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:
“Now Morn her rosy steps in th’ eastern clime
Advancing, sowed the earth with orient pearl.”
—John Milton (1608–1674)
“Let him not quit his belief that a popgun is a popgun, though the ancient and honorable of the earth affirm it to be the crack of doom.”
—Ralph Waldo Emerson (1803–1882)
“Where are these men? Asleep beneath their grounds:
And strangers, fond as they, their furrows plough.
Earth laughs in flowers, to see her boastful boys
Earth-proud, proud of the earth which is not theirs.”
—Ralph Waldo Emerson (1803–1882)