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Breathing easier [Editorial]

The American Lung Association's latest ranking for U.S. cities with the worst air pollution rates the Baltimore-Washington area ninth worst for ground-level ozone, exceeded only by smog-shrouded regions of California and Texas. No other community on the East Coast comes close, not New York, not Boston, not Philadelphia. In this report card, Baltimore gets an "F," but the consequences are far worse than mere failure. Ground-level ozone, created when emissions from smokestacks and tailpipes interact with sunlight, is extremely hazardous to human health. Breathing problems, asthma attacks, heart attacks and even premature death have been linked to ozone exposure. The region has...