While I doubt the truth of the anti-freon claims
The opening sentance of the essay loses me completely.
It is more than chlorine at altitude that is behind the ideas of freon and enviro destruction.
If it was simply chlorine, then that volcano in Antarctica would have killed the ozone by now since it shoots many times the chlorine per year into the upper atmosphere than all human industry ever has.
Maybe it was scam to protect DuPont as the patents ran out....but that is too cynical for me to consider as credible.
Ed