Volume 94 Issue 46 | p. 10 | Concentrates
Issue Date: November 21, 2016

Mechanism behind London’s ‘killer fog’ of ’52 identified

Chemistry points to the need to curb nitrogen dioxide and ammonia emissions to prevent severe haze events in China
Department: Science & Technology
Keywords: pollution, atmospheric chemistry, environment, smog, haze, air quality

London’s “Great Smog” of 1952 killed thousands and led the U.K. to enact clean air laws in subsequent years. Severe haze events still present a serious air-quality problem, particularly in China, but even after all these years the chemistry behind how airborne chemicals and particulates combine to produce such haze remains hazy. A key component is aqueous oxidation of sulfur dioxide to sulfate by nitrogen dioxