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Worst asthma cities
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Ranked from highest to lowest, these are cities with the highest average annual pollen levels, high air pollution, lack of 100 percent smoke-free laws, and highest number of patient over-use of asthma medications.
1. Knoxville, Tenn.
2. Tulsa, Okla.
3. Milwaukee
4. Atlanta
5. Memphis, Tenn.
6. Allentown, Pa.
7. Charlotte, N.C.
8. Greenville, S.C.
9. St. Louis
10. Greensboro, N.C.
Source: Asthma and Allergy Foundation of America
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