Geoscientists map changes in atmospheric CO2

<p>An international consortium of geoscientists has reconstructed atmosphereric levels of CO2 going back 66 million years using proxies in the geoloogical record. Today&#39;s concenteration, 420 parts per million, is higher than it&#39;s ever been in 14 million years.</p>

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William Anderegg ,Thure Cerling ,Dustin Harper ,Gabe Bowen ,Columbia University ,U Wilkes Center ,University Of Utah ,Method Of Research ,Release Until ,Time Thursday ,Integration Project ,Industrial Revolution When ,Wilkes Center ,