President Trump is to announce today whether he’ll withdraw the United States from the Paris climate agreement. What would it mean for the biggest carbon polluter in history to abandon the most ambitious effort to fight climate change? Guests: Justin Gillis, who covers the science and policy implications of climate change; Max Fisher and Amanda Taub, who write the Interpreter column. For more information on today’s episode, visit http://nyti.ms/2qIOb7K.