The 'Kigali Amendment' agreed this weekend to control HFC gases thousands of times more powerful than CO2 is the first major step in delivering the goals of the Paris agreement, writes Nigel Paul - and a second huge success for the Montreal Protocol, originally agreed to save the ozone layer from destruction by CFCs.
Thirty years after the UN took action to save the ozone layer, we can count the benefits - which only begin with 2 million fewer cases of skin cancer a year, writes Nigel Paul. With world leaders taking on the much greater climate challenge today, we should take cheer, and inspiration, from that historic success.