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Wednesday, May 8, 2013

Carbon-dioxide levels are at their highest point in at least 800,000 years

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/

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