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:
“We have in the service the scum of the earth as common soldiers.”
—Arthur Wellesley, 1st Duke Wellington (1769–1852)
“Though much is taken, much abides; and though
We are not now that strength which in old days
Moved earth and heaven, that which we are, we are—
One equal temper of heroic hearts,
Made weak by time and fate, but strong in will
To strive, to seek, to find, and not to yield.”
—Alfred Tennyson (1809–1892)
“O my true love, hold me.
In your every inch and glance is the globe of genesis spun,
And the living earth your sons.”
—Dylan Thomas (1914–1953)