Article: Air-pollution researchers on a mission.

Byline: Mark Arsenault

Jul. 27--PROVIDENCE -- Environmentalists staked out on a Route 195 overpass yesterday say their instruments can confirm what your nose suggests, that diesel engines pollute the air with fine particles.

"Already we can see that when a diesel truck goes by, the numbers go way up," said Madeleine Weil, a policy analyst for Environment Northeast, a nonprofit environmental research and advocacy organization.

With help from local environmentalists, Environment Northeast is undertaking two days of air-pollution measurements around greater Providence, as part of a New England campaign to reduce diesel pollutants.

Their ...

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