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:
“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)
“Married love is a stream that, after a certain length of time, sinks into the earth and flows underground. Something is there, but one does not know what. Only the vegetation shows that there is still water.”
—Gerald Branan (1894–1987)