Greenhouse gases hit new record - UN
Greenhouse gases reached a new record level in 2011, the World Meteorological Organization said Tuesday.
The body, an agency of the United Nations, said in a statement that there had been a 30 percent increase in the warming effect on the climate between 1990 and 2011.
It said the level of carbon dioxide – which accounts for about 80 percent of the warming effect – and other so-called greenhouse gases such as methane and nitrous oxide had reached the carbon dioxide-equivalent of 473 parts per million in 2011.
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WMO Secretary-General Michel Jarraud said in the statement that billions of tons of carbon dioxide emitted since the start of the industrial age in 1750 would “remain there for centuries, causing our planet to warm further and impacting on all aspects of life on earth.”
http://worldnews.nbcnews.com/_news/2012/11/20/15302748-greenhouse-gases-hit-new-record-un?lite
