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Atmospheric CO2 - January 1959 to January 2015 - Mauna Loa ObservatoryAtmospheric CO2: January 1959 to January 2015
Mauna Loa Observatory – Scripps Institution of Oceanography
Source: CO2Now

 

Keeping Track of the Earth’s Atmospheric CO2

“If humanity wishes to preserve a planet similar to that on which civilization developed and to which life on Earth is adapted, paleoclimate evidence and ongoing climate change suggest that CO2 will need to be reduced … to at most 350 ppm.”
~ Dr. James Hansen, former NASA Climatologist

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