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Soot soars in city, but smog drops - Pittsburgh Post GazetteCanada.comSoot soars in city, but smog dropsPittsburgh Post Gazette - Apr 30, 2007By Don Hopey, Pittsburgh Post-Gazette. There's a new layer of grimy soot covering that "most livable city" title Pittsburgh claimed just five days ago.Indy's air among nation's dirtiest Indianapolis StarSmog down, but soot in Eastern states worse: report MarketWatchBoston Globe - Houston Chronicle - Reuters - Annapolis Capitalall 482 news articles read more... |