The U.S. is now officially leaving the Paris climate accord: What’s next?
And how quickly can we get back in?
On November 4, the Trump administration formally notified the United Nations that it planned to withdraw the U.S. from the Paris Agreement on climate change, which 196 countries adopted in 2015. The pact is designed to keep global temperatures from rising more than 2 degrees Celsius above pre-industrial levels in this century, and if possible, to limit the increase to 1.5°C. Boston University international relations scholar Henrik Selin explains how U.S. withdrawal will affect the prospects for avoiding the worst effects of global warming.