26 Haunting Photos Of The London Fog

London was covered in "fog" at the beginning of the 20th Century, culminating in the Great Smog in 1952.

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26. Date unknown, 1962: A policeman wears a mask for protection against the smog.

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The Clean Air Act was implemented in 1956, but the fatalities from the Great Smog are said to reach 12,000.