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We're Jim Hansen, a professor at Columbia’s Earth Institute, and Paul Hearty, a professor at UNC-Wilmington, here to make the case for urgent action to reduce carbon dioxide emissions, which are on the verge of locking in highly undesirable consequences

Hi Reddit, I’m Jim Hansen, a professor at Columbia University’s Earth Institute.http://www.earthinstitute.columbia.edu/sections/view/9 I'm joined today by 3 colleagues who are scientists represen...

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