December 18, 2012

December 17, 2012

September 14, 2012

August 24, 2012

August 23, 2012

July 26, 2012

June 13, 2012

June 12, 2012

June 02, 2012

May 02, 2012

April 23, 2012

March 19, 2012

March 08, 2012

January 05, 2012

December 15, 2011

November 14, 2011

November 03, 2011

October 10, 2011

October 08, 2011

September 09, 2011

Current CO2 level in the atmosphere

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