Atmospheric CO2 Tops 400 PPM

This year the daily average concentration of Carbon Dioxide (CO2) in the atmosphere has surpassed the 400 PPM (parts per million) mark. This observation has been recorded by the National Oceanic and Atmospheric Administration’s Mauna Loa Observatory in Hawaii. During the past 800,000 years until the early 20th century, the CO2concentrations have never exceeded 300… Continue reading Atmospheric CO2 Tops 400 PPM

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