When most of us think of global warming, we think of chilling magazine headlines, prestigious scientists endlessly arguing far above our heads, and endless policy debates focused on the supposedly incompatible goals of protecting the climate we depend on and the economy in which we live. We hear a lot about the end of the world, high-tech solutions that are always just another five years from being feasible on a massive scale, and encouragements to change our light bulbs and buy a Prius.