Scores of world leaders gathered in New York on Monday for the U.N. Climate Action Summit, but the world’s largest greenhouse gas emitters announced few new measures to address the climate crisis. President Trump and Vice President Mike Pence briefly attended the summit but left after just 14 minutes. At the beginning of the summit, 16-year-old Swedish climate activist Greta Thunberg delivered an impassioned address to world leaders, explicitly naming their inaction on the climate crisis. Youth climate activists from around the world also spoke at UNICEF about a landmark new climate complaint they filed with the United Nations Committee on the Rights of the Child. Finally, we speak with Chief Raoni Metuktire of the Kayapó tribe, who traveled to New York to protest deforestation of the Amazon under Brazilian President Jair Bolsonaro.