LA Times
L.A., Bakersfield remain among U.S.’s most polluted cities, report says:
American Lung Assn. says smog and soot levels dropped significantly in Southern California over the last decade, but the L.A. area remains the worst region in the nation for ozone pollution.
Link to Article: http://articles.latimes.com/2011/apr/27/local/la-me-california-air-20110427
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