Today is the first day of COP22 , the twenty second annual meeting of international climate change negotiators. This year’s conference is like none of the previous ones, because – this time – there’s an international climate agreement in effect. The Paris Agreement entered into force last Friday, November 4 th . That agreement has the support of all 195 negotiating parties, and has already been ratified by one hundred parties , accounting for nearly seventy percent of global greenhouse gas