Changes

:The current debates about global climate change are complicated by our not understanding the physics of the sun or of the earth’s atmosphere and oceans well enough to dismiss them as major causes of climate change on the earth. Dramatic climate changes like the [[medieval warm period]] at the time of the [[Viking]] settlements of [[Iceland]] and [[Greenland]] from about a.d. 900 to 1250, and the subsequent “little ice age,” from about 1250 to 1700, which led to extinction of the Greenland settlements, were certainly not caused by manmade changes in the concentration of [[carbon dioxide]] in the atmosphere. [http://media.hoover.org/documents/0817939326_27.pdf]

:The current debates about global climate change are complicated by our not understanding the physics of the sun or of the earth’s atmosphere and oceans well enough to dismiss them as major causes of climate change on the earth. Dramatic climate changes like the [[medieval warm period]] at the time of the [[Viking]] settlements of [[Iceland]] and [[Greenland]] from about a.d. 900 to 1250, and the subsequent “little ice age,” from about 1250 to 1700, which led to extinction of the Greenland settlements, were certainly not caused by manmade changes in the concentration of [[carbon dioxide]] in the atmosphere. [http://media.hoover.org/documents/0817939326_27.pdf]

See also:

==See also==

*[[anthropogenic global warming]]

*[[anthropogenic global warming]]