Kigali deal on HFCs is big step in fighting climate change

The deal done in Rwanda on Saturday will cut greenhouse gases. We assess its global significanceThey went to Kigali to eliminate hydrofluorocarbons (HFCs) and take 0.5C out of future global warming, and the 170 countries that successfully negotiated an amendment to the Montreal protocol treaty agreed to get rid of 90% of them. Not bad for four days and three long nights of hard work.The Kigali deal on HFCs is in fact fiendishly complicated and has taken years to negotiate in various technical an