摘要
On Saturday September 3, 2016, on the eve of the G20 Summit in Hangzhou, China, the US, following earlier negotiations with China, agreed to join the Paris Agreement on climate change reached in December 2015 [1,2], joining the prior commitment made by China. In order to go into force, the agreement required ratification by 55 countries representing 55% of global emissions. With the agreement on the part of China and the US, representing together 38% of global emissions, obstacles on the path to ratification were markedly reduced. Indeed, on November 4 the required ratifications were reached in order to put the agreement in force 131.
