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April 2, 2013

James Hansen: 46 Years of Science and Courage

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Dr. James Hansen, the top climate scientist in the US has just announced his retirement from NASA.

He's been one of the best advocates a planet could ask for — he even gave us our name when he wrote that 350 parts per million is the safe level of CO2 in the atmosphere. 

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If you're on Facebook, please SHARE this image to thank him for his work. 

And then submit a comment to stop Keystone XL in his honor. 

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