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  • snthsnth1 snthsnth1 Apr 23, 2013 2:33 PM Flag

    Today's CO2 Report - you have to go back 15 million years.

    In December 2009, a research team from UCLA published a paper in Science that suggested we would have to go back at least 15 million years to find carbon dioxide levels approaching today’s levels. This research used isotopic analysis of shells in deep sea sediments, and reported that CO2 concentrations may not have exceeded 400 parts per million since the Mid-Miocene Climatic Optimum (MMCO) — between 16 and 14 million years ago. The MMCO was associated with reduced planetary ice volumes and global sea levels 25 to 40 meters higher than today.

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