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:
“The earth is the earth as a peasant sees it, the world is the world as a duchess sees it, and anyway a duchess would be nothing if the earth was not there as the peasant sees it.”
—Gertrude Stein (1874–1946)
“The earth is not earth but a stone,
Not the mother that held men as they fell
But stone, but like a stone, no: not
The mother, but an oppressor, but like
An oppressor that grudges them their death,
As it grudges the living that they live.”
—Wallace Stevens (1879–1955)
“Illiterate him, I say, quite from your memory.... There is nothing on earth so easy as to forget, if a person chooses to set about it. I’m sure I have as much forgot your poor, dear uncle, as if he had never existed—and I thought it my duty to do so.”
—Richard Brinsley Sheridan (1751–1816)