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Carbon dioxide levels hit landmark at 415 ppm, highest in human history

Ryan W. Miller and Doyle Rice, USA TODAY Comments Off on Carbon dioxide levels hit landmark at 415 ppm, highest in human history

Data from the Mauna Loa Observatory in Hawaii showed that carbon dioxide levels reached 415 parts per million on Friday.

Ryan W. Miller and Doyle Rice, USA TODAY
http://api-internal.usatoday.com.akadns.net

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