CNN: Concentrations of greenhouse gases in the Earth's atmosphere reached record highs in 2011, according to new data published by the World Meteorological Organization (WMO). The WMO's annual Greenhouse Gas Bulletin, released Tuesday, reports that carbon dioxide rose to 390.9 parts per million (ppm), up two ppm on 2010 levels. Carbon dioxide is the single most important greenhouse gas emitted by humans, says the WMO, and the increases recorded last year are in line with average rises seen each...
URL: http://edition.cnn.com/2012/11/20/world/europe/greenhouse-gases-record-high/
Enclosure: http://i2.cdn.turner.com/cnn/dam/assets/121120020842-coal-greenhouse-gas-rise-story-top.jpg
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