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:
“Old age cannot be cured. An epoch or a civilization cannot be prevented from breathing its last. A natural process that happens to all flesh and all human manifestations cannot be arrested. You can only wring your hands and utter a beautiful swan song.”
—Renee Winegarten (b. 1922)
“One is absolutely sickened, not by the crimes that the wicked have committed, but by the punishments that the good have inflicted; and a community is infinitely more brutalised by the habitual employment of punishment than it is by the occasional occurrence of crime.”
—Oscar Wilde (1854–1900)