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10 U.S. Cities With the Cleanest Air

Here are the 10 U.S. cities with the cleanest air, according to the American Lung Association’s annual report, which looks at levels of ozone and particulates (tiny particles that can get lodged in your lungs).

Credit: Corbis

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Duluth, Minn.

Population: 276,368

Small size, remote location, and cold weather conspire to make Duluth one of only seven cities in the U.S. to make it on the list for both lowest year-round particle pollution and ozone levels.

Of course, restrictions over the burning of trash and an EPA-funded program to reduce dirty diesel-burning school buses can only help Duluth keep its air clean.

Next: Fargo, N.D.