Density has little to do with mass movement of dilute gases in the environment are you really going to try to argue over a proven scientific fact that Dichlorodifluoromethane depletes the ozone layer really? There is literally hundreds of studies , satellite spectral data and directly atmospheric sampling at altitude with U2 aircraft from NASA to prove it. You are wrong flat out wrong and that’s the end of it Google scholar and an afternoon of reading comprehension is where you need to be.
Silly. Go back and take high school chemistry again.
“Density has little to do with mass movement of dilute gases in the environment...”
So what atmospheric process do you propose is powerful enough to offset both gravity and buoyancy?