Several new ozone-destroying chemicals have been discovered in the atmosphere undermining recovery of giant ozone hole over Antarctica, researchers have discovered. quote: The chemicals, which are also extremely potent greenhouse gases, may be leaking from industrial plants or being used illegally, contravening the Montreal protocol which began banning the ozone destroyers in 1987. Scientists said the finding of the chemicals circulating in the atmosphere showed ozone depletion is not yesterdays story. The new research, published the journal Nature Geoscience, analysed air samples captured since the mid-1970s in several ways. Air bubbles trapped in snowpack in Greenland, samples taken by scientists in Tasmania and others collected by aircraft flying 13 miles above Europe were all analysed. The team found three new CFCs and one HCFC, none of which had been identified before. In December, Nasa researchers revealed the discovery of a new greenhouse gas that is 7,000 times more powerful than carbon dioxide at warming the Earth and which has been in use by the electrical industry since the mid-20th century. The four newly identified compounds are also expected to trap heat thousands of times more powerfully than CO2. unquote theguardian/environment/2014/mar/09/ozone-hole-antarctica-chemicals
Posted on: Wed, 12 Mar 2014 06:43:25 +0000
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