California metros have the country's worst air, followed by Phoenix and Pittsburgh.
Remember the fog that lingered over Beijing during the 2008 Summer Olympics? It wasn't fog. It was dirty air. Yes, China faces a world-class air quality problem. But before you get too smug about its smog, consider this: 154.5 million Americans, just over half the nation's population, live in areas where air pollution levels are often dangerous to breathe. That's according to the American Lung Association's (ALA) just-released report 2011 State of the Air.
The cities ranked worst in air quality? California metros like Los Angeles, Visalia, Hanford and Fresno. Bakersfield, Calif., ranked the worst in terms of short-term and year-round particle pollution. It also ranked second-worst, behind Los Angeles, for smog levels, known formally as ozone pollution.
California metros "really have made great strides to try to clean up, but they have a lot of sources--a lot of people driving, a lot of ships coming into the port, especially ocean-going vessels," explains Janice Nolen, lead author of the report and an assistant vice president of national policy and advocacy at the ALA. "Plus, California has the warm, sunny climate that encourages pollutants to form and the geography that helps trap them."
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