I have fond memories of helping my father replace the Freon in our window A/C units in the 1990s with products like R-410A. Thanks to that effort made by many,

I have fond memories of helping my father replace the Freon in our window A/C units in the 1990s with products like R-410A. Thanks to that effort made by many, "A 2005 IPCC review of ozone observations and model calculations concluded that the global amount of ozone has now approximately stabilized. Although considerable variability is expected from year to year, including in polar regions where depletion is largest, the ozone layer is expected to begin to recover in coming decades due to declining ozone-depleting substance concentrations, assuming full compliance with the Montreal Protocol." [0] [0] https://en.wikipedia.org/wiki/Ozone_depletion https://en.wikipedia.org/wiki/Ozone_depletion