Quote:You call yourself an environmental scientist and you don't even know that the concentration makes the poison? The chlorine in the atmosphere is mostly in the form of NaCl and HCl, but even if it were all in the form of free chlorine the concentration is insignificant health-wise. The NaCl and HCl in the atmosphere is still way more abundant than CFCs.


The whole idea of CFCs contributing ozone depletion is that they are carried into the upper atmosphere where UV breaks them down. 
The CFC molecule has no effect on ozone, which is what I originally stated. The CFC has to be broken down to create free chlorine in order to deplete ozone (so does NaCl and HCl).

 

But what should be an alarm bell for you is that the CFC=evil claim came about just at the time that Dupont had created a new fully-patented replacement (the freon patent had expired). Funny coincidence, no? And what's even funnier is that the replacement also has chlorine in it.