To delete or not to delete ?

ShinerBock wrote:

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NOx is only bad if it stays stuck in the troposphere like it does over population dense areas on hot days. In less populated areas and in cooler climates, it has a chance to dissipate into the stratosphere which is a good thing since it is an ozone gas that is also produced naturally. NOx in troposphere = Bad // NOx in stratosphere = Good
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Section "10.2.2 Nitrogen oxide radicals (NOx)" of this book:Introduction to Atmospheric Chemistry, says that there is some ozone loss in the stratosphere from NOx catalyzed reactions. But that the source of NOx there is N2O coming up from ground level, not the NOx itself coming up.

But I'm no atmospheric chemist, and much of what's in the book is meaningless to me. Still it might be of interest.

Many rural areas still have enough clean air left to handle NOx and other pollutants without major problems like smog. Like they used to say: "dilution is the solution to pollution". But the amount of clean air, like water, is getting less and less.