Think Air Quality Regulations Don't Matter? Look at Pittsburgh in the 1940s!
credit: Smoke Control Lantern Slide Collection, ca. 1940-1950, AIS.1978.22, Archives Service Center, University of Pittsburgh.
Widely held beliefs didn't help the anti-smoke movement move forward: "The commonly held view that high smoke output indicated high productivity also discouraged the passing of strong legislation. In addition, many people felt that coal smoke was good for the lungs and helped crops grow."
It kind of reminds me of some people today...
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