But what we do know is that the only way to find out is to get out there and try to make it work. Return to contents list. The definition of an Earthpower is not so straightforward. Internal radioactive decay heats the Earth's interior and drives geological processes such as volcanoes and continental drift, before again eventually escaping to space as waste heat. The purpose of the Absorbed Earthpower will be to make comparisons between the energy input by the Sun and that input by human industrial activities on the Earth.
Geothermal power appears to be relatively small.
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