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WMO: Greenhouse Gas Concentrations Reach Record High

Atmospheric greenhouse gas concentrations reached a new record high in 2013, with carbon dioxide (CO2) levels rising more than in any year since 1984, according to the World Meteorological Association’s latest annual Greenhouse Gas Bulletin.

Global Greenhouse Gas Levels Hit New Record

On Tuesday the United Nations World Meteorological Organization (WMO) reported in its Greenhouse Gas Bulletin that the volume of atmospheric greenhouse gases hit a new record in 2011. Carbon dioxide, the principal greenhouse gas, reached a level of 390.9 parts per million (ppm) in 2011, or 140 percent of pre-industrial levels. The WMO estimates that since 1750 about 413 billion…

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