Geothermal Energy has been a clean source of power for homes but it has, so far, been accessible only to the very wealthy because of its cost. The equipment has been expensive and the amount of energy that could be extracted from the earth meagre. However, this turned out to be something that fashionable anvironmentally conscious types instaleld in their homes in the swankier parts of the Northeast or on the West Coast of the USA. Now comes a breakthrough that promises to work efficiently at lower temperatures underground: http://www.rasertech.com/index.html Rasertech's website has several videos talking about their technology and about the plant that they are currently building in New Mexico.
Yes, this is yet another technology that I would love to see available in more places. Nothing beats showing fossil fuel the fist!