You Are Stealing Our Future: Greta Thunberg, 15, Condemns the World’s Inaction on Climate Change; A “Conference of Polluters”: How Fossil Fuel Companies Are Shaping Policy at the U.N. Climate Summit; Fossil-Free Costa Rica: How One Country Is Pursuing Decarbonization Despite Global Inaction; As U.N. Calls for Urgent Action on Climate Change, U.S. Seeks to Dilute Pact to Cut Carbon Emissions.