‘For more than a century, Pittsburgh was marked as a smoky city. In 1941 an effective smoke control ordinance was passed in the city of Pittsburgh regulating the burning of coal, but the onset of World War II’
Pittsburgh before smoke control
Pittsburgh before smoke control
‘For more than a century, Pittsburgh was marked as a smoky city. In 1941 an effective smoke control ordinance was passed in the city of Pittsburgh regulating the burning of coal, but the onset of World War II’
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