J.; et al. (2014). "Chapter 19: Emergent Risks and Key Vulnerabilities" (PDF). IPCC AR5 WG2 A 2014. pp. 1039–1099.
• IPCC (2014). Barros, V. R.; Field, C. B.; Dokken, D. J.; Mach, K. J.; et al. (eds.). Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part B: Regional Aspects (PDF). Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK & New York: Cambridge University Press. ISBN 978-1-107-05816-3.. Chapters 21–30, Annexes, and Index.
  • Larsen, J. N.; Anisimov, O. A.; Constable, A.; Hollowed, A. B.; et al. (2014). "Chapter 28: Polar Regions" (PDF). IPCC AR5 WG2 B 2014. pp. 1567–1612.

• IPCC (2014). Edenhofer, O.; Pichs-Madruga, R.; Sokona, Y.; Farahani, E.; et al. (eds.). Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK & New York, NY: Cambridge University Press. ISBN 978-1-107-05821-7.
  • Lucon, O.; Ürge-Vorsatz, D.; Ahmed, A.; Akbari, H.; et al. (2014). "Chapter 9: Buildings" (PDF). IPCC AR5 WG3 2014.
  • Edenhofer, O.; Pichs-Madruga, R.; Sokona, Y.; Farahani, E.; et al. (2014). "Annex III: Technology-specific Cost and Performance Parameters" (PDF). IPCC AR5 WG3 2014. Cambridge, United Kingdom and New York, NY, USA: Cambridge University Press.
• IPCC AR5 SYR (2014). The Core Writing Team; Pachauri, R. K.; Meyer, L. A. (eds.). Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Geneva, Switzerland: IPCC.{{cite book}}: CS1 maint: numeric names: authors list (link)
  • IPCC (2014). "Summary for Policymakers" (PDF). IPCC AR5 SYR 2014.
  • IPCC (2014). "Annex II: Glossary" (PDF). IPCC AR5 SYR 2014.

Special Report: Global Warming of 1.5 °C

• IPCC (2018). Masson-Delmotte, V.; Zhai, P.; Pörtner, H.-O.; Roberts, D.; et al. (eds.). Global Warming of 1.5 °C. An IPCC Special Report on the impacts of global warming of 1.5 °C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty (PDF). Intergovernmental Panel on Climate Change. Global Warming of 1.5 °C –.
  • IPCC (2018). "Summary for Policymakers" (PDF). IPCC SR15 2018. pp. 3–24.
  • Allen, M. R.; Dube, O. P.; Solecki, W.; Aragón-Durand, F.; et al. (2018). "Chapter 1: Framing and Context" (PDF). IPCC SR15 2018. pp. 49–91.
  • Rogelj, J.; Shindell, D.; Jiang, K.; Fifta, S.; et al. (2018). "Chapter 2: Mitigation Pathways Compatible with 1.5 °C in the Context of Sustainable Development" (PDF). IPCC SR15 2018. pp. 93–174.
  • Hoegh-Guldberg, O.; Jacob, D.; Taylor, M.; Bindi, M.; et al. (2018). "Chapter 3: Impacts of 1.5 °C Global Warming on Natural and Human Systems" (PDF). IPCC SR15 2018. pp. 175–311.
  • de Coninck, H.; Revi, A.; Babiker, M.; Bertoldi, P.; et al. (2018). "Chapter 4: Strengthening and Implementing the Global Response" (PDF). IPCC SR15 2018. pp. 313–443.
  • Roy, J.; Tschakert, P.; Waisman, H.; Abdul Halim, S.; et al. (2018). "Chapter 5: Sustainable Development, Poverty Eradication and Reducing Inequalities" (PDF). IPCC SR15 2018. pp. 445–538.

Special Report: Climate change and Land

• IPCC (2019). Shukla, P. R.; Skea, J.; Calvo Buendia, E.; Masson-Delmotte, V.; et al. (eds.). IPCC Special Report on Climate Change, Desertification, Land Degradation, Sustainable Land Management, Food Security, and Greenhouse gas fluxes in Terrestrial Ecosystems (PDF). In press.
  • IPCC (2019). "Summary for Policymakers" (PDF). IPCC SRCCL 2019. pp. 3–34.
  • Jia, G.; Shevliakova, E.; Artaxo, P. E.; De Noblet-Ducoudré, N.; et al. (2019). "Chapter 2: Land-Climate Interactions" (PDF). IPCC SRCCL 2019. pp. 131–247.
  • Mbow, C.; Rosenzweig, C.; Barioni, L. G.; Benton, T.; et al. (2019). "Chapter 5: Food Security" (PDF). IPCC SRCCL 2019. pp. 437–550.

Special Report: The Ocean and Cryosphere in a Changing Climate

• IPCC (2019). Pörtner, H.-O.; Roberts, D. C.; Masson-Delmotte, V.; Zhai, P.; et al. (eds.). IPCC Special Report on the Ocean and Cryosphere in a Changing Climate (PDF). In press.
  • IPCC (2019). "Summary for Policymakers" (PDF). IPCC SROCC 2019. pp. 3–35.
  • Oppenheimer, M.; Glavovic, B.; Hinkel, J.; van de Wal, R.; et al. (2019). "Chapter 4: Sea Level Rise and Implications for Low Lying Islands, Coasts and Communities" (PDF). IPCC SROCC 2019. pp. 321–445.
  • Bindoff, N. L.; Cheung, W. W. L.; Kairo, J. G.; Arístegui, J.; et al. (2019). "Chapter 5: Changing Ocean, Marine Ecosystems, and Dependent Communities" (PDF). IPCC SROCC 2019. pp. 447–587.

Sixth Assessment Report

• IPCC (2021). Masson-Delmotte, V.; Zhai, P.; Pirani, A.; Connors, S. L.; et al. (eds.). Climate Change 2021: The Physical Science Basis (PDF). Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, United Kingdom and New York, NY, US: Cambridge University Press (In Press).
  • IPCC (2021). "Summary for Policymakers" (PDF). IPCC AR6 WG1 2021.
  • Arias, Paola A.; Bellouin, Nicolas; Coppola, Erika; Jones, Richard G.; et al. (2021). "Technical Summary" (PDF). IPCC AR6 WG1 2021.
  • Gulev, Sergey K.; Thorne, Peter W.; Ahn, Jinho; Dentener, Frank J.; et al. (2021). "Chapter 2: Changing state of the climate system" (PDF). Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change.
  • Seneviratne, Sonia I.; Zhang, Xuebin; Adnan, M.; Badi, W.; et al. (2021). "Chapter 11: Weather and climate extreme events in a changing climate" (PDF). IPCC AR6 WG1 2021.
• IPCC (2022). Pörtner, H.-O.; Roberts, D.C.; Tignor, M.; Poloczanska, E.S.; Mintenbeck, K.; Alegría, A.; Craig, M.; Langsdorf, S.; Löschke, S.; Möller, V.; Okem, A.; Rama, B. (eds.). Climate Change 2022: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. doi:10.1017/9781009325844. ISBN 978-1-009-32584-4.
  • IPCC (2022). "Summary for Policymakers" (PDF). IPCC AR6 WG2 2022. pp. 3–33. doi:10.1017/9781009325844.001. ISBN 978-1-009-32584-4.
  • IPCC (2022). "Technical Summary" (PDF). IPCC AR6 WG2 2022. pp. 37–118. doi:10.1017/9781009325844.002. ISBN 978-1-009-32584-4.
  • Bezner Kerr, R.; Hasegawa, T.; Lasco, R.; Bhatt, I.; Deryng, D.; Farrell, A.; Gurney-Smith, H.; Ju, H.; Lluch-Cota, S.; Meza, F.; Nelson, G.; Neufeldt, H.; Thornton, P. (2022). "Food, Fibre and Other Ecosystem Products" (PDF). IPCC AR6 WG2 2022. pp. 713–906. doi:10.1017/9781009325844.007. ISBN 978-1-009-32584-4.
  • Dodman, D.; Hayward, B.; Pelling, M.; Castan Broto, V.; Chow, W.; Chu, E.; Dawson, R.; Khirfan, L.; McPhearson, T.; Prakash, A.; Zheng, Y.; Ziervogel, G. (2022). "Cities, Settlements and Key Infrastructure" (PDF). IPCC AR6 WG2 2022. pp. 907–1040. doi:10.1017/9781009325844.008. ISBN 978-1-009-32584-4.
  • O'Neill, B.; van Aalst, M.; Zaiton Ibrahim, Z.; Berrang Ford, L.; Bhadwal, S.; Buhaug, H.; Diaz, D.; Frieler, K.; Garschagen, M.; Magnan, A.; Midgley, G.; Mirzabaev, A.; Thomas, A.; Warren, R. (2022). "Key Risks across Sectors and Regions" (PDF). IPCC AR6 WG2 2022. pp. 2411–2538. doi:10.1017/9781009325844.025. ISBN 978-1-009-32584-4.
• IPCC (2022). Shukla, P.R.; Skea, J.; et al. (eds.). Climate Change 2022: Mitigation of Climate Change. Contribution of Working Group III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK and New York, NY, USA: Cambridge University Press. doi:10.1017/9781009157926. ISBN 978-1-009-15792-6.
  • IPCC (2022). "Summary for Policymakers" (PDF). IPCC AR6 WG3 2022.
  • Pathak, M.; Slade, R.; Shukla, P.R.; Skea, J.; Pichs-Madruga, R.; Ürge-Vorsatz, D. (2022). "Technical Summary" (PDF). IPCC AR6 WG3 2022. pp. 51–148. doi:10.1017/9781009157926.002. ISBN 978-1-009-15792-6.
  • Riahi, K.; Schaeffer, R.; Arango, J.; Calvin, K.; Guivarch, C.; Hasegawa, T.; Jiang, K.; Kriegler, E.; Matthews, R.; Peters, G.P.; Rao, A.; Robertson, S.; Sebbit, A.M.; Steinberger, J.; Tavoni, M.; van Vuuren, D.P. (2022). "Mitigation Pathways Compatible with Long-term Goals" (PDF). IPCC AR6 WG3 2022. pp. 295–408. doi:10.1017/9781009157926.005. ISBN 978-1-009-15792-6.
• IPCC (2023). Core Writing Team; Lee, H.; Romero, J.; et al. (eds.). Climate Change 2023: Synthesis Report. Contribution of Working Groups I, II and III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (PDF). Geneva, Switzerland: IPCC. doi:10.59327/IPCC/AR6-9789291691647. hdl:1885/299630. ISBN 978-92-9169-164-7. S2CID 260074696.
  • IPCC (2023). "Summary for Policymakers" (PDF). IPCC AR6 SYR 2023.

