@Revkin tweets related to: Ramp Up, Hansen, Hume, Divide, Nasa

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After nearly half a century of research in planetary and climate science for NASA, James E. Hansen is retiring on Wednesday to pursue his passion for climate activism without the hindrances that come with government employment. Justin Gillis has filed a thorough look at Hansen's journey from climate scientist to impassioned carbon campaigner.
Andy Revkin Twitter

Jim Hansen officially crosses Hume's "is/ought divide," leaving NASA to ramp up CO2 campaign: http://t.co/YMqg9OPOzq #agw

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