Graphic showing that as pollutants increased in the air, so did the death rate in London during December 1952.

Research by Rutgers University's Paul Lioy and others shows that as the amount of smoke and pollutants in the air shot up during the week of Dec. 5, 1952, so did the death rate in greater London. Estimates say the smog killed anywhere from 4,000 to 11,000 people.
Credit: Paul Lioy, Rutgers University

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