The mug-shot posters, pasted on walls and lampposts around Paris by an activist group during the United Nations climate talks last year, were hardly flattering. They depicted Myron Ebell, a climate contrarian, as one of seven “climate criminals” wanted for “destroying our future.” But in his customary mild-mannered way, Mr. Ebell, who directs environmental and energy policy at the Competitive Enterprise Institute , a libertarian advocacy group in Washington, brushed it off. “I’ve gotten used to this over the years,” he told an interviewer at the talks. “But I did go out and get my photo taken with my poster, just so I have it as a memento.” In looking for someone to follow through on his campaign vow to dismantle one of the Obama administration’s signature climate change policies, President-elect Donald J. Trump probably could not have found a better candidate for the job than Mr. Ebell. Mr. […]