Bill McKibben and Elizabeth Kolbert join David Remnick to talk about the twin crises of our time: the coronavirus pandemic and the climate emergency. During the COVID-19 national emergency, the Trump Administration has loosened auto-emissions standards, and has proposed easing the controls on mercury released by power plants, among other actions. With protesters no longer able to gather, construction on the controversial Keystone Pipeline has resumed. Still, McKibben and Kolbert believe that the pandemic could remind the public to take scientific fact seriously, and possibly might change our values for the better. Plus: Carolyn Kormann speaks with a disease ecologist who hunts for coronaviruses and other deadly pathogens in the bat caves where they originate.