Air quality

Great.  Pittsburgh is the worst city for short term particle pollution.  And second worst (behind Bakersfield) for worst long term particle pollution.

A lot of Americans feel comfortable about air pollution, and we often think that it's a problem in a few well-known places, said Dr. Norman H. Edelman, chief medical officer for the American Lung Association....
Pittsburgh topped the list of cities most polluted by short-term exposure to particles. It's still a dangerous city for particulate pollution, pointed out Edelman.