U.S. Secretary of State John Kerry (Front) addresses a High-level Event on the Entry into Force of the Paris Agreement at the UN headquarters in New York, on Sept. 21, 2016. (Xinhua/Li Muzi)
U.S. Secretary of State John Kerry (Front) addresses a High-level Event on the Entry into Force of the Paris Agreement at the UN headquarters in New York, on Sept. 21, 2016. (Xinhua/Li Muzi)