Greenhouse Gases at Historic High

United Nations' World Meteorological Organization (WMO) reports that greenhouse gases reached a recored high in 2011. 

Carbon dioxide levels reached about 390.9 parts per million last year, which is 140 percent of the pre-industrial level of 280 parts per million and nearly 2 parts per million higher than the 2010 carbon dioxide level, according to the WMO report.

Via: Yahoo! News