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> Climate Change Blog: CO2 Concentration Highest in 800,000 Years
Brett Anderson
post Mar 14 2012, 03:42 PM
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The concentration of atmospheric carbon dioxide in 2011 was the highest in 800,000 years, according to Australia's Commonwealth Scientific and Industrial Research Organization or CSIRO. The average, global concentration of carbon dioxide (CO2) during 2011 was 390 parts per million. The natural range during the past 800,000 years was between 170 and 300 ppm. CSIRO also noted that fossil-fuel emissions Read the full article

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