Other peer-reviewed sources

• Albrecht, Bruce A. (1989). "Aerosols, Cloud Microphysics, and Fractional Cloudiness". Science. 245 (4923): 1227–1239. Bibcode:1989Sci...245.1227A. doi:10.1126/science.245.4923.1227. PMID 17747885. S2CID 46152332.
• Balsari, S.; Dresser, C.; Leaning, J. (2020). "Climate Change, Migration, and Civil Strife". Curr Environ Health Report. 7 (4): 404–414. Bibcode:2020CEHR....7..404B. doi:10.1007/s40572-020-00291-4. PMC 7550406. PMID 33048318.
• Bamber, Jonathan L.; Oppenheimer, Michael; Kopp, Robert E.; Aspinall, Willy P.; Cooke, Roger M. (2019). "Ice sheet contributions to future sea-level rise from structured expert judgment". Proceedings of the National Academy of Sciences. 116 (23): 11195–11200. Bibcode:2019PNAS..11611195B. doi:10.1073/pnas.1817205116. ISSN 0027-8424. PMC 6561295. PMID 31110015.
• Bednar, Johannes; Obersteiner, Michael; Wagner, Fabian (2019). "On the financial viability of negative emissions". Nature Communications. 10 (1): 1783. Bibcode:2019NatCo..10.1783B. doi:10.1038/s41467-019-09782-x. ISSN 2041-1723. PMC 6467865. PMID 30992434.
• Berrill, P.; Arvesen, A.; Scholz, Y.; Gils, H. C.; et al. (2016). "Environmental impacts of high penetration renewable energy scenarios for Europe". Environmental Research Letters. 11 (1): 014012. Bibcode:2016ERL....11a4012B. doi:10.1088/1748-9326/11/1/014012. hdl:11250/2465014.
• Björnberg, Karin Edvardsson; Karlsson, Mikael; Gilek, Michael; Hansson, Sven Ove (2017). "Climate and environmental science denial: A review of the scientific literature published in 1990–2015". Journal of Cleaner Production. 167: 229–241. Bibcode:2017JCPro.167..229B. doi:10.1016/j.jclepro.2017.08.066. ISSN 0959-6526.
• Boulianne, Shelley; Lalancette, Mireille; Ilkiw, David (2020). ""School Strike 4 Climate": Social Media and the International Youth Protest on Climate Change". Media and Communication. 8 (2): 208–218. doi:10.17645/mac.v8i2.2768. ISSN 2183-2439.
• Bui, M.; Adjiman, C.; Bardow, A.; Anthony, Edward J.; et al. (2018). "Carbon capture and storage (CCS): the way forward". Energy & Environmental Science. 11 (5): 1062–1176. doi:10.1039/c7ee02342a. hdl:10044/1/55714.
• Burke, Claire; Stott, Peter (2017). "Impact of Anthropogenic Climate Change on the East Asian Summer Monsoon". Journal of Climate. 30 (14): 5205–5220. arXiv:1704.00563. Bibcode:2017JCli...30.5205B. doi:10.1175/JCLI-D-16-0892.1. ISSN 0894-8755. S2CID 59509210.
• Callendar, G. S. (1938). "The artificial production of carbon dioxide and its influence on temperature". Quarterly Journal of the Royal Meteorological Society. 64 (275): 223–240. Bibcode:1938QJRMS..64..223C. doi:10.1002/qj.49706427503.
• Cattaneo, Cristina; Beine, Michel; Fröhlich, Christiane J.; Kniveton, Dominic; et al. (2019). "Human Migration in the Era of Climate Change". Review of Environmental Economics and Policy. 13 (2): 189–206. doi:10.1093/reep/rez008. hdl:10.1093/reep/rez008. ISSN 1750-6816. S2CID 198660593.
• Cohen, Judah; Screen, James; Furtado, Jason C.; Barlow, Mathew; et al. (2014). "Recent Arctic amplification and extreme mid-latitude weather" (PDF). Nature Geoscience. 7 (9): 627–637. Bibcode:2014NatGe...7..627C. doi:10.1038/ngeo2234. ISSN 1752-0908.
• Curtis, P.; Slay, C.; Harris, N.; Tyukavina, A.; et al. (2018). "Classifying drivers of global forest loss". Science. 361 (6407): 1108–1111. Bibcode:2018Sci...361.1108C. doi:10.1126/science.aau3445. PMID 30213911. S2CID 52273353.
• Davidson, Eric (2009). "The contribution of manure and fertilizer nitrogen to atmospheric nitrous oxide since 1860". Nature Geoscience. 2: 659–662. doi:10.1016/j.chemer.2016.04.002.
• DeConto, Robert M.; Pollard, David (2016). "Contribution of Antarctica to past and future sea-level rise". Nature. 531 (7596): 591–597. Bibcode:2016Natur.531..591D. doi:10.1038/nature17145. ISSN 1476-4687. PMID 27029274. S2CID 205247890.
• Deutsch, Curtis; Brix, Holger; Ito, Taka; Frenzel, Hartmut; et al. (2011). "Climate-Forced Variability of Ocean Hypoxia" (PDF). Science. 333 (6040): 336–339. Bibcode:2011Sci...333..336D. doi:10.1126/science.1202422. PMID 21659566. S2CID 11752699. Archived (PDF) from the original on 9 May 2016.
• Doney, Scott C.; Fabry, Victoria J.; Feely, Richard A.; Kleypas, Joan A. (2009). "Ocean Acidification: The Other CO₂ Problem". Annual Review of Marine Science. 1 (1): 169–192. Bibcode:2009ARMS....1..169D. doi:10.1146/annurev.marine.010908.163834. PMID 21141034. S2CID 402398.
• Fahey, D. W.; Doherty, S. J.; Hibbard, K. A.; Romanou, A.; Taylor, P. C. (2017). "Chapter 2: Physical Drivers of Climate Change" (PDF). In USGCRP2017.
• Fischer, Tobias P.; Aiuppa, Alessandro (2020). "AGU Centennial Grand Challenge: Volcanoes and Deep Carbon Global CO2 Emissions From Subaerial Volcanism – Recent Progress and Future Challenges". Geochemistry, Geophysics, Geosystems. 21 (3): e08690. Bibcode:2020GGG....2108690F. doi:10.1029/2019GC008690. hdl:10447/498846. ISSN 1525-2027.
• Friedlingstein, Pierre; Jones, Matthew W.; O'Sullivan, Michael; Andrew, Robbie M.; et al. (2019). "Global Carbon Budget 2019". Earth System Science Data. 11 (4): 1783–1838. Bibcode:2019ESSD...11.1783F. doi:10.5194/essd-11-1783-2019. hdl:10871/39943. ISSN 1866-3508.
• Forster, P. M.; Smith, C. J.; Walsh, T.; Lamb, W. F.; et al. (2024). "Indicators of Global Climate Change 2023: annual update of large-scale indicators of the state of the climate system and human influence" (PDF). Earth System Science Data. 16 (6): 2625–2658. Bibcode:2023ESSD...15.2295F. doi:10.5194/essd-16-2625-2024. Retrieved 1 November 2024.
• Goyal, Rishav; England, Matthew H.; Sen Gupta, Alex; Jucker, Martin (2019). "Reduction in surface climate change achieved by the 1987 Montreal Protocol". Environmental Research Letters. 14 (12): 124041. Bibcode:2019ERL....14l4041G. doi:10.1088/1748-9326/ab4874. hdl:1959.4/unsworks_66865. ISSN 1748-9326.
• Grubb, M. (2003). "The Economics of the Kyoto Protocol" (PDF). World Economics. 4 (3): 144–145. Archived from the original (PDF) on 4 September 2012.
• Gunningham, Neil (2018). "Mobilising civil society: can the climate movement achieve transformational social change?" (PDF). Interface: A Journal for and About Social Movements. 10. Archived (PDF) from the original on 12 April 2019. Retrieved 12 April 2019.
• Hagmann, David; Ho, Emily H.; Loewenstein, George (2019). "Nudging out support for a carbon tax". Nature Climate Change. 9 (6): 484–489. Bibcode:2019NatCC...9..484H. doi:10.1038/s41558-019-0474-0. S2CID 182663891.
• Hansen, James; Sato, Makiko; Hearty, Paul; Ruedy, Reto; et al. (2016). "Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming could be dangerous". Atmospheric Chemistry and Physics. 16 (6): 3761–3812. arXiv:1602.01393. Bibcode:2016ACP....16.3761H. doi:10.5194/acp-16-3761-2016. ISSN 1680-7316. S2CID 9410444.
