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Hydrofluorocarbons (HFCs), organic compounds that contain fluorine and hydrogen atoms, are the most common type of organofluorine compounds. They are commonly used in air conditioning and as refrigerants in place of the older chlorofluorocarbons such as R-12 and hydrochlorofluorocarbons such as R-21. They do not harm the ozone layer as much as the compounds they replace; however, they do contribute to global warming. Their atmospheric concentrations and contribution to anthropogenic greenhouse gas emissions are rapidly increasing, causing international concern about their radiative forcing.

Other Direct Greenhouse Gases - HFCs GHG online

Hydrofluorocarbons or 'HFCs' have been increasingly used in the last decade or so as an alternative to ozone damaging CFCs in refrigeration systems. Unfortunately, though they provide an effective alternative to CFCs, they can also be powerful greenhouse gases with long atmospheric lifetimes. The three main HFCs are HFC-23, HFC-134a and HFC152a, with HFC-134a being the most widely used refrigerant. Since 1990, when it was almost undetectable, concentrations of HFC-134a have risen massively. HFC-134a has an atmospheric lifetime of about 14 years and its abundance is expected to continue to rise in line with its increasing use as a refrigerant around the world.

HFCs: A Critical Link in Protecting Climate and the Ozone Layer: A UNEP Synthesis Report United Nations Environment Programme (UNEP); Nov 2011

2016 Montreal Protocol Amendment

World Leaders Agree to Phase Out Heat-Trapping Hydrofluorocarbons Jean Chemnick, ClimateWire; Scientific American; 17 Oct 2016

U.S. and China lead the way to preventing half-a-degree Celsius rise in global warming

The world just took another huge step forward on fighting climate change Chris Mooney; Washington Post; 15 Oct 2016

this week ... close to 200 countries adopted an amendment to the 1987 Montreal Protocol to phase down the use of hydrofluorocarbons, or HFCs, which are super-polluting, powerful greenhouse gases.

Climate change: 'Monumental' deal to cut HFCs, fastest growing greenhouse gases Matt McGrath; BBC; 15 Oct 2016

More than 150 countries have reached a deal described as "monumental" to phase out gases that are making global warming worse.

Hydrofluorocarbons (HFCs) are widely used in fridges, air conditioning and aerosol sprays. Delegates meeting in Rwanda accepted a complex amendment to the Montreal Protocol that will see richer countries cut back their HFC use from 2019. But some critics say the compromise may have less impact than expected.

US Senate could block landmark HFC climate treaty, legal experts warn John Upton; The Guardian; 18 Oct 2016

The jubilation and relief that flowed from United Nations climate talks in Rwanda over the weekend may be short-lived in the U.S., where legal experts say the agreement risks being blocked by Republican senators.

Appliance Makers Try to Keep Their Cool as Rules Change on Refrigerants ANDREW TANGEL, TED MANN; Wall St Journal; 17 Oct 2016

A global pact to limit planet-warming emissions is likely to force manufacturers of air conditioners and refrigerators to consider passing the additional cost of alternative coolants to consumers.