3. Dallas-Fort Worth, TX-OK
Dallas-Fort Worth is ranked 13th for the ozone days out of 228 metropolitan areas which makes it one of the most polluted areas in the US. In addition, it is ranked 72nd for 24-hour particle pollution out of 186 metropolitan areas and 39th for annual particle pollution out of 184 metropolitan areas. The number of people with lung cancer is estimated to be 4,071.
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