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Published on Jul 2, 2013
Ralph Keeling, geochemistry professor at Scripps Institution of Oceanography, UC San Diego, talks about the @keeling_curve and a historic climate milestone: the carbon dioxide concentration in our atmosphere recently exceeded 400 ppm for the first time in human history. Dr. Keeling explains the consequences of this, outlines solutions, and addresses why time is of the essence. Produced by Scripps Institution of Oceanography, UC San Diego. More info: keelingcurve.ucsd.edu.