A climate roadmap for President Trump

This week, President Trump is likely getting an earful in Paris over his extrication of the U.S. from the Paris climate agreement earlier this year. But our withdrawal will be meaningless unless he follows up with two important actions before he leaves office.

First, the administration must vacate the Environmental Protection Agency’s 2009 “Endangerment Finding” from carbon dioxide. Under the 2007 Supreme Court case Massachusetts v. EPA, this finding is required for the Agency to regulate carbon dioxide emissions under the Clean Air Act. No finding, no policy.