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Back in '52, London got hit with a deadly fog from coal smoke and cold weather trapping pollution. Over 5 days, visibility dropped to almost nothing, and thousands died from respiratory issues. Crazy how bad air could get.

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Pretty wild event, right? In December 1952, a thick, toxic fog blanketed London for days, killing thousands due to coal smoke and pollution. Visibility was near zero, and it basically paralyzed the city. Led to major air quality reforms after that