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Greenhouse Gas to Reach 3-Million-Year High

2013-05-03 20:34:00| Climate Ark Climate Change & Global Warming Newsfeed

LiveScience: The proportion of carbon dioxide in the atmosphere is set to break 400 parts per million this month, levels not seen in 3 million years, according to one of the best climate records available. The Keeling Curve, a daily record of atmospheric carbon dioxide, has been running continuously since March 1958, when a carbon dioxide monitor was installed at Mauna Loa volcano in Hawaii. On its first day, the observatory measured a carbon dioxide concentration of 313 parts per million (ppm). That number...

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