Compared to solar and wind, geothermal energy is still a small fraction of the renewable energy market. It's holding its own, however, and it's likely to become a much bigger player in the not-so-distant future. "The resource is enormous," said Karl Gawell, executive director of the Geothermal Energy Association. "We're looking for how to solve our energy problems, and this is a huge resource we're only starting to tap." Geothermal energy is based on a primary fact about the earth: It's hot at the core. The farther you drill down, the hotter things get.
e-Commerce Times