31 May '12, 5pm

Atmospheric CO2 Levels Over Arctic Have Reached 400 Parts Per Million

has hit a troublesome milestone: the concentration of CO2 has surpassed 400 parts per million. Stations across the region in Alaska, Greenland, Norway and Iceland have recorded the measurements that have surged since the winter and spring have brought a decline in CO2-absorbing vegetation. While the downswing in carbon absorption happens every year, this is the first time in 800,000 years that the CO2 concentration anywhere in the world has been 400 ppm or above.

Full article: http://www.ecogeek.org/monitoring-pollution/3776-atmosphe...

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