World Leaders Gather For United Nations Climate Summit

NEW YORK, NY - SEPTEMBER 23: Co-Chair of the Global Commission on Adaptation Bill Gates arrives to speak at the United Nations (U.N.) Climate Action Summit at U.N. headquarters on September 23, 2019 in New York City. While the U.S. will not be participating in the day-long event, China and about 70 other countries are expected to make announcements concerning climate change. The summit at the U.N. comes after a worldwide Youth Climate Strike on Friday, which saw millions of young people around the world demanding action to address the climate crisis. (Photo by Drew Angerer/Getty Images)