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


The graph on CFC's is interesting. Seems to be a clear decline since The
Montreal Protocol in 1989 so it shows that in some cases things can be
done.
Dave

I get a rather less positive view from the data at

http://www.esrl.noaa.gov/gmd/aggi/ Table 2.


--
Gianna

http://www.buchan-meteo.org.uk
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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