The word "geothermal" literally means earth plus heat. The earth is a wonderful source of energy and thermal energy is by far the more abundant resource. The thermal energy in the uppermost six miles of the Earth's crust amounts to 50,000 times the energy of all oil and gas resources in the world. The geothermal resources are the world's largest energy resource and have been used by people for centuries. In addition, it is environmentally friendly. It is a renewable resource and can be
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