This is an excellent article in the art of making things up. They found that the ozone hole existed before freon, and then blamed carbon tetrachloride "because it's there".
The physics hypothesis is that we always had it, and it is related to temperature. During our cold cycles, nothing at all happens in the ozone layer, so no ozone is formed.
This was always my best example of "dogma over the Scientific Method". nasa needed some drama, found one chlorine atom on a plane survey, and conjured up the whole freon disaster. The funny thing is that they still had some scientists in the basement who followed the SM. Those guys did an experiment in their atmospheric chamber, and published that no chemical reactions were possible under the extreme cold and vacuum-like conditions. Hoo Boy! They were destroyed, and the papers, which I once read, disappeared from the Universe.
After that, no more sm.
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