Environmentalists don’t vote. At least not nearly as much as the general population. They have a turnout problem. By Nathaniel Stinnett’s estimate, 10.1 million registered voters who consider climate change or the environment as one of their top two priorities, sat out the 2016 presidential election. An even larger number stayed home for the 2014 midterms. But for Stinnett, those big numbers mean a big opportunity. Right now, his Environmental Voter Project is targeting 2.4 million environmentalists in Georgia, Florida, Colorado, Massachusetts, Nevada, and Pennsylvania – registered voters who are considered unlikely to vote. Stinnett employs an unusual messaging strategy to get them to the polls– which he explains in our conversation. If he succeeds, he believes no candidate will be able to get their name on a ballot without talking about the environment.