UN: Concentrations of greenhouse gases hit record - Yahoo! News:
'via Blog this'
Global warming gases have hit record levels in the world's atmosphere, with concentrations of carbon dioxide up 39 percent since the start of the industrial era in 1750, the U.N. weather agency said Monday.
The new figures for 2010 from the World Meteorological Organization show that CO2 levels are now at 389 parts per million, up from about 280 parts per million a quarter-millenium ago. The levels are significant because the gases trap heat in the atmosphere.
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