From the ArcaMax Publishing, Trivia Newsletter:
http://www.arcamax.com/news/trivia/s-366414-329544

How hot will CO2 make the earth?

If the amount of carbon dioxide in the atmosphere was doubled, the average temperature of the Earth would rise by 4 degrees Fahrenheit. Many forecasters expect carbon dioxide to double by the year 2025. The world would then be warmer than at any time in the last 100,000 years.

This news arrived on: 06/20/2008

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