The biggest contributor to foul air is airplanes.
Back during 911
I lived in a rural eastern Colorado area where the humidity generally ran from 45-70%. Not high humidity. We had several feed lots in the area which stank to high heaven, lots of wind translates into tons of dust which carried the stink. Lots of corn grown in the area as well as alfalfa, sorgum, wheat, potatoes, onions, mellons.
Within 150 miles of an afb.
When 911 happened and the planes were grounded for a week, for the first time ever in that community, the air became clear, clean, and smelled fresh. It was even quiet. Didn’t realize that there is a lot of unnoticed sound pollution involved with air traffic till it was gone.
Didn’t realize the contribution to air pollution that planes made till they were grounded. It took a freaking WEEK for the air to clear...a WEEK! One little bitty week and the air was nearly pristine.
I don’t want to hear the BS regarding greenhouse gasses and dirty air when clearly the problem is not the every day person with a car. The problem clearly is air traffic which also includes space programs that damage the atmosphere.
Honestly, I was stunned. But what the hey...I am merely one of those low level info deplorables whose input is meaningless.
However, it’s enough for ME to know about the false taxation game without a genuine cause. Someday, all the dirty laundry will air and it won’t leave ME stuttering, that’s for sure!
Local problem with temperature inversion as was Los Angeles? Off-road diesel and ship bunker oil with high sulfur usually take the prize for noxious odor.