“Moving away from the kind of monomania that says, ‘The only thing we can do is cut emissions,’ or the more narrow version, which says, ‘The only thing we can do is renewables,’ I think may actually secure broader political agreement to deal with the problem. People might be more willing to spend the big money to cut emissions as part of a project that, overall, wasn’t going to just limit the damage but was actually going to make the world better.”