Why 383ppm?

01/01/2008 § Leave a Comment

Atmospheric CO2 concentrations have been measured at Mauna Loa in Hawaii since 1958. It’s the longest continuous record of this type anywhere in the world. During this time they have risen from 316 parts per million (ppm) in 1959 to 383ppm (382.94) in 2007. 383ppm represents the concentration in the year the we were set up.

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