Sheldon Whitehouse @SenWhitehouse
800,000 years --> CO2 atmosphere levels were between 170-300ppm. 2013 --> We broke 400ppm. #ActonClimate — PolitiTweet.org
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Wed Nov 13 21:18:52 +0000 2013
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Sheldon Whitehouse @SenWhitehouse
800,000 years --> CO2 atmosphere levels were between 170-300ppm. 2013 --> We broke 400ppm. #ActonClimate — PolitiTweet.org