I don't know much about this stuff...I do remember for years that the big problem was the ozone (up there around or in the atmosphere) and the growing hole in it...The sun's radiation shooting thru the ever increasing hole and the danger to our life and weather patterns...
We were running out of ozone...We were doomed...The smog was eating away at the ozone...
Lo and behold,
"The study examined a class of chemicals that are emitted as unburned fuel from automobile tailpipes and as vapors from industrial chemicals, but also which come naturally from tree leaves. These chemicals, known collectively as VOCs, react with other pollutants to form ozone, a bluish, irritating and pungent gas that is a major form of smog in the lower atmosphere."
Seems as tho the scientists have unwittingly found the solution to the problem...We're growing our own ozone...To plug that vast gaping hole???
What struck me in the article was the constant uses of the words, "may, could, possible, puzzle, etc....
But from the looks of this study we now have to make all the trees go away to save the earth. Makes you dizzy when you stir politics into the science stew.
The "good ozone" is high in the atmosphere, where it filters UV light.
"Bad ozone' is generated down here, where it interacts with other gases to make pollutants. Due to its volatility, little if any ozone generated by humans makes its way into the upper atmosphere.