The United States still gets most of its energy by setting millions of tiny fires everywhere. Cars, trucks, homes, and factories all burn fossil fuels in countless engines, furnaces, and boilers, creating pollution that heats the planet. To tackle climate change, those machines will need to stop polluting. And the best way to do that, experts increasingly say, is to replace them with electric versions — cars, heating systems and factories that run on clean sources of electricity like wind, solar or nuclear power.
