Natural Occurrence
Naturally occurring decay heat is a significant source of the heat in the interior of the Earth. Radioactive isotopes of uranium, thorium and potassium are the primary contributors to this decay heat, and this Radioactive decay is the primary source of heat from which Geothermal energy derives.
Read more about this topic: Decay Heat
Famous quotes containing the words natural and/or occurrence:
“When human beings have been fascinated by the contemplation of their own hearts, the more intricate biological pattern of the female has become a model for the artist, the mystic, and the saint. When mankind turns instead to what can be done, altered, built, invented, in the outer world, all natural properties of men, animals, or metals become handicaps to be altered rather than clues to be followed.”
—Margaret Mead (1901–1978)
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—Oscar Wilde (1854–1900)