<Tr> <Th_colspan="2"> Casualties </Th> </Tr> <Tr> <Td_colspan="2"> 12,000 Dead </Td> </Tr> <Tr> <Td_colspan="2"> 200,000 Injured </Td> </Tr> <P> The Great Smog of London, or Great Smog of 1952 sometimes called the Big Smoke, was a severe air - pollution event that affected the British capital of London in December 1952 . A period of cold weather, combined with an anticyclone and windless conditions, collected airborne pollutants--mostly arising from the use of coal--to form a thick layer of smog over the city . It lasted from Friday, 5 December to Tuesday, 9 December 1952 and then dispersed quickly when the weather changed . </P>

What did london do to get rid of its air pollution