America's Most Polluted Cities Revealed

Pittsburgh, America's "Steel City," snagged a second designation — albeit a negative one — this week when, for the first time, the American Lung Association designated it the most air-polluted U.S. city. "Everyone has someone in their family whose health is threatened by the pollution we talk about in this report. Every day we're learning more about these dangers," said Bernadette Toomey, American Lung Association president and CEO. "One hundred twenty five million Americans live in areas that...Full Story