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:
“My darling girl, Unfortunately this earth is not ... a fairy- land, but a struggle for life, perfectly natural and therefore extremely harsh. All the same, or precisely for this reason, it is happiness and comfort for us men to have a precious sweetheart—and I have the most precious, the dearest and best of all!”
—Martin Bormann (1900–1945)
“In days gone by, we were afraid of dying in dishonor or a state of sin. Nowadays, we are afraid of dying fools. Now the fact is that there is no Extreme Unction to absolve us of foolishness. We endure it here on earth as subjective eternity.”
—Jean Baudrillard (b. 1929)
“It snowed in spring on earth so dry and warm
The flakes could find no landing place to form.”
—Robert Frost (1874–1963)