• Harvey, Jeffrey A.; Van den Berg, Daphne; Ellers, Jacintha; Kampen, Remko; et al. (2018). "Internet Blogs, Polar Bears, and Climate-Change Denial by Proxy". BioScience. 68 (4): 281–287. doi:10.1093/biosci/bix133. ISSN 0006-3568. PMC 5894087. PMID 29662248. (Erratum: doi:10.1093/biosci/biy033, PMID 29608770,  Retraction Watch)
• Hawkins, Ed; Ortega, Pablo; Suckling, Emma; Schurer, Andrew; et al. (2017). "Estimating Changes in Global Temperature since the Preindustrial Period". Bulletin of the American Meteorological Society. 98 (9): 1841–1856. Bibcode:2017BAMS...98.1841H. doi:10.1175/bams-d-16-0007.1. hdl:20.500.11820/f0ba8a1c-a259-4689-9fc3-77ec82fff5ab. ISSN 0003-0007.
• He, Yanyi; Wang, Kaicun; Zhou, Chunlüe; Wild, Martin (2018). "A Revisit of Global Dimming and Brightening Based on the Sunshine Duration". Geophysical Research Letters. 45 (9): 4281–4289. Bibcode:2018GeoRL..45.4281H. doi:10.1029/2018GL077424. hdl:20.500.11850/268470. ISSN 1944-8007.
• Hodder, Patrick; Martin, Brian (2009). "Climate Crisis? The Politics of Emergency Framing". Economic and Political Weekly. 44 (36): 53–60. ISSN 0012-9976. JSTOR 25663518.
• Joo, Gea-Jae; Kim, Ji Yoon; Do, Yuno; Lineman, Maurice (2015). "Talking about Climate Change and Global Warming". PLOS ONE. 10 (9): e0138996. Bibcode:2015PLoSO..1038996L. doi:10.1371/journal.pone.0138996. ISSN 1932-6203. PMC 4587979. PMID 26418127.
• Kabir, Russell; Khan, Hafiz T. A.; Ball, Emma; Caldwell, Khan (2016). "Climate Change Impact: The Experience of the Coastal Areas of Bangladesh Affected by Cyclones Sidr and Aila". Journal of Environmental and Public Health. 2016: 9654753. doi:10.1155/2016/9654753. PMC 5102735. PMID 27867400.
• Kaczan, David J.; Orgill-Meyer, Jennifer (2020). "The impact of climate change on migration: a synthesis of recent empirical insights". Climatic Change. 158 (3): 281–300. Bibcode:2020ClCh..158..281K. doi:10.1007/s10584-019-02560-0. S2CID 207988694. Retrieved 9 February 2021.
• Kennedy, J. J.; Thorne, W. P.; Peterson, T. C.; Ruedy, R. A.; et al. (2010). Arndt, D. S.; Baringer, M. O.; Johnson, M. R. (eds.). "How do we know the world has warmed?". Special supplement: State of the Climate in 2009. Bulletin of the American Meteorological Society. 91 (7). S26-S27. doi:10.1175/BAMS-91-7-StateoftheClimate.
• Kopp, R. E.; Hayhoe, K.; Easterling, D. R.; Hall, T.; et al. (2017). "Chapter 15: Potential Surprises: Compound Extremes and Tipping Elements". In USGCRP 2017. pp. 1–470. Archived from the original on 20 August 2018.
• Kossin, J. P.; Hall, T.; Knutson, T.; Kunkel, K. E.; Trapp, R. J.; Walizer, D. E.; Wehner, M. F. (2017). "Chapter 9: Extreme Storms". In USGCRP2017. pp. 1–470.
• Knutson, T. (2017). "Appendix C: Detection and attribution methodologies overview.". In USGCRP2017. pp. 1–470.
• Kreidenweis, Ulrich; Humpenöder, Florian; Stevanović, Miodrag; Bodirsky, Benjamin Leon; et al. (July 2016). "Afforestation to mitigate climate change: impacts on food prices under consideration of albedo effects". Environmental Research Letters. 11 (8): 085001. Bibcode:2016ERL....11h5001K. doi:10.1088/1748-9326/11/8/085001. ISSN 1748-9326. S2CID 8779827.
• Kvande, H. (2014). "The Aluminum Smelting Process". Journal of Occupational and Environmental Medicine. 56 (5 Suppl): S2–S4. doi:10.1097/JOM.0000000000000154. PMC 4131936. PMID 24806722.
• Lapenis, Andrei G. (1998). "Arrhenius and the Intergovernmental Panel on Climate Change". Eos. 79 (23): 271. Bibcode:1998EOSTr..79..271L. doi:10.1029/98EO00206.
• Levermann, Anders; Clark, Peter U.; Marzeion, Ben; Milne, Glenn A.; et al. (2013). "The multimillennial sea-level commitment of global warming". Proceedings of the National Academy of Sciences. 110 (34): 13745–13750. Bibcode:2013PNAS..11013745L. doi:10.1073/pnas.1219414110. ISSN 0027-8424. PMC 3752235. PMID 23858443.
• Lenoir, Jonathan; Bertrand, Romain; Comte, Lise; Bourgeaud, Luana; et al. (2020). "Species better track climate warming in the oceans than on land". Nature Ecology & Evolution. 4 (8): 1044–1059. Bibcode:2020NatEE...4.1044L. doi:10.1038/s41559-020-1198-2. ISSN 2397-334X. PMID 32451428. S2CID 218879068.
• Liepert, Beate G.; Previdi, Michael (2009). "Do Models and Observations Disagree on the Rainfall Response to Global Warming?". Journal of Climate. 22 (11): 3156–3166. Bibcode:2009JCli...22.3156L. doi:10.1175/2008JCLI2472.1.
• Liverman, Diana M. (2009). "Conventions of climate change: constructions of danger and the dispossession of the atmosphere". Journal of Historical Geography. 35 (2): 279–296. doi:10.1016/j.jhg.2008.08.008.
• Loeb, Norman G.; Johnson, Gregory C.; Thorsen, Tyler J.; Lyman, John M.; Rose, Fred G.; Kato, Seiji (2021). "Satellite and Ocean Data Reveal Marked Increase in Earth's Heating Rate". Geophysical Research Letters. 48 (13). American Geophysical Union (AGU). e2021GL093047. Bibcode:2021GeoRL..4893047L. doi:10.1029/2021gl093047. ISSN 0094-8276. S2CID 236233508.
• Mach, Katharine J.; Kraan, Caroline M.; Adger, W. Neil; Buhaug, Halvard; et al. (2019). "Climate as a risk factor for armed conflict". Nature. 571 (7764): 193–197. Bibcode:2019Natur.571..193M. doi:10.1038/s41586-019-1300-6. hdl:10871/37969. ISSN 1476-4687. PMID 31189956. S2CID 186207310.
• Matthews, H. Damon; Gillett, Nathan P.; Stott, Peter A.; Zickfeld, Kirsten (2009). "The proportionality of global warming to cumulative carbon emissions". Nature. 459 (7248): 829–832. Bibcode:2009Natur.459..829M. doi:10.1038/nature08047. ISSN 1476-4687. PMID 19516338. S2CID 4423773.
• Matthews, Tom (2018). "Humid heat and climate change". Progress in Physical Geography: Earth and Environment. 42 (3): 391–405. Bibcode:2018PrPG...42..391M. doi:10.1177/0309133318776490. S2CID 134820599.
• McNeill, V. Faye (2017). "Atmospheric Aerosols: Clouds, Chemistry, and Climate". Annual Review of Chemical and Biomolecular Engineering. 8 (1): 427–444. doi:10.1146/annurev-chembioeng-060816-101538. ISSN 1947-5438. PMID 28415861.
• Melillo, J. M.; Frey, S. D.; DeAngelis, K. M.; Werner, W. J.; et al. (2017). "Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world". Science. 358 (6359): 101–105. Bibcode:2017Sci...358..101M. doi:10.1126/science.aan2874. hdl:1912/9383. PMID 28983050.
• Mercure, J.-F.; Pollitt, H.; Viñuales, J. E.; Edwards, N. R.; et al. (2018). "Macroeconomic impact of stranded fossil fuel assets" (PDF). Nature Climate Change. 8 (7): 588–593. Bibcode:2018NatCC...8..588M. doi:10.1038/s41558-018-0182-1. hdl:10871/37807. ISSN 1758-6798. S2CID 89799744.
• Mitchum, G. T.; Masters, D.; Hamlington, B. D.; Fasullo, J. T.; et al. (2018). "Climate-change–driven accelerated sea-level rise detected in the altimeter era". Proceedings of the National Academy of Sciences. 115 (9): 2022–2025. Bibcode:2018PNAS..115.2022N. doi:10.1073/pnas.1717312115. ISSN 0027-8424. PMC 5834701. PMID 29440401.
