It’s easy to point out which tactics won’t work to get American conservatives engaged in the fight against climate change. Recently I’ve critiqued arguments that climate hawks should extend a welcoming hand to right-wingers and that Pope Francis’s climate change encyclical will move any Republicans to embrace the issue. But merely knocking down others’ arguments is insufficient when they are trying to solve a real problem. And this problem is quite real: In order to pass comprehensive climate change legislation federally — and to get the right policies also working in tandem at the state and local levels — some...