Mauna Loa, Hawaii Monthly Mean CO2 for the Past 50 Years

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    Credit: NOAA

    This simple graph of the Mauna Loa Carbon Dioxide Record documents a 0.53 percent or two parts per million per year increase in atmospheric carbon dioxide since 1958. This gas alone is responsible for 63 percent of the warming attributable to all greenhouse gases according to NOAA's Earth System Research Lab.

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