Here's what I would like to understand better. CFCs are much more dense than air so you would think they would sink and settle to the ground instead of floating to the top of the atmosphere. The explanation is that air currents carry the CFCs up there but most of the hairspray and stuff from the 80s was used inside i would think. Wouldn't the CFCs be on the floor or in the carpet then?

 

I don't fully understand the science behind this sort of thing but it seems fishy to me that something heavier than air would be reaching the upper atmosphere without any kind of propulsion. 

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