UN Secretary-General Ban Ki-moon 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)
UN Secretary-General Ban Ki-moon 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)