An hour's drive down the Monongahela River from Pittsburgh, a sleepy small town sits forgotten by the world. Few know that this place was once the site of one of the worst environmental pollution disasters of the 20th century, and the catalyst for changing laws and standards in the US. This is Donora, Pennsylvania. But what happened here?

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Sources Used in this Episode:

Donora Borough: http://donoraboro.org/

Smithsonian Magazine: https://www.smithsonianmag.com/history/a-darkness-in-donora-174128118/

Quartz: https://qz.com/1117029/the-sudden-death-of-26-people-in-a-tiny-american-town-on-halloween-weekend-shows-the-bleak-reality-of-life-before-clean-air-laws/

Donora Historical Society: https://www.sites.google.com/site/donorahistoricalsociety/donora-history/Founding-of-Donora?authuser=0

https://www.sites.google.com/site/donorahistoricalsociety/donora-history/1948-smog?authuser=0

Wikipedia: https://en.wikipedia.org/wiki/Donora,_Pennsylvania

National Weather Service: https://www.weather.gov/media/lzk/inversion101.pdf