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Hydrofluorocarbon
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==Environmental regulation== Unlike other greenhouse gases in the [[Paris Agreement]], hydrofluorocarbons are included in other international negotiations.<ref>{{cite news |last=Davenport |first=Carol |date=23 July 2016 |title=A Sequel to the Paris Climate Accord Takes Shape in Vienna |url=https://www.nytimes.com/2016/07/24/world/europe/vienna-sequel-paris-climate-accord.html |newspaper=New York Times |access-date=17 August 2016}}</ref> In September 2016, the [[New York Declaration on Forests]] urged a global reduction in the use of HFCs.<ref name="ny-declaration-on-hfcs-2016"> {{cite web | title = The New York Declaration of the Coalition to Secure an Ambitious HFC Amendment | date = 22 September 2016 | publisher = US Department of State | location = Washington, DC | access-date = 22 September 2016 | url = https://2009-2017.state.gov/e/oes/rls/pr/2016/262236.htm }} </ref> On 15 October 2016, due to these chemicals' contribution to [[global warming|climate change]], negotiators from 197 nations meeting at a summit of the [[United Nations Environment Programme]] in Kigali, Rwanda reached a legally-binding accord (the [[Kigali Amendment]]) to phase down hydrofluorocarbons (HFCs) in an amendment to the [[Montreal Protocol]].<ref>{{cite web|url=https://www.theguardian.com/environment/2016/oct/15/climate-change-environmentalists-hail-deal-to-limit-use-of-hydrofluorocarbons |title=Climate change: global deal reached to limit use of hydrofluorocarbons |website=The Guardian |first1=Chris |last1=Johnston |first2=Oliver |last2=Milman |first3=John |last3=Vidal |date=15 October 2016 |access-date=15 October 2016}}</ref><ref>{{cite web|url =https://www.bbc.co.uk/news/science-environment-37665529 |title=Climate change: 'Monumental' deal to cut HFCs, fastest growing greenhouse gases |publisher=BBC News |date=15 October 2016 |access-date=15 October 2016}}</ref><ref>{{cite web|url =https://www.nytimes.com/2016/10/15/world/africa/kigali-deal-hfc-air-conditioners.html |title= Nations, Fighting Powerful Refrigerant That Warms Planet, Reach Landmark Deal |work=New York Times |date=15 October 2016 |access-date=15 October 2016}}</ref> As of February 2020, 16 U.S. states ban or are phasing down HFCs.<ref>[https://www.wbur.org/earthwhile/2020/02/18/massachusetts-planninghydrofluorocarbon-hfc-ban Baker Administration Planning Rule To Ban Hydrofluorocarbons]</ref> [[Coronavirus disease 2019|COVID-19]] relief legislation, which included a measure that would require chemical manufacturers to phase down the production and use of HFCs, was passed by the [[United States House of Representatives]] and [[United States Senate]] on December 21, 2020.<ref>{{Cite news|last=Davenport|first=Coral|date=2020-12-22|title=Congress included climate change legislation in its coronavirus relief deal.|language=en-US|work=The New York Times|url=https://www.nytimes.com/2020/12/22/us/congress-included-climate-change-legislation-in-its-coronavirus-relief-deal.html|access-date=2020-12-22|issn=0362-4331}}</ref> The U.S. Environmental Protection Agency signed a final rule phasing down HFCs on 23 September 2021.<ref>{{Cite news|title=Biden administration takes aim at climate warming gas|url=https://news.yahoo.com/biden-administration-takes-aim-climate-092027109.html|last=Volcovici|first=Valerie|date=2021-09-23|access-date=2021-09-23|work=[[Yahoo! News]]}}</ref>
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