On Dec 9, 8:23*am, Roger Chapman wrote:
dennis@home wrote:

"Clive George" wrote in message
news:u6KdnTC7p4rYIoPWnZ2dnUVZ8kidnZ2d@brightview. co.uk...

It didn't just repair itself. It was pointed out that we were chucking
nasty things into the atmosphere, people stopped doing some of that
and then it started to repair itself.

I think you will find the "hole" was repairing itself before a
significant drop in the CFCs occurred.

http://en.wikipedia.org/wiki/File:Min_ozone.jpg

Where's the data for pre-1979? How do YOU know there was an unnatural
hole in the ozone layer. Given the significant year-on-year variation,
that graph proves nothing except that there was a decrease from the
1979 level. It's also a classic example of truncating the vertical
axis to make it appear to the less observant that the low point was
virtually zero.

MBQ