To delete or not to delete ?

brulaz wrote:

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.

It is mainly N20 coming from the ground level because that is what is left from the NOx as it dissipates. Due to its volatility, NOx in itself has a rather short lifespan of a day or so and what is left of it goes into the stratosphere as good ozone. This is why it is harmless in sparsely populated areas and it is only densely populated areas with hot temperatures that cannot disperse it fast enough that are mainly effected.

So since the EPA has to make a "one rule for all" in regards to emissions, a person such as a farmer or one that lives in a rural area on a colder climate who will probably never drive their truck to an area with enough NOx to have any effect on human health still has to abide by the same rules a those city dwellers in places such as California where NOx is a health concern due to the heat and population density. How fair is that?