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:
“You mean that this little pebble’s been out there hot-roddin’ around the universe?”
—Theodore Simonson. Irvin S. Yeaworth, Jr.. Mooch, The Blob, examining the “meteor” that carried the Blob to earth (1958)
“But money, wife, is the true Fuller’s Earth for reputations, there is not a spot or a stain but what it can take out.”
—John Gay (1685–1732)
“It snowed in spring on earth so dry and warm
The flakes could find no landing place to form.”
—Robert Frost (1874–1963)