Well, The chemistry that does in O3 (ozone) works on solid surfaces. How many clouds do you see way up there? Ya it really worked out well for Du Pont, didn't it. Imagine that. I am really tired of government for the few and screw the rest. (Join the PPP penny pinching people's party) Blowing up kids so that Du Pont can make a profit. Hmm. Ford Pinto?