Geothermal energy is energy in the form of sensible heat that originates within the earth’s crust and makes its way to the surface by conduction. Heat may be conducted upward through solid rocks or carried upwa
rd by circulating ground water that is heated at depth and makes its return to the surface. Geothermal activities are in general associated with igneous activities.
At some geothermal localities the ground water reached the surface as hot springs, fumarole
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activity and radioactive decays belo