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GASP ! 35 years ! - PowerPoint PPT Presentation


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GASP ! 35 years !. Pittsburgh 1906. During World War II. Quenching coke. View from Liberty Bridge, 1954. View from Liberty Bridge, 1965. View from Liberty Bridge, 1970’s. Allegheny County Health Dept, Air quality monitoring, 1970’s. Darkness at noon. 1945, Darkness at 11:00am.

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