It is my understanding that the “ozone hole” fluctuates seasonally and has only been “measured” since the from the ground since the ‘50’s and orbitally since the late ‘70’s.
You are correct. Holes in the ozone layer have existed at the poles periodically for thousands or millions of years. But we do not know the extent because measurements have only been taken in relatively recent times. In theory pollutants such as CFCs might make the holes larger than they might be otherwise, but this is strictly in theory. No one knows how much actual effect "pollutants" have on the ozone layer. The holes exist naturally and they fluctuate daily as the earth spins and seasonally and annually by natural processes and variations in the output of the sun and the distance of the earth from the sun. The ozone holes can expand quickly and recover quickly as well. It is just another natural phenomena that the left has found advantageous to create anxiety over to increase regulation and taxes.
https://knowledgedrift.wordpress.com/2010/05/22/ozone-the-hole-that-always-was/
That’s correct, trees an foliage create Ozone through their photo synthesis replenishing the natural loss of Ozone. I guess if China and India placed stricter rules on their emissions the atmosphere would become cleaner and the ozone layer would be thicker.
Researcher finds higher summer ozone concentrations in ...
phys.org › Earth › Environment
(PhysOrg.com) — A Georgia State University researcher has found that the highest concentrations of summertime ozone — a major air pollutant and respiratory health ...