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Revision history of "File:Carbon dioxide 800k.png"

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  • (cur | prev) 08:55, 5 May 2010 Pile (Talk | contribs) (494 bytes) (Air bubbles trapped in Antarctic ice preserve an 800,000-year record of atmospheric carbon dioxide levels, which naturally varied from about 180 to about 280 parts per million. Once humans began burning large quantities of coal and oil in the 19th century)
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