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:
“I took him for the plainest harmless creature
That breathed upon the earth a Christian;
Made him my book, wherein my soul recorded
The history of all her secret thoughts.”
—William Shakespeare (1564–1616)
“Let Rome in Tiber melt and the wide arch
Of the ranged empire fall! Here is my space.
Kingdoms are clay; our dungy earth alike
Feeds beast as man. The nobleness of life
Is to do thus; when such a mutual pair
And such a twain can do ‘t, in which I bind,
On pain of punishment, the world to weet
We stand up peerless.”
—William Shakespeare (1564–1616)
“If the sky stands still, if the earth quakes, if there is famine, if there is pestilence, at once the cry is raised: Throw the Christians to the lions! So many to one?”
—Tertullian (c. 150–230)