"The front window of this museum boasts “Clean Air Started Here”; well, that was only after this sleepy mill town on the Monongahela River experienced some very, very dirty air. Founded in 1901, Donora was a mill town, and in 1948, two large plants dominated the town – the US Steel-owned Donora Zinc Works, once the largest such plant in the world, and the American Steel & Wire plant." - Steven Perez from Bookmarklet