The Great Smog of London, or Great Smog of 1952, was a ____ pollution event that affected London, England, in early December 1952. A period of unusually ____, combined with an anticyclone and ____, collected airborne pollutants--mostly arising from the ____ to form a thick layer of smog over the city. It lasted from Friday 5 December to Tuesday 9 December 1952, then dispersed quickly when the weather changed. It caused major disruption by reducing visibility and even penetrating indoor areas, far more severely than previous smog events, called ____. Government medical reports in the weeks following the event estimated that up to 4,000 people ____ as a direct result of the smog and 100,000 more ____ by the smog's effects on the human respiratory tract. More recent research suggests that the total number of fatalities may have been considerably greater, with estimates of between 10,000 and 12,000 deaths. London ____ since the 13th century from ____ and this worsened in the 1600s. The Great Smog is thought to be the worst air pollution event in the history of the United Kingdom, and the most ____ for its effects on environmental research, government regulation, and ____ of the relationship between air quality and health. It led to several changes in practices and regulations, including the Clean Air Act 1956.

Great Smog of London

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