UN agency says carbon dioxide levels hit record high in 2014

November 9, 2015 10:03 AM

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UN agency says carbon dioxide levels hit record high in 2014

STOCKHOLM — The UN weather agency says levels of carbon dioxide and methane, the two most important greenhouse gases, reached record highs last year.

The World Meteorological Organization on Monday said CO2 levels rose to nearly 398 parts per million, from 396 ppm in 2013.

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