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:
“Man hath still either toys or care:
But hath no root, nor to one place is tied,
But ever restless and irregular,
About this earth doth run and ride.
He knows he hath a home, but scarce knows where;
He says it is so far,
That he has quite forgot how to go there.”
—Henry Vaughan (1622–1695)
“Fit gravefellows you are for Lincoln, Brown
And Douglass and Toussaint. . . all whose rapt eyes
Fashioned a new world in this wilderness.
American earth is richer for your bones;
Our hearts beat prouder for the blood we inherit.”
—Dudley Randall (b. 1914)
“made of earth and sea
His overcoat for ever,
And wears the turning globe.”
—A.E. (Alfred Edward)