Ozone is not a relic, it's constantly generated in the stratosphere through exposure of O2 to UV light. If the rate of ozone depletion goes down that means it g

Ozone is not a relic, it's constantly generated in the stratosphere through exposure of O2 to UV light. If the rate of ozone depletion goes down that means it gives more of a chance for natural ozone (re)generation to catch up. Which has indeed been the case. Additionally, the "ozone hole" is not a permanent phenomenon, it's a temporary event that occurs in the local spring and dissipates after several weeks (again because the race between ozone creation and depletion ends up being won by creation). See, for example, ozone concentrations over Antarctica in September: https://ozonewatch.gsfc.nasa.gov/monthly/climatology_09_SH.html https://ozonewatch.gsfc.nasa.gov/monthly/climatology_09_SH.h... Versus December: https://ozonewatch.gsfc.nasa.gov/monthly/climatology_12_SH.html https://ozonewatch.gsfc.nasa.gov/monthly/climatology_12_SH.h...