As part of our ongoing program of educating home owners about the latest green building techniques and technology, here's an overview of the environmental and financial benefits of geothermal systems. They utilize a special pump and underground circulating process to access the heat stored several feet below the earths' surface. In the winter, the earth's heat is drawn into your home, and in summer, the system cools things down by returning your home's higher temperatures back to the earth.  <More info>