charby:
The EPA has instituted particulate requirements that can never be met by some cities, ever. They have not ever met those standards and will never meet those standards. And by "not ever," I mean "before the advent of the written word, let alone diesel exhaust." If one lives in an arid or semi-arid area, silt, dust, etc blowing about will do the trick quite nicely. As will wildfires from hundreds of miles away.
Also, they dump these new standards into old indices, like the Air Quality Index and fiddle with the requirements, making the index less useful by jacking everything up one more level.
Then, the EPA wants to regulate CO2 as a pollutant.
I could go on, with the numerous enforcement outrages, but any rational look at the EPA will come to the conclusion that it is out of control.