Atmospheric CO2 concentrations, 1958-2005

Atmospheric CO<sub>2</sub> concentrations, 1958-2005

© 2005. National Aeronautics and Space Administration. Earth Observatory.

Charles David Keeling measured CO2 concentrations at Mauna Loa Observatory in Hawaii, more than 11,000 feet above sea level, to obtain data that did not include emissions from nearby vegetation or human activities. His measurements show a steady rise in atmospheric CO2 concentrations over 47 years.

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