Forbes: America's Dirtiest Cities

2. Los Angeles-Long Beach-Riverside, CA

Millions of cars, a huge port in Long Beach, busy airports -- at least L.A.'s smog is better than it used to be.
(iStock)

More From Forbes:
America’s Most Dangerous Cities
America’s Dirtiest Hotels
The Most Beautiful College Campuses



The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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