Wind is also a great source of energy but is having a hard time getting past certain groups. Studies have been done that show there is enough wind energy within the U.S. to create more than enough energy to power our country.
As far as the electric car goes, I agree with Eric. Not enough people showed interest to make it successful and I don't think there ever will be. Electric cars could be a success in urban areas, perhaps sold by rental car companies. But as a normal, day-in-day-out vehicle, they aren't viable at this point in time.