Word: smog
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Dates: during 1940-1949
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...rises into the air, the sulphur dioxide combines with water vapor and oxygen to form sulphuric acid. The minuscule droplets pick up more water and a variety of solid particles (e.g., soot, dust), until the City of the Angels wears, instead of a halo, a hat of dirty grey smog...
...warm, smoggy air would continue to rise and the winds would disperse it. But Los Angeles' upper air, instead of getting progressively cooler at higher levels, has a peculiar temperature inversion. There is a warm layer, usually at 1,000 to 3,000 ft., which sits on the smog. Prevailing winds from the Pacific High cannot readily blow the heavy cloud away to the east because of the mountains which half ring the city...
Twice last week, wind & weather pushed the smog down so low that it cut visibility at street level. Moviemakers gave up plans for outdoor shooting and concentrated instead on interior scenes. Hundreds of citizens' eyes began to smart and water. Scientists could offer them no relief. There were scores of substances in smog: which of them caused eye irritation was still a mystery...
Preserved In Oil. A month ago the American Chemical Society (meeting in smog-free San Francisco) heard the results of investigations carried out by the Stanford Research Institute and financed by the Western Oil & Gas Association. Said S.R.I.'s Paul L. Magill: elemental sulphur (i.e., not in compounds) might be to blame for eye irritation. So might some aldehydes. Another theory offered to the chemists: organic peroxides might be the tear-jerking villains. Dr. Lucien Dau-trebande, a Belgian smog expert, also working at S.R.I, with Oil & Gas funds, said that an eye irritant would be at least twice...
...poisonous smog...