L.A. tops list of nation's most polluted
NOAKI SCHWARTZ, Associated Press Writer
Tue May 1, 7:57 AM ET

...The Pittsburgh area was ranked as the nation's second most polluted metropolitan area followed by Bakersfield, Calif., Birmingham, Ala., Detroit and Cleveland. Visalia, Calif., Cincinnati, Indianapolis and St. Louis rounded out the top 10...
Top Ten most polluted cities:

10. St. Louis
9. Indianapolis
8. Cincinnati
7. Visalia, CA
6. Cleveland
5. Detroit
4. Birmingham, AL
3. Bakersfield, CA
2. Pittsburgh
1. Los Angeles

NFL teams associated with most polluted cities (least to most polluted):

6. Rams
5. Colts
4. Bengals
3. Browns
2. Lions
1. Steelers