NEW YORK, NY - SEPTEMBER 23: Youth activist Greta Thunberg speaks at the Climate Action Summit at the United Nations on September 23, 2019 in New York City. While the United States will not be participating, 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 Stephanie Keith/Getty Images)
