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Goodbye, CFCs. Hello, HCFCs, oh no http://apocadocs.com/s.pl?1287235733
The cholorofluorocarbons, to give them their full name, are long gone from our lives. They have been banned from industrialised countries by international treaty since the mid- 1990s, and developing countries have followed suit. But because they are particularly long-lived substances, they have stuck around at dangerous levels in the atmosphere, continuing to do their worst. Now, finally, they have begun to decline. The world's most authoritative survey - the four-yearly Scientific Assessment of Ozone Depletion, compiled by 300 senior scientists - reported this autumn that levels of CFC 12, one of the most common types, have fallen for the first time.... The substances being used to replace CFCs - HCFCs and HFCs - though much better for the ozone layer, also contribute to global warming.... But emissions of HFCs are sky-rocketing, with no end in sight: the new assessment reckons that, if uncontrolled, they could undo all the good for the climate done by banning the CFCs in the first place.
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[Read more stories about:
airborne pollutants, climate impacts]
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'Doc Jim says:
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An atmospheric HCFCatch-22.
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