Always has been and will be best alternative option....
U.S. Game Changing Renewable - Geothermal Power. Note that the preponderance of the nation's geothermal potential is in the Rocky Mountain States and the Intermountain West. The American Redoubt just keeps looking better....
http://oilprice.com/Alternative-Energy/Geothermal-Energy/U.S.-Game-Changing-Renewable-Geothermal-Power.html