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    Photos Of Pittsburgh's Air Pollution: 1940s Vs. Today

    Coal fumes in the 1940s blotted out the sun. Gas lamps sometimes had to be lit during the day.

    600 Liberty Avenue

    Monongahela Wharf

    Corner of Fifth Avenue and Wood Street

    Pittsburgh Train Station

    Corner of Liberty and Fifth Avenues 8:38 AM

    Corner of Liberty and Fifth Avenues

    Allegheny Courthouse

    Workers washing the smog-blackened exterior of Allegheny Courthouse


    This photo was taken at 12:10 PM

    Unidentified street in Pittsburgh

    Corner of Liberty and Fifth Avenues

    Wabash Bridge (now demolished) and unidentified Downtown church during midday

    Around the same time, St. Louis was also fighting to reduce air pollution

    Federal Building in St. Louis

    For more about pollution in that era, read about the Donora Smog, which killed 22 people and sickened more than 5,000 in 1948.