• Mora, Camilo; Dousset, Bénédicte; Caldwell, Iain R.; Powell, Farrah E.; Geronimo, Rollan C.; Bielecki, Coral R.; Counsell, Chelsie W. W.; Dietrich, Bonnie S.; Johnston, Emily T.; Louis, Leo V.; Lucas, Matthew P.; McKenzie, Marie M.; Shea, Alessandra G.; Tseng, Han; Giambelluca, Thomas W.; Leon, Lisa R.; Hawkins, Ed; Trauernicht, Clay (2017). "Global risk of deadly heat". Nature Climate Change. 7 (7): 501–506. Bibcode:2017NatCC...7..501M. doi:10.1038/nclimate3322.
• National Academies of Sciences, Engineering, and Medicine (2019). Negative Emissions Technologies and Reliable Sequestration: A Research Agenda (Report). Washington, D.C.: The National Academies Press. doi:10.17226/25259. ISBN 978-0-309-48455-8.
• National Research Council (2011). "Causes and Consequences of Climate Change". America's Climate Choices. Washington, D.C.: The National Academies Press. doi:10.17226/12781. ISBN 978-0-309-14585-5. Archived from the original on 21 July 2015. Retrieved 28 January 2019.
• Neukom, Raphael; Steiger, Nathan; Gómez-Navarro, Juan José; Wang, Jianghao; et al. (2019a). "No evidence for globally coherent warm and cold periods over the preindustrial Common Era" (PDF). Nature. 571 (7766): 550–554. Bibcode:2019Natur.571..550N. doi:10.1038/s41586-019-1401-2. ISSN 1476-4687. PMID 31341300. S2CID 198494930.
• Neukom, Raphael; Barboza, Luis A.; Erb, Michael P.; Shi, Feng; et al. (2019b). "Consistent multidecadal variability in global temperature reconstructions and simulations over the Common Era". Nature Geoscience. 12 (8): 643–649. Bibcode:2019NatGe..12..643P. doi:10.1038/s41561-019-0400-0. ISSN 1752-0908. PMC 6675609. PMID 31372180.
• O'Neill, Saffron J.; Boykoff, Max (2010). "Climate denier, skeptic, or contrarian?". Proceedings of the National Academy of Sciences of the United States of America. 107 (39): E151. Bibcode:2010PNAS..107E.151O. doi:10.1073/pnas.1010507107. ISSN 0027-8424. PMC 2947866. PMID 20807754.
• Poloczanska, Elvira S.; Brown, Christopher J.; Sydeman, William J.; Kiessling, Wolfgang; et al. (2013). "Global imprint of climate change on marine life" (PDF). Nature Climate Change. 3 (10): 919–925. Bibcode:2013NatCC...3..919P. doi:10.1038/nclimate1958. hdl:2160/34111. ISSN 1758-6798.
• Rahmstorf, Stefan; Cazenave, Anny; Church, John A.; Hansen, James E.; et al. (2007). "Recent Climate Observations Compared to Projections" (PDF). Science. 316 (5825): 709. Bibcode:2007Sci...316..709R. doi:10.1126/science.1136843. PMID 17272686. S2CID 34008905. Archived (PDF) from the original on 6 September 2018.
• Ramanathan, V.; Carmichael, G. (2008). "Global and Regional Climate Changes due to Black Carbon". Nature Geoscience. 1 (4): 221–227. Bibcode:2008NatGe...1..221R. doi:10.1038/ngeo156.
• Randel, William J.; Shine, Keith P.; Austin, John; Barnett, John; et al. (2009). "An update of observed stratospheric temperature trends". Journal of Geophysical Research. 114 (D2): D02107. Bibcode:2009JGRD..114.2107R. doi:10.1029/2008JD010421. HAL hal-00355600.
• Rauner, Sebastian; Bauer, Nico; Dirnaichner, Alois; Van Dingenen, Rita; Mutel, Chris; Luderer, Gunnar (2020). "Coal-exit health and environmental damage reductions outweigh economic impacts". Nature Climate Change. 10 (4): 308–312. Bibcode:2020NatCC..10..308R. doi:10.1038/s41558-020-0728-x. ISSN 1758-6798. S2CID 214619069.
• Rogelj, Joeri; Forster, Piers M.; Kriegler, Elmar; Smith, Christopher J.; et al. (2019). "Estimating and tracking the remaining carbon budget for stringent climate targets". Nature. 571 (7765): 335–342. Bibcode:2019Natur.571..335R. doi:10.1038/s41586-019-1368-z. hdl:10044/1/78011. ISSN 1476-4687. PMID 31316194. S2CID 197542084.
• Romanello, M; et al. (2022). "The 2022 report of the Lancet Countdown on health and climate change: health at the mercy of fossil fuels" (PDF). The Lancet. 400 (10363): 1619–1654. doi:10.1016/S0140-6736(22)01540-9. PMC 7616806. PMID 36306815.
• Romanello, M; et al. (2023). "The 2023 report of the Lancet Countdown on health and climate change: the imperative for a health-centred response in a world facing irreversible harms" (PDF). The Lancet. 402 (10419): 2346–2394. doi:10.1016/S0140-6736(23)01859-7. PMC 7616810. PMID 37977174.
• Ruseva, Tatyana; Hedrick, Jamie; Marland, Gregg; Tovar, Henning; et al. (2020). "Rethinking standards of permanence for terrestrial and coastal carbon: implications for governance and sustainability". Current Opinion in Environmental Sustainability. 45: 69–77. Bibcode:2020COES...45...69R. doi:10.1016/j.cosust.2020.09.009. ISSN 1877-3435. S2CID 229069907.
• Samset, B. H.; Sand, M.; Smith, C. J.; Bauer, S. E.; et al. (2018). "Climate Impacts From a Removal of Anthropogenic Aerosol Emissions" (PDF). Geophysical Research Letters. 45 (2): 1020–1029. Bibcode:2018GeoRL..45.1020S. doi:10.1002/2017GL076079. ISSN 1944-8007. PMC 7427631. PMID 32801404.
• Sand, M.; Berntsen, T. K.; von Salzen, K.; Flanner, M. G.; et al. (2015). "Response of Arctic temperature to changes in emissions of short-lived climate forcers". Nature. 6 (3): 286–289. Bibcode:2016NatCC...6..286S. doi:10.1038/nclimate2880.
• Schmidt, Gavin A.; Ruedy, Reto A.; Miller, Ron L.; Lacis, Andy A. (2010). "Attribution of the present-day total greenhouse effect". Journal of Geophysical Research: Atmospheres. 115 (D20): D20106. Bibcode:2010JGRD..11520106S. doi:10.1029/2010JD014287. ISSN 2156-2202. S2CID 28195537.
• Serdeczny, Olivia; Adams, Sophie; Baarsch, Florent; Coumou, Dim; et al. (2016). "Climate change impacts in Sub-Saharan Africa: from physical changes to their social repercussions" (PDF). Regional Environmental Change. 17 (6): 1585–1600. doi:10.1007/s10113-015-0910-2. hdl:1871.1/c8dfb143-d9e1-4eef-9bbe-67b3c338d07f. ISSN 1436-378X. S2CID 3900505.
• Sutton, Rowan T.; Dong, Buwen; Gregory, Jonathan M. (2007). "Land/sea warming ratio in response to climate change: IPCC AR4 model results and comparison with observations". Geophysical Research Letters. 34 (2): L02701. Bibcode:2007GeoRL..34.2701S. doi:10.1029/2006GL028164.
• Smale, Dan A.; Wernberg, Thomas; Oliver, Eric C. J.; Thomsen, Mads; Harvey, Ben P. (2019). "Marine heatwaves threaten global biodiversity and the provision of ecosystem services" (PDF). Nature Climate Change. 9 (4): 306–312. Bibcode:2019NatCC...9..306S. doi:10.1038/s41558-019-0412-1. ISSN 1758-6798. S2CID 91471054.
• Smith, Joel B.; Schneider, Stephen H.; Oppenheimer, Michael; Yohe, Gary W.; et al. (2009). "Assessing dangerous climate change through an update of the Intergovernmental Panel on Climate Change (IPCC) 'reasons for concern'". Proceedings of the National Academy of Sciences. 106 (11): 4133–4137. Bibcode:2009PNAS..106.4133S. doi:10.1073/pnas.0812355106. PMC 2648893. PMID 19251662.
