An Environmental Protection Agency exhibit at the Ronald Reagan Building. (Melina Mara/The Washington Post) Scott Pruitt has repeated a particular line again and again since becoming the head of the Environmental Protection Agency. “The future ain’t what it used to be at the EPA,” he’s fond of saying . As it turns out, the past may not be what it once was, either. In an obscure corner of the Ronald Reagan International Trade Building, a debate is underway about how to tell the story of the EPA’s history and mission. A miniature museum that began as a pet project of former EPA administrator Gina McCarthy has come under scrutiny. It features the agency’s work over 4½ decades, with exhibits topics such as regulating carbon dioxide emissions and the Paris climate accord. The Obama administration championed such efforts, but President Trump’s policies are at odds with them. Now the museum, […]