Deaths of this scale, attributed to polluted fog, have never happened again. The killer fog spurned on the government to create clean air laws in 19, banning black smoke emissions and forcing residents and factory owners to switch to smokeless fuels. This deadly weather event, the Great Smog. Theatres closed as the smog crept inside and audiences could no. On December 5, 1952, people in London, England, began to suffer respiratory illnesses after breathing thick smog. Weekend football was cancelled because players could not see across the pitch. Initially, there was little alarm as London frequently experiences heavy fogs of water vapor. In addition, and perhaps most dangerously, 370 tonnes of sulphur dioxide were converted into 800 tonnes of sulphuric acid." The smog began on 5 December 1952, a Friday. In December of 1952, with domestic coal consumption peaking thanks to a lingering cold front, a cloud of fog permeated the city for five days, from December 4 to 9. "1,000 tonnes of smoke particles, 2,000 tonnes of carbon dioxide, 140 tonnes of hydrochloric acid and 14 tonnes of fluorine compounds. The Great Smog of London, or Great Smog of 1952, was a severe air pollution event that affected London, England, in December 1952. "On each day during the foggy period, the following pollutants were emitted," the UK's Met Office explained. However, an anticyclone was above the city at the time, pushing air - and any pollutants from homes and factories alike - downwards towards the ground, trapping polluted particles from dispersing at higher altitudes. Normally, smoke from the coal would rise into the atmosphere where it would disperse. In just over 4 days the city was overwhelmed by acrid. In November and December, the weather had been unusually cold, and people began to burn more coal to keep themselves warm. In December 1952, London suffered one of the worlds worst peacetime catastrophes. Evaporation of those fog particles then left smaller acidic haze particles that covered the city.” Then, in 1952, a four-day fog dubbed The Great Smog hit amid a perfect storm of weather conditions, causing major disruption in transport.
Natural fog contained larger particles of several tens of micrometers in size, and the acid formed was sufficiently diluted.
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