Greenhouse Gases Increase to Record in Atmosphere, UN Says
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Carbon dioxide, methane and nitrous oxide, the main man-made greenhouse gases blamed for global warming, increased to record post-industrial concentrations last year, the United Nations said.
Carbon dioxide, the most important heat-trapping gas, last year rose to 386.8 parts per million molecules of air, the UN’s World Meteorological Organization said today in an e-mailed statement. That’s 1.6 ppm higher than in 2008. The methane concentration increased by 6 parts per billion while nitrous oxide rose by 0.7 parts per billion.