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WMO

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

June 3, 2014 by Tom Schueneman
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Carbon Levels and Environmental Risk

The World Meteorological Organization has reported that, for perhaps the first time in human history, atmospheric concentrations of carbon dioxide (CO2) eclipsed 400 parts-per-million (ppm) in the northern hemisphere for the entire month of April.[read more]