Gas stoves are a leading source of hazardous indoor air pollution, but they emit only a tiny share of the greenhouse gases that warm the climate. Why, then, have they assumed such a heated role in climate politics? This skirmish may seem like a tempest in a teapot, but it reveals important contours of the battlefield on which climate politics are waged. As I explain in my book, “gas stoves matter to climate and to the gas industry because they serve as gateway appliances to the dominant residential uses of natural gas: heating and hot water. Installing more-efficient furnaces, better...