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Like Smog, Particulates Must Be Cut to Improve Air Quality.

By Richard Stradling, The News & Observer, Raleigh, N.C. Knight Ridder/Tribune Business News

Jun. 27--They came to hear about ozone and smog, but the business and government leaders gathered at the Environmental Protection Agency on Thursday also got a preview of what may be the Triangle's next air pollution challenge: particulates.

Particles of soot smaller than one-seventh the width of a human hair can lodge deep inside people's lungs, damaging lung tissue and triggering heart attacks, according to EPA scientists. The federal government will begin en

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