http://davidsellers.com/glensfallsheating
What is Geothermal Heating? Humans have been using geothermal power for heating purposes for centuries. This specific type of energy has been contained within the heat that lies in the core of the earth since the planet was formed. The heat comes from radioactive decay of minerals as well as from solar energy that is absorbed at the earths surface. Humans have figured out how to harvest this energy and put it to use in the form of heating. Typically, the heat is harvested near tectonic plate boundaries. In these regions, the ground as well as groundwater display temperatures higher than the target output.
