Exactly this headline is BS..
You can’t say “CFC’s are one of MANY factors”, but the claim Banning CFC’s had nothing to do with it...
There is NO doubt CFC’s reached the upper atmospheres, and were broken down by sunlight, the chlorine molecules would then steal an O from the O3, creating ClO... which would then lose its O to another stray O molecule, creating Cl again and O2 and the CL would then steal an O from another O3 molecule and the process would continue to repeat...
CFCs were bad, are bad, and the worldwide ban has been a good thing... sadly some countries still manufacture them, but the vast reduction in their production and release into the atmosphere is a good thing.
Yup. CFCs breakdown in sunlight and the lighter chemicals were floating upward.
I remember my dad talking about it when it happened. There wasn’t much of a fuss about it because the experimental evidence was so clear and replicable (unlike AGW).