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:
“No Vice or Wickedness, which People fall into from Indulgence to Desires which are natural to all, ought to place them below the Compassion of the virtuous Part of the World; which indeed often makes me a little apt to suspect the Sincerity of their Virtue, who are too warmly provoked at other Peoples personal Sins.”
—Richard Steele (1672–1729)
“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)