Travel back in time 800,000 years in three minutes….

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This short video produced by scientists at NOAA, the US Government Agency that monitors atmospheric levels of carbon dioxide, the main greenhouse gas by volume, takes you on a journey through time.

It starts with the recent history of carbon dioxide levels in the atmosphere then takes you back to the ice age.  Watch it in here: http://www.esrl.noaa.gov/gmd/ccgg/trends/history.html