November 21, 2012
Greenhouse Gases Hit Record Highs in 2011
Matthew Knight, 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.
TAGGED: nitrous oxide, methane, carbon dioxide, greenhouse gas