Bull
First, they discovered there was an zone layer
Second they discovered it wasn't total coverage, there was a "hole in it over the North Pole
Then they decided it was due to aerosol sprays like the hairspray Aquanet that kept the foxes of the 70s looking foxy
Strangely enough, I've seen weather reports on tv out of Los Angeles where they said "Today's major pollutant is ozone…"
If ozone is bad, then why repair a layer of it?
Oh, money and power and regulations to make morans think politicians are doing something because "scientists" said so
I also recall the "omg, we're heading for another Ice Age!"