What middle-size cities offer: Clean Air

Air pollution continues to plague many large U.S. cities, where coal plants and tailpipe emissions poison the air with asthma-aggravating, cancer causing ozone and particle emissions. But the picture, and the air, is much clearer in Peoria, Springfield and a few dozen other mid-sized meccas, according to the American Lung Association’s annual report. See what the air rates where you live.