• Smith, N.; Leiserowitz, A. (2013). "The role of emotion in global warming policy support and opposition". Risk Analysis. 34 (5): 937–948. doi:10.1111/risa.12140. PMC 4298023. PMID 24219420.
• Stroeve, J.; Holland, Marika M.; Meier, Walt; Scambos, Ted; et al. (2007). "Arctic sea ice decline: Faster than forecast". Geophysical Research Letters. 34 (9): L09501. Bibcode:2007GeoRL..34.9501S. doi:10.1029/2007GL029703.
• Storelvmo, T.; Phillips, P. C. B.; Lohmann, U.; Leirvik, T.; Wild, M. (2016). "Disentangling greenhouse warming and aerosol cooling to reveal Earth's climate sensitivity" (PDF). Nature Geoscience. 9 (4): 286–289. Bibcode:2016NatGe...9..286S. doi:10.1038/ngeo2670. ISSN 1752-0908.
• The Cenozoic CO₂ Proxy Integration Project (CenCOPIP) Consortium; Hönisch, Bärbel; Royer, Dana L.; Breecker, Daniel O.; Polissar, Pratigya J.; Bowen, Gabriel J.; Henehan, Michael J.; Cui, Ying; Steinthorsdottir, Margret; McElwain, Jennifer C.; Kohn, Matthew J.; Pearson, Ann; Phelps, Samuel R.; Uno, Kevin T.; Ridgwell, Andy (2023). "Toward a Cenozoic history of atmospheric CO₂". Science. 382 (6675): eadi5177. Bibcode:2023Sci...382i5177T. doi:10.1126/science.adi5177. hdl:10023/30475. ISSN 0036-8075. PMID 38060645.{{cite journal}}: CS1 maint: numeric names: authors list (link)
• Turetsky, Merritt R.; Abbott, Benjamin W.; Jones, Miriam C.; Anthony, Katey Walter; et al. (2019). "Permafrost collapse is accelerating carbon release". Nature. 569 (7754): 32–34. Bibcode:2019Natur.569...32T. doi:10.1038/d41586-019-01313-4. PMID 31040419.
• Turner, Monica G.; Calder, W. John; Cumming, Graeme S.; Hughes, Terry P.; et al. (2020). "Climate change, ecosystems and abrupt change: science priorities". Philosophical Transactions of the Royal Society B. 375 (1794). doi:10.1098/rstb.2019.0105. PMC 7017767. PMID 31983326.
• Twomey, S. (1977). "The Influence of Pollution on the Shortwave Albedo of Clouds". J. Atmos. Sci. 34 (7): 1149–1152. Bibcode:1977JAtS...34.1149T. doi:10.1175/1520-0469(1977)034<1149:TIOPOT>2.0.CO;2. ISSN 1520-0469.
• Tyndall, John (1861). "On the Absorption and Radiation of Heat by Gases and Vapours, and on the Physical Connection of Radiation, Absorption, and Conduction". Philosophical Magazine. 4. 22: 169–194, 273–285. Archived from the original on 26 March 2016.
• Urban, Mark C. (2015). "Accelerating extinction risk from climate change". Science. 348 (6234): 571–573. Bibcode:2015Sci...348..571U. doi:10.1126/science.aaa4984. ISSN 0036-8075. PMID 25931559.
• USGCRP (2009). Karl, T. R.; Melillo, J.; Peterson, T.; Hassol, S. J. (eds.). Global Climate Change Impacts in the United States. Cambridge University Press. ISBN 978-0-521-14407-0. Archived from the original on 6 April 2010. Retrieved 19 January 2024.
• USGCRP (2017). Wuebbles, D. J.; Fahey, D. W.; Hibbard, K. A.; Dokken, D. J.; et al. (eds.). Climate Science Special Report: Fourth National Climate Assessment, Volume I. Washington, D.C.: U.S. Global Change Research Program. pp. 1–470. doi:10.7930/J0J964J6.
• Vandyck, T.; Keramidas, K.; Kitous, A.; Spadaro, J.; et al. (2018). "Air quality co-benefits for human health and agriculture counterbalance costs to meet Paris Agreement pledges". Nature Communications. 9 (4939): 4939. Bibcode:2018NatCo...9.4939V. doi:10.1038/s41467-018-06885-9. PMC 6250710. PMID 30467311.
• Velders, G. J. M.; Andersen, S. O.; et al. (2007). "The importance of the Montreal Protocol in protecting climate". Proceedings of the National Academy of Sciences of the United States of America. 104 (12): 4814–4819. Bibcode:2007PNAS..104.4814V. doi:10.1073/pnas.0610328104. PMC 1817831. PMID 17360370.
• Velders, G. J. M.; et al. (2022). "Projections of hydrofluorocarbon (HFC) emissions and the resulting global warming based on recent trends in observed abundances and current policies". Atmospheric Chemistry and Physics. 22 (9): 6087–6101. Bibcode:2022ACP....22.6087V. doi:10.5194/acp-22-6087-2022. hdl:1721.1/148197.
• Wuebbles, D. J.; Easterling, D. R.; Hayhoe, K.; Knutson, T.; et al. (2017). "Chapter 1: Our Globally Changing Climate" (PDF). In USGCRP2017.
• Walsh, John; Wuebbles, Donald; Hayhoe, Katherine; Kossin, Kossin; et al. (2014). "Appendix 3: Climate Science Supplement" (PDF). Climate Change Impacts in the United States: The Third National Climate Assessment. US National Climate Assessment.
• Wang, Bin; Shugart, Herman H.; Lerdau, Manuel T. (2017). "Sensitivity of global greenhouse gas budgets to tropospheric ozone pollution mediated by the biosphere". Environmental Research Letters. 12 (8): 084001. Bibcode:2017ERL....12h4001W. doi:10.1088/1748-9326/aa7885. ISSN 1748-9326.
• Watts, Nick; Amann, Markus; Arnell, Nigel; Ayeb-Karlsson, Sonja; et al. (2019). "The 2019 report of The Lancet Countdown on health and climate change: ensuring that the health of a child born today is not defined by a changing climate". The Lancet. 394 (10211): 1836–1878. Bibcode:2019Lanc..394.1836W. doi:10.1016/S0140-6736(19)32596-6. hdl:10871/40583. ISSN 0140-6736. PMID 31733928. S2CID 207976337.
• Weart, Spencer (2013). "Rise of interdisciplinary research on climate". Proceedings of the National Academy of Sciences. 110 (Supplement 1): 3657–3664. doi:10.1073/pnas.1107482109. PMC 3586608. PMID 22778431.
• Wild, M.; Gilgen, Hans; Roesch, Andreas; Ohmura, Atsumu; et al. (2005). "From Dimming to Brightening: Decadal Changes in Solar Radiation at Earth's Surface". Science. 308 (5723): 847–850. Bibcode:2005Sci...308..847W. doi:10.1126/science.1103215. PMID 15879214. S2CID 13124021.
• Williams, Richard G; Ceppi, Paulo; Katavouta, Anna (2020). "Controls of the transient climate response to emissions by physical feedbacks, heat uptake and carbon cycling". Environmental Research Letters. 15 (9): 0940c1. Bibcode:2020ERL....15i40c1W. doi:10.1088/1748-9326/ab97c9. hdl:10044/1/80154.
• Wolff, Eric W.; Shepherd, John G.; Shuckburgh, Emily; Watson, Andrew J. (2015). "Feedbacks on climate in the Earth system: introduction". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 373 (2054): 20140428. Bibcode:2015RSPTA.37340428W. doi:10.1098/rsta.2014.0428. PMC 4608041. PMID 26438277.
• Young, Paul J.; Harper, Anna B.; Huntingford, Chris; et al. (2021). "The Montreal Protocol protects the terrestrial carbon sink". Nature. 596 (7872): 384–388. Bibcode:2021Natur.596..384Y. doi:10.1038/s41586-021-03737-3. PMID 34408332.
• Zeng, Ning; Yoon, Jinho (2009). "Expansion of the world's deserts due to vegetation-albedo feedback under global warming". Geophysical Research Letters. 36 (17): L17401. Bibcode:2009GeoRL..3617401Z. doi:10.1029/2009GL039699. ISSN 1944-8007. S2CID 1708267.
• Zhang, Jinlun; Lindsay, Ron; Steele, Mike; Schweiger, Axel (2008). "What drove the dramatic arctic sea ice retreat during summer 2007?". Geophysical Research Letters. 35 (11): 1–5. Bibcode:2008GeoRL..3511505Z. doi:10.1029/2008gl034005. S2CID 9387303.

