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co2-mauna-loa1.png

CO2 levels (in parts per million) from 1958 to 2009 as measured at Mauna Loa, Hawaii. Levels rise and fall within each year due to the annual cycle of plant respiration. The long-term increasing trend is due to the anthropogenic release of CO2, mostly from the burning of fossil energy resources.

May 5, 2010
http://www.davidsuzuki.org/blogs/panther-lounge/2010/05/atmospheric-carbon-dioxide-is-increasing/

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