Carbon-dioxide levels are at their highest point in at least 800,000 years - The Washington Post - discu.eu

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Carbon-dioxide levels are at their highest point in at least 800,000 years http://www.washingtonpost.com/blogs/wonkblog/wp/2013/05/08/carbon-dioxide-levels-are-at-their-highest-point-in-at-least-800000-years/?wprss=rss_ezra-klein 103 comments 8/5/2013 science

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https://keelingcurve.ucsd.edu/ 9 comments
A Scientist, His Work and a Climate Reckoning - The New York Times http://www.nytimes.com/2010/12/22/science/earth/22carbon.html?pagewanted=all 0 comments

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