Books, reports and legal documents

• Academia Brasileira de Ciéncias (Brazil); Royal Society of Canada; Chinese Academy of Sciences; Académie des Sciences (France); Deutsche Akademie der Naturforscher Leopoldina (Germany); Indian National Science Academy; Accademia Nazionale dei Lincei (Italy); Science Council of Japan, Academia Mexicana de Ciencias; Academia Mexicana de Ciencias (Mexico); Russian Academy of Sciences; Academy of Science of South Africa; Royal Society (United Kingdom); National Academy of Sciences (United States of America) (May 2009). "G8+5 Academies' joint statement: Climate change and the transformation of energy technologies for a low carbon future" (PDF). The National Academies of Sciences, Engineering, and Medicine. Archived from the original (PDF) on 15 February 2010. Retrieved 5 May 2010.
• Archer, David; Pierrehumbert, Raymond (2013). The Warming Papers: The Scientific Foundation for the Climate Change Forecast. John Wiley & Sons. ISBN 978-1-118-68733-8.
• Bridle, Richard; Sharma, Shruti; Mostafa, Mostafa; Geddes, Anna (June 2019). Fossil Fuel to Clean Energy Subsidy Swaps (PDF) (Report).
• Climate Focus (December 2015). "The Paris Agreement: Summary. Climate Focus Client Brief on the Paris Agreement III" (PDF). Archived (PDF) from the original on 5 October 2018. Retrieved 12 April 2019.
• Conceição; et al. (2020). Human Development Report 2020 The Next Frontier: Human Development and the Anthropocene (PDF) (Report). United Nations Development Programme. Retrieved 9 January 2021.
• DeFries, Ruth; Edenhofer, Ottmar; Halliday, Alex; Heal, Geoffrey; et al. (September 2019). The missing economic risks in assessments of climate change impacts (PDF) (Report). Grantham Research Institute on Climate Change and the Environment, London School of Economics and Political Science.
• Dessler, Andrew E. and Edward A. Parson, eds. The science and politics of global climate change: A guide to the debate (Cambridge University Press, 2019).
• Dessai, Suraje (2001). "The climate regime from The Hague to Marrakech: Saving or sinking the Kyoto Protocol?" (PDF). Tyndall Centre Working Paper 12. Tyndall Centre. Archived from the original (PDF) on 10 June 2012. Retrieved 5 May 2010.
• Dunlap, Riley E.; McCright, Aaron M. (2011). "Chapter 10: Organized climate change denial". In Dryzek, John S.; Norgaard, Richard B.; Schlosberg, David (eds.). The Oxford Handbook of Climate Change and Society. Oxford University Press. pp. 144–160. ISBN 978-0-19-956660-0.
• Dunlap, Riley E.; McCright, Aaron M. (2015). "Chapter 10: Challenging Climate Change: The Denial Countermovement". In Dunlap, Riley E.; Brulle, Robert J. (eds.). Climate Change and Society: Sociological Perspectives. Oxford University Press. pp. 300–332. ISBN 978-0-19-935611-9.
• Ebi, Kristie L.; Balbus, John; Luber, George; Bole, Aparna; Crimmins, Allison R.; Glass, Gregory E.; Saha, Shubhayu; Shimamoto, Mark M.; Trtanj, Juli M.; White-Newsome, Jalonne L. (2018). Chapter 14 : Human Health. Impacts, Risks, and Adaptation in the United States: The Fourth National Climate Assessment, Volume II (Report). doi:10.7930/nca4.2018.ch14.
• Flavell, Alex (2014). IOM outlook on migration, environment and climate change (PDF) (Report). Geneva, Switzerland: International Organization for Migration (IOM). ISBN 978-92-9068-703-0. OCLC 913058074.
• Fleming, James Rodger (2007). The Callendar Effect: the life and work of Guy Stewart Callendar (1898–1964). Boston: American Meteorological Society. ISBN 978-1-878220-76-9.
• Flynn, C.; Yamasumi, E.; Fisher, S.; Snow, D.; et al. (January 2021). Peoples' Climate Vote (PDF) (Report). UNDP and University of Oxford. Retrieved 5 August 2021.
• Flynn, C.; Jardon, S. T.; et al. (June 2024). Peoples' Climate Vote 2024 Results (PDF) (Report). UNDP and University of Oxford. Retrieved 1 November 2024.
• Global Methane Initiative (2020). Global Methane Emissions and Mitigation Opportunities (PDF) (Report). Global Methane Initiative.
• Hallegatte, Stephane; Bangalore, Mook; Bonzanigo, Laura; Fay, Marianne; et al. (2016). Shock Waves : Managing the Impacts of Climate Change on Poverty. Climate Change and Development (PDF). Washington, D.C.: World Bank. doi:10.1596/978-1-4648-0673-5. hdl:10986/22787. ISBN 978-1-4648-0674-2.
• Haywood, Jim (2016). "Chapter 27 – Atmospheric Aerosols and Their Role in Climate Change". In Letcher, Trevor M. (ed.). Climate Change: Observed Impacts on Planet Earth. Elsevier. ISBN 978-0-444-63524-2.
• IEA (December 2020). "COVID-19 and energy efficiency". Energy Efficiency 2020 (Report). Paris, France. Retrieved 6 April 2021.
• IEA (October 2021). Net Zero By 2050: A Roadmap for the Global Energy Sector (PDF) (Report). Paris, France. Retrieved 4 April 2022.
• IEA (October 2023). World Energy Outlook 2023 (PDF) (Report). Paris, France. Retrieved 25 October 2021.
• Krogstrup, Signe; Oman, William (4 September 2019). Macroeconomic and Financial Policies for Climate Change Mitigation: A Review of the Literature (PDF). IMF working papers. Vol. 19. doi:10.5089/9781513511955.001. ISBN 978-1-5135-1195-5. ISSN 1018-5941. S2CID 203245445.
• Leiserowitz, A.; Carman, J.; Buttermore, N.; Wang, X.; et al. (2021). International Public Opinion on Climate Change (PDF) (Report). New Haven, CT: Yale Program on Climate Change Communication and Facebook Data for Good. Retrieved 5 August 2021.
• Letcher, Trevor M., ed. (2020). Future Energy: Improved, Sustainable and Clean Options for our Planet (Third ed.). Elsevier. ISBN 978-0-08-102886-5.
• Meinshausen, Malte (2019). "Implications of the Developed Scenarios for Climate Change". In Teske, Sven (ed.). Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5 °C and +2 °C. Springer International Publishing. pp. 459–469. doi:10.1007/978-3-030-05843-2_12. ISBN 978-3-030-05843-2. S2CID 133868222.
• Miller, J.; Du, L.; Kodjak, D. (2017). Impacts of World-Class Vehicle Efficiency and Emissions Regulations in Select G20 Countries (PDF) (Report). Washington, D.C.: The International Council on Clean Transportation.
• Müller, Benito (February 2010). Copenhagen 2009: Failure or final wake-up call for our leaders? EV 49 (PDF). Oxford Institute for Energy Studies. p. i. ISBN 978-1-907555-04-6. Archived (PDF) from the original on 10 July 2017. Retrieved 18 May 2010.
• National Academies (2008). Understanding and responding to climate change: Highlights of National Academies Reports, 2008 edition (PDF) (Report). National Academy of Sciences. Archived from the original (PDF) on 11 October 2017. Retrieved 9 November 2010.
• National Research Council (2012). Climate Change: Evidence, Impacts, and Choices (Report). Washington, D.C.: National Academy of Sciences. Retrieved 21 November 2023.
• Newell, Peter (14 December 2006). Climate for Change: Non-State Actors and the Global Politics of the Greenhouse. Cambridge University Press. ISBN 978-0-521-02123-4. Retrieved 30 July 2018.
• NOAA. "January 2017 analysis from NOAA: Global and Regional Sea Level Rise Scenarios for the United States" (PDF). Archived (PDF) from the original on 18 December 2017. Retrieved 7 February 2019.
• Olivier, J. G. J.; Peters, J. A. H. W. (2019). Trends in global CO2 and total greenhouse gas emissions (PDF). The Hague: PBL Netherlands Environmental Assessment Agency.
