ScienceRocks
Democrat all the way!
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![ice_core_co2.png](/proxy.php?image=http%3A%2F%2Fwww.geo.cornell.edu%2Feas%2Fenergy%2F_Media%2Fice_core_co2.png&hash=62f48c093add72cbe708c8bcc8468f0e)
http://www.geo.cornell.edu/eas/energy/_Media/ice_core_co2.png
For most of the past 800,000 years the co2 within our atmosphere was 180-280ppm. Only one period around 315,000 years ago did we make it to 300ppm.
It has been 3 MILLION years since we had a year with 400ppm.
Ice-Free Arctic in Pliocene, Last Time CO2 Levels above 400 PPM: Scientific American
![CO2-chart-780-600x412.jpg](/proxy.php?image=http%3A%2F%2Fblogs.ei.columbia.edu%2Fwp-content%2Fuploads%2F2013%2F06%2FCO2-chart-780-600x412.jpg&hash=6a2637d867fc51f1914a9c35d5f7c99c)
The last time we were over 550 ppm that we will likely see by 2100...Around 10-15 million years ago.
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