[mark the shark]

In my a/c classes it was stated that it was the chlorine that broke out of the combination and then migrated into the upper atmosphere and combined with O3 that produces the harmful effects. I never bought the argument in class and I always asked for supporting data but all I got was politically correct regurgitation.
I'm still leaning toward the theory that Du pont's patents were running out and it positioned them to sink R-12 as a bad gas and environmentally unsafe. The garbage I'm having to use now instead of R-12 is more unstable, more toxic and operates at much higher pressures, making things alot more interesting when things go wrong. If you doubt my conclusions get a copy of some of the ASHREA engineering data and read the charts and accompanying technical data on the gases and draw your own conclusions.

[sparkydragon]

I probably wouldn't be too suprosed to find out you were right. I'd certainly believe that most of the enviornmental policy had more to do with someone's self interest rather than altruism.

sparky