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CO2 levels at highest for 3 million years: The last time CO2 levels were this high, Greenland was mostly green, sea levels were up to 20 meters higher and trees grew on Antarctica

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CO2 levels at highest for 3 million years: The last time CO2 levels were this high, Greenland was mostly green, sea levels were up to 20 meters higher and trees grew on Antarctica
    submitted by /u/maxwellhill
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    from World News http://bit.ly/2uSAWAO

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