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CO2 Levels Reach and Maintain 400 PPM – A Dubious Milestone in Human History

May 29, 2014July 7, 2016Thomas Schueneman1 Comment

Carbon Emissions Global Warming News

Arctic Monitoring Stations Report CO2 Levels of 400 parts per million

June 1, 2012August 3, 2012Thomas SchuenemanLeave a Comment