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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