Thursday, August 28, 2008

1850/ CO2

The total warming from 1850 to the present has been 0.7 degrees C—but 0.5 degrees of the warming occurred before 1940. Eighty 80 percent of humanity’s greenhouse gases emissions came after that date.

The earth’s net global warming since 1940, moreover, has been a barely-measurable 0.2 degrees C—over 70 years. During this time the climate forcing power of CO2 molecules has been declining logarithmically, to the point where soon additional CO2 won’t make any further climate impact.

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