epa07859322 Sixteen-year-old climate activist Greta Thunberg (2-R) speaks as United Nations Secretary-General Antonio Guterres (3-L) and other young climate activist listen at the start of the United Nations Youth Climate Summit which is taking place in advance of the General Debate of the General Assembly of the United Nations at United Nations Headquarters in New York, New York, USA, 21 September 2019. The event was organized by the United Nations to draw attention to young people from around the world who are calling on world leaders to take action on the issue of climate change. The General Debate of the 74th session of the UN General Assembly begins Tuesday, a day after a high-level meeting of world leaders on climate change.  EPA/JUSTIN LANE
Greta Thunberg, 16 and United Nations Secretary-General Antonio Guterres, 70 at the UN headquarters in New York in September. EPA

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