Video PlayerClose
Luis Alfonso de Alba (C, front), the United Nations secretary-general's special envoy for the 2019 Climate Summit, speaks at a joint briefing at the UN headquarters in New York, Feb. 14, 2019. (Xinhua/Li Muzi)
Luis Alfonso de Alba (C, front), the United Nations secretary-general's special envoy for the 2019 Climate Summit, speaks at a joint briefing at the UN headquarters in New York, Feb. 14, 2019. (Xinhua/Li Muzi)