It's a loaded question, but in general the answer is yes. Electric vehicles need to be recharged and must draw that electricity from somewhere else. If the electricity comes from a coal-burning power plant, the electric vehicle is still part of a pollution cycle even though it doesn't emit greenhouse gases itself. Even so, it's easier to control emissions on a single point of origin -- the power plant -- than it is on a fleet of vehicles on the road. And electric cars can also get electricity from renewable resources such as hydro-electric facilities or solar cells.