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Last Time Carbon Dioxide Levels Were This High: 15 Million Years Ago

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avatar Last Time Carbon Dioxide Levels Were This High: 15 Million Years Ago
October 08, 2009 05:59PM
ScienceDaily (Oct. 8, 2009) — You would have to go back at least 15 million years to find carbon dioxide levels on Earth as high as they are today, a UCLA scientist and colleagues report Oct. 8 in the online edition of the journal Science.

http://www.sciencedaily.com/releases/2009/10/091008152242.htm
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