• Oreskes, Naomi (2007). "The scientific consensus on climate change: How do we know we're not wrong?". In DiMento, Joseph F. C.; Doughman, Pamela M. (eds.). Climate Change: What It Means for Us, Our Children, and Our Grandchildren. The MIT Press. ISBN 978-0-262-54193-0.
• Oreskes, Naomi; Conway, Erik (2010). Merchants of Doubt: How a Handful of Scientists Obscured the Truth on Issues from Tobacco Smoke to Global Warming (first ed.). Bloomsbury Press. ISBN 978-1-59691-610-4.
• Pew Research Center (November 2015). Global Concern about Climate Change, Broad Support for Limiting Emissions (PDF) (Report). Retrieved 5 August 2021.
• REN21 (2020). Renewables 2020 Global Status Report (PDF). Paris: REN21 Secretariat. ISBN 978-3-948393-00-7.{{cite book}}: CS1 maint: numeric names: authors list (link)
• Royal Society (13 April 2005). Economic Affairs – Written Evidence. The Economics of Climate Change, the Second Report of the 2005–2006 session, produced by the UK Parliament House of Lords Economics Affairs Select Committee. UK Parliament. Archived from the original on 13 November 2011. Retrieved 9 July 2011.
• Setzer, Joana; Byrnes, Rebecca (July 2019). Global trends in climate change litigation: 2019 snapshot (PDF). London: the Grantham Research Institute on Climate Change and the Environment and the Centre for Climate Change Economics and Policy.
• Steinberg, D.; Bielen, D.; et al. (July 2017). Electrification & Decarbonization: Exploring U.S. Energy Use and Greenhouse Gas Emissions in Scenarios with Widespread Electrification and Power Sector Decarbonization (PDF) (Report). Golden, Colorado: National Renewable Energy Laboratory.
• Teske, Sven, ed. (2019). "Executive Summary" (PDF). Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5 °C and +2 °C. Springer International Publishing. pp. xiii–xxxv. doi:10.1007/978-3-030-05843-2. ISBN 978-3-030-05843-2. S2CID 198078901.
• Teske, Sven; Pregger, Thomas; Naegler, Tobias; Simon, Sonja; et al. (2019). "Energy Scenario Results". In Teske, Sven (ed.). Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5 °C and +2 °C. Springer International Publishing. pp. 175–402. doi:10.1007/978-3-030-05843-2_8. ISBN 978-3-030-05843-2.
• Teske, Sven (2019). "Trajectories for a Just Transition of the Fossil Fuel Industry". In Teske, Sven (ed.). Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5 °C and +2 °C. Springer International Publishing. pp. 403–411. doi:10.1007/978-3-030-05843-2_9. ISBN 978-3-030-05843-2. S2CID 133961910.
• UN FAO (2016). Global Forest Resources Assessment 2015. How are the world's forests changing? (PDF) (Report). Food and Agriculture Organization of the United Nations. ISBN 978-92-5-109283-5. Retrieved 1 December 2019.
• Emissions Gap Report 2019 (PDF). Nairobi: United Nations Environment Programme. 2019. ISBN 978-92-807-3766-0.
• Emissions Gap Report 2024. Nairobi: United Nations Environment Programme. 2024. ISBN 978-92-807-4185-8.
• UNEP (2018). The Adaptation Gap Report 2018. Nairobi, Kenya: United Nations Environment Programme (UNEP). ISBN 978-92-807-3728-8.
• UNFCCC (1992). United Nations Framework Convention on Climate Change (PDF).
• UNFCCC (1997). "Kyoto Protocol to the United Nations Framework Convention on Climate Change". United Nations.
• UNFCCC (30 March 2010). "Decision 2/CP.15: Copenhagen Accord". Report of the Conference of the Parties on its fifteenth session, held in Copenhagen from 7 to 19 December 2009. United Nations Framework Convention on Climate Change. FCCC/CP/2009/11/Add.1. Archived from the original on 30 April 2010. Retrieved 17 May 2010.
• UNFCCC (2015). "Paris Agreement" (PDF). United Nations Framework Convention on Climate Change.
• UNFCCC (26 February 2021). Nationally determined contributions under the Paris Agreement Synthesis report by the secretariat (PDF) (Report). United Nations Framework Convention on Climate Change.
• Park, Susin (May 2011). "Climate Change and the Risk of Statelessness: The Situation of Low-lying Island States" (PDF). United Nations High Commissioner for Refugees. Archived (PDF) from the original on 2 May 2013. Retrieved 13 April 2012.
• United States Environmental Protection Agency (2016). Methane and Black Carbon Impacts on the Arctic: Communicating the Science (Report). Archived from the original on 6 September 2017. Retrieved 27 February 2019.
• Van Oldenborgh, Geert-Jan; Philip, Sjoukje; Kew, Sarah; Vautard, Robert; et al. (2019). "Human contribution to the record-breaking June 2019 heat wave in France". Semantic Scholar. S2CID 199454488.
• Weart, Spencer (October 2008). The Discovery of Global Warming (2nd ed.). Cambridge, MA: Harvard University Press. ISBN 978-0-674-03189-0. Archived from the original on 18 November 2016. Retrieved 16 June 2020.
• Weart, Spencer (February 2019). The Discovery of Global Warming (online ed.). Archived from the original on 18 June 2020. Retrieved 19 June 2020.
  • Weart, Spencer (January 2020). "The Carbon Dioxide Greenhouse Effect". The Discovery of Global Warming. American Institute of Physics. Archived from the original on 11 November 2016. Retrieved 19 June 2020.
  • Weart, Spencer (January 2020). "The Public and Climate Change". The Discovery of Global Warming. American Institute of Physics. Archived from the original on 11 November 2016. Retrieved 19 June 2020.
    • Weart, Spencer (January 2020). "The Public and Climate Change: Suspicions of a Human-Caused Greenhouse (1956–1969)". The Discovery of Global Warming. American Institute of Physics. Archived from the original on 11 November 2016. Retrieved 19 June 2020.
  • Weart, Spencer (January 2020). "The Public and Climate Change (cont. – since 1980)". The Discovery of Global warming. American Institute of Physics. Archived from the original on 11 November 2016. Retrieved 19 June 2020.
    • Weart, Spencer (January 2020). "The Public and Climate Change: The Summer of 1988". The Discovery of Global Warming. American Institute of Physics. Archived from the original on 11 November 2016. Retrieved 19 June 2020.
• State and Trends of Carbon Pricing 2019 (PDF) (Report). Washington, D.C.: World Bank. June 2019. doi:10.1596/978-1-4648-1435-8. hdl:10986/29687. ISBN 978-1-4648-1435-8.
• World Economic Forum (2024). Quantifying the Impact of Climate Change on Human Health (PDF) (Report).{{cite report}}: CS1 maint: ref duplicates default (link)
• World Health Organization (2016). Ambient air pollution: a global assessment of exposure and burden of disease (Report). Geneva, Switzerland. ISBN 978-92-4-151135-3.
• COP24 Special Report Health and Climate Change (PDF). Geneva: World Health Organization. 2018. ISBN 978-92-4-151497-2.
• World Meteorological Organization (2022). Scientific Assessment of Ozone Depletion (PDF) (Report). GAW Report No. 278. Geneva: World Meteorological Organization. ISBN 978-9914-733-99-0.
  • World Meteorological Organization (2022). "Executive Summary" (PDF). WMO SAOD 2022.
• WMO Statement on the State of the Global Climate in 2023. WMO-No. 1347. Geneva: World Meteorological Organization. 2024. ISBN 978-92-63-11347-4.
• WMO Global Annual to Decadal Climate Update: 2024-2028 (Report). Geneva: World Meteorological Organization. 2024.
• Creating a Sustainable Food Future: A Menu of Solutions to Feed Nearly 10 Billion People by 2050 (PDF). Washington, D.C.: World Resources Institute. December 2019. ISBN 978-1-56973-953-2.

Non-technical sources

• Associated Press
  • Colford, Paul (22 September 2015). "An addition to AP Stylebook entry on global warming". AP Style Blog. Retrieved 6 November 2019.
• BBC
  • "UK Parliament declares climate change emergency". BBC. 1 May 2019. Retrieved 30 June 2019.
  • Rigby, Sara (3 February 2020). "Climate change: should we change the terminology?". BBC Science Focus Magazine. Retrieved 24 March 2020.
• Bulletin of the Atomic Scientists
  • Stover, Dawn (23 September 2014). "The global warming 'hiatus'". Bulletin of the Atomic Scientists. Archived from the original on 11 July 2020.
• Carbon Brief
  • Yeo, Sophie (4 January 2017). "Clean energy: The challenge of achieving a 'just transition' for workers". Carbon Brief. Retrieved 18 May 2020.
  • McSweeney, Robert M. (19 June 2017). "Billions to face 'deadly threshold' of heat extremes by 2100, finds study". Carbon Brief.
  • Yeo, Sophie (21 November 2017). "Explainer: Why a UN climate deal on HFCs matters". Carbon Brief. Archived from the original on 1 May 2024. Retrieved 10 January 2021.
  • McSweeney, Robert M.; Hausfather, Zeke (15 January 2018). "Q&A: How do climate models work?". Carbon Brief. Archived from the original on 5 March 2019. Retrieved 2 March 2019.
  • Hausfather, Zeke (19 April 2018). "Explainer: How 'Shared Socioeconomic Pathways' explore future climate change". Carbon Brief. Retrieved 20 July 2019.
  • Hausfather, Zeke (8 October 2018). "Analysis: Why the IPCC 1.5C report expanded the carbon budget". Carbon Brief. Retrieved 28 July 2020.
  • Dunne, Daisy; Gabbatiss, Josh; McSweeney, Robert (7 January 2020). "Media reaction: Australia's bushfires and climate change". Carbon Brief. Retrieved 11 January 2020.
  • McSweeney, Robert (10 February 2020). "Nine Tipping Points That Could Be Triggered by Climate Change". Carbon Brief. Archived from the original on 7 October 2024. Retrieved 27 May 2022.
  • Gabbatiss, Josh; Tandon, Ayesha (4 October 2021). "In-depth Q&A: What is 'climate justice'?". Carbon Brief. Retrieved 16 October 2021.
  • Hausfather, Zeke; Forster, Piers (3 July 2023). "Analysis: How low-sulphur shipping rules are affecting global warming". Carbon Brief. Retrieved 2 November 2024.
• Climate.gov
  • Lindsey, Rebecca (23 June 2022). "Climate Change: Atmospheric Carbon Dioxide". Climate.gov. Retrieved 7 May 2023.
• Deutsche Welle
  • Ruiz, Irene Banos (22 June 2019). "Climate Action: Can We Change the Climate From the Grassroots Up?". Deutsche Welle. Archived from the original on 23 June 2019. Retrieved 23 June 2019.
• EPA
  • "Myths vs. Facts: Denial of Petitions for Reconsideration of the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act". U.S. Environmental Protection Agency. 10 September 2020. Archived from the original on 23 May 2021. Retrieved 7 August 2017.
  • "Global Greenhouse Gas Emissions Data". U.S. Environmental Protection Agency. 10 September 2024. Archived from the original on 18 February 2020. Retrieved 8 August 2020.
  • "Overview of Greenhouse Gases". U.S. Environmental Protection Agency. 11 April 2024. Archived from the original on 9 October 2024. Retrieved 15 September 2020.
• EUobserver
  • "Copenhagen failure 'disappointing', 'shameful'". EUobserver. 20 December 2009. Archived from the original on 12 April 2019. Retrieved 12 April 2019.
• European Parliament
  • Ciucci, M. (February 2020). "Renewable Energy". European Parliament. Retrieved 3 June 2020.
• The Guardian
  • Carrington, Damian (19 March 2019). "School climate strikes: 1.4 million people took part, say campaigners". The Guardian. Archived from the original on 20 March 2019. Retrieved 12 April 2019.
  • Rankin, Jennifer (28 November 2019). "'Our house is on fire': EU parliament declares climate emergency". The Guardian. ISSN 0261-3077. Retrieved 28 November 2019.
  • Watts, Jonathan (19 February 2020). "Oil and gas firms 'have had far worse climate impact than thought'". The Guardian.
  • McCurry, Justin (28 October 2020). "South Korea vows to go carbon neutral by 2050 to fight climate emergency". The Guardian. Retrieved 6 December 2020.
• International Energy Agency
  • "Projected Costs of Generating Electricity 2020". IEA. 9 December 2020. Retrieved 4 April 2022.
• NASA
  • "Arctic amplification". NASA. 2013. Archived from the original on 31 July 2018.
  • Conway, Erik M. (5 December 2008). "What's in a Name? Global Warming vs. Climate Change". NASA. Archived from the original on 9 August 2010.
  • Shaftel, Holly (January 2016). "What's in a name? Weather, global warming and climate change". NASA Climate Change: Vital Signs of the Planet. Archived from the original on 28 September 2018. Retrieved 12 October 2018.
  • Shaftel, Holly; Jackson, Randal; Callery, Susan; Bailey, Daniel, eds. (7 July 2020). "Overview: Weather, Global Warming and Climate Change". Climate Change: Vital Signs of the Planet. Retrieved 14 July 2020.
• National Conference of State Legislators
  • "State Renewable Portfolio Standards and Goals". National Conference of State Legislators. 17 April 2020. Retrieved 3 June 2020.
• National Geographic
  • Welch, Craig (13 August 2019). "Arctic permafrost is thawing fast. That affects us all". National Geographic. Archived from the original on 14 August 2019. Retrieved 25 August 2019.
• National Science Digital Library
  • Fleming, James R. (17 March 2008). "Climate Change and Anthropogenic Greenhouse Warming: A Selection of Key Articles, 1824–1995, with Interpretive Essays". National Science Digital Library Project Archive PALE:ClassicArticles. Retrieved 7 October 2019.
• Natural Resources Defense Council
  • "What Is the Clean Power Plan?". Natural Resources Defense Council. 29 September 2017. Retrieved 3 August 2020.
• The New York Times
  • Rudd, Kevin (25 May 2015). "Paris Can't Be Another Copenhagen". The New York Times. Archived from the original on 3 February 2018. Retrieved 26 May 2015.
• NOAA
  • NOAA (10 July 2011). "Polar Opposites: the Arctic and Antarctic". Archived from the original on 22 February 2019. Retrieved 20 February 2019.
  • Huddleston, Amara (17 July 2019). "Happy 200th birthday to Eunice Foote, hidden climate science pioneer". NOAA Climate.gov. Retrieved 8 October 2019.
• Our World in Data
  • Ritchie, Hannah; Roser, Max (15 January 2018). "Land Use". Our World in Data. Retrieved 1 December 2019.
  • Ritchie, Hannah (18 September 2020). "Sector by sector: where do global greenhouse gas emissions come from?". Our World in Data. Retrieved 28 October 2020.
  • Roser, Max (2022). "Why did renewables become so cheap so fast?". Our World in Data. Retrieved 4 April 2022.
• Pew Research Center
  • Fagan, Moira; Huang, Christine (16 October 2020). "Many globally are as concerned about climate change as about the spread of infectious diseases". Pew Research Center. Retrieved 19 August 2021.
• Politico
  • Tamma, Paola; Schaart, Eline; Gurzu, Anca (11 December 2019). "Europe's Green Deal plan unveiled". Politico. Retrieved 29 December 2019.
• RIVM
  • Documentary Sea Blind (Dutch Television) (in Dutch). RIVM: Netherlands National Institute for Public Health and the Environment. 11 October 2016. Archived from the original on 17 August 2018. Retrieved 26 February 2019.
• Salon
  • Leopold, Evelyn (25 September 2019). "How leaders planned to avert climate catastrophe at the UN (while Trump hung out in the basement)". Salon. Retrieved 20 November 2019.
• ScienceBlogs
  • Gleick, Peter (7 January 2017). "Statements on Climate Change from Major Scientific Academies, Societies, and Associations (January 2017 update)". ScienceBlogs. Retrieved 2 April 2020.
• Scientific American
  • Ogburn, Stephanie Paige (29 April 2014). "Indian Monsoons Are Becoming More Extreme". Scientific American. Archived from the original on 22 June 2018.
• Smithsonian
  • Wing, Scott L. (29 June 2016). "Studying the Climate of the Past Is Essential for Preparing for Today's Rapidly Changing Climate". Smithsonian. Retrieved 8 November 2019.
• The Sustainability Consortium
  • "One-Fourth of Global Forest Loss Permanent: Deforestation Is Not Slowing Down". The Sustainability Consortium. 13 September 2018. Retrieved 1 December 2019.
• UNFCCC
  • "What are United Nations Climate Change Conferences?". UNFCCC. Archived from the original on 12 May 2019. Retrieved 12 May 2019.
  • "What is the United Nations Framework Convention on Climate Change?". UNFCCC.
• Union of Concerned Scientists
  • "Carbon Pricing 101". Union of Concerned Scientists. 8 January 2017. Retrieved 15 May 2020.
• Vice
  • Segalov, Michael (2 May 2019). "The UK Has Declared a Climate Emergency: What Now?". Vice. Retrieved 30 June 2019.
• The Verge
  • Calma, Justine (27 December 2019). "2019 was the year of 'climate emergency' declarations". The Verge. Retrieved 28 March 2020.
• Vox
  • Roberts, D. (20 September 2019). "Getting to 100% renewables requires cheap energy storage. But how cheap?". Vox. Retrieved 28 May 2020.
• World Health Organization
  • "We must fight one of the world's biggest health threats: climate change". World Health Organization. 3 November 2023. Retrieved 19 September 2024.
• World Resources Institute
  • Levin, Kelly (8 August 2019). "How Effective Is Land At Removing Carbon Pollution? The IPCC Weighs In". World Resources institute. Retrieved 15 May 2020.
  • Seymour, Frances; Gibbs, David (8 December 2019). "Forests in the IPCC Special Report on Land Use: 7 Things to Know". World Resources Institute.
• Yale Climate Connections
  • Peach, Sara (2 November 2010). "Yale Researcher Anthony Leiserowitz on Studying, Communicating with American Public". Yale Climate Connections. Archived from the original on 7 February 2019. Retrieved 30 July 2018.

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v t e Climate change
Overview Causes of climate change Effects of climate change Climate change mitigation Climate change adaptation By country and region
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v t e Human impact on the environment
General	Anthropocene Ecological footprint Environmental impact assessment Environmental issues list of issues Human impact on marine life List of global issues Impact assessment Planetary boundaries Social ecology (ethics)
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