Submitted by Eric Bram, Mar 22, 2007 09:47

Calling carbon dioxide "a prime greenhouse gas" is misleading unless you also mention that it accounts for only about 3.5% of the greenhouse effect in Earth's atmosphere. Water vapor accounts for about 95%. Anthropogenic (man-made) carbon dioxide accounts for only about one tenth of one percent of Earth's greenhouse effect.

Source: http://www.geocraft.com/WVFossils/greenhouse_data.html

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