Tulsa County has received an F in air quality by the American Lung Association in its "State of the Air" report for this year. That doesn't surprise me. I know we're up there in the number of asthma cases we have.
A large part of the problem in Tulsa is the complete lack of decent public transporation options, so everyone has a car, and everyone drives everywhere. If we had, say, light rail, or even a reliable bus system that worked all the time, that would certainly help.