Smog
Videos
Smog, or smoke fog, is a type of intense air pollution. The word "smog" was coined in the early 20th century, and is a portmanteau of the words smoke and fog to refer to smoky fog due to its opacity,
Airplane used to collect airborne hydrocarbons, May 1972
Photochemical smog in California near the Golden Gate Bridge in December 2003. The brown coloration is due to the NO2 formed from photochemical smog reactions.
Highland Park Optimist Club wearing smog-gas masks at banquet, Los Angeles, circa 1954
During the autumn and spring months, some 500 million tons of rice and wheat crop residues are burnt, and winds blow from India's north and northwest towards east. This aerial view shows India's annual crop burning, resulting in smoke and air pollution over Delhi and adjoining areas.
Pea soup fog
Videos
Pea soup fog is a very thick and often greenish-yellow fog caused by air pollution that contains tarry soot particulates and the poisonous gas sulphur dioxide. This very thick smog occurs in cities an
Smog
…of the words smoke and fog to refer to smoky fog due to its opacity, and odour. The word was then intended to refer to what was sometimes known as pea soup fog, a familiar and serious problem in London from the 19th century to the mid-20th century, where it was commonly known as a London particular or London…
Piccadilly Circus during the Great Smog of London, 1952