I have boxes of articles, newspaper coverage, etc. from the time when this was headlines; in the beginning duPont was totally against the theory, any ban or restrictions on its use and acted as though it was speaking for the whole industry associated with R-12.
Green-shaded experts at the home office reexamined the tenor of the debate and convinced the chemists that this was one battle they dare not win.
Measurement of any damage caused by seasonal ozone loss remains virtually impossible to assess.
I'm sure they like the higher profits they get from the Freon replacements. Even if they are less efficient.