In order for electric vehicles
to make any actual impact on greenhouse gas emissions, a great deal of progress will need to be made on renewable sources of power generation. Wind power generation has been expanding rapidly, and solar is growing in some areas. Another source with huge potential is geothermal. If the natural heat energy held within the planet can be tapped, it could be almost limitless. That's easier said than done in most places but there are some areas where it could be very practical. The U.S. Department of the Interior has decided to offer up leases
for geothermal development on 190 million acres of Federal land. It's estimated that up to 5,540 megawatts of power could be generated from these lands by the middle of the next decade. That could increase to 12,100 megawatts by 2025. The available lands for development will not include any national parks or wilderness areas.