Earth
See also: Runaway climate changeEarth's climate has swung repeatedly between warm periods and ice ages during its history. In the current climate the gain of the positive feedback effect from increased atmospheric water vapor is well below that which is required to boil away the oceans. Climate scientist John Houghton has written that " is no possibility of runaway greenhouse conditions occurring on the Earth". However, climatologist James Hansen disagrees. In his Storms of My Grandchildren he says that burning coal and mining shale oil will result in runaway greenhouse on Earth.
Benton and Twitchett's have a different definition of a runaway greenhouse; events meeting this definition have been suggested as a cause for the Paleocene-Eocene Thermal Maximum and the great dying.
Read more about this topic: Runaway Greenhouse Effect
Famous quotes containing the word earth:
“In short, I am convinced, both by faith and experience, that to maintain one’s self on this earth is not a hardship but a pastime, if we will live simply and wisely; as the pursuits of the simpler nations are still the sports of the more artificial. It is not necessary that a man should earn his living by the sweat of his brow, unless he sweats easier than I do.”
—Henry David Thoreau (1817–1862)
“A good businessman never makes a contract unless he’s sure he can carry it through, yet every fool on earth is perfectly willing to sign a marriage contract without considering whether he can live up to it or not.”
—Dalton Trumbo (1905–1976)
“There is not much sense in suffering, since drugs can be given for pain, itching, and other discomforts. The belief has long died that suffering here on earth will be rewarded in heaven. Suffering has lost its meaning.”
—Elisabeth Kübler-Ross (b. 1926)