The Great Smog of 1952: From December 5 to December 9, 1952, a thick fog settled on London. This fog mixed with trapped black smoke to create a deadly layer of smog. Although there was no great panic at the time, the smog proved deadly. In the five days it hovered over London, the smog killed 4,000 people. In the following weeks, another 8,000 people died from exposure to the Great Smog of 1952.
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