
The October 1948 air inversion in Donora, Pennsylvania, trapped industrial pollutants from a zinc works and steel mill, creating a thick, yellowish smog that persisted for five days. This event resulted in... Read more »

The thick, smog-like air pollution event that descended upon Donora, Pennsylvania, in late October 1948, trapped residents in a deadly inversion layer for five days. This atmospheric phenomenon prevented pollutants emitted from... Read more »

