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When the Fog Rolled Into Town, 20 People Suffocated to Death. What Made the Air So Deadly?

A confluence of geography, weather, and industrial pollution devastated Donora, Pennsylvania, and forced the government to take action.

A confluence of geography, weather, and industrial pollution devastated Donora, Pennsylvania, and forced the government to take action.

6 days ago

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Popular Mechanics broke the news 6 days ago on Tuesday, April 21, 2026.

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