Think Air Quality Regulations Don't Matter? Look at Pittsburgh in the 1940s!

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Smoke Control Lantern Slide Collection, ca. 1940-1950, AIS.1978.22, Archives Service Center, University of Pittsburgh.

credit: Smoke Control Lantern Slide Collection, ca. 1940-1950, AIS.1978.22, Archives Service Center, University of Pittsburgh.

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"Finally, in 1941 an effective smoke control ordinance was passed in the city of Pittsburgh. Unfortunately, the onset of World War II delayed the enactment of the legislation until 1946. Smoke control was not forgotten during the intervening years, however."