"Gianna" wrote in message
...
Dave Cornwell wrote:

The reference you site above quotes "CFCs have ceased the increase
observed before about 1992 and have either leveled off or are in decline
(Montzka et al., 1999). The latter is a response to decreased emissions
related to the Montreal Protocol on substances that deplete the ozone
layer. "

I am referring specifically to CFC's so I'm not quite sure what the less
positive view is as illustrated here?
Dave



The effect of CFC 11 has reduced very slightly since 1997, and that is
good, but the larger effect of CFC 12 has only levelled, and thus the
amount of 'harm' it is doing has remained constant, and at its peak.
While a cessation of increase is welcome, the 'damage' done, and still
being done, is not (yet) reduced.



--
Gianna

http://www.buchan-meteo.org.uk
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Yes, I see what you are saying now.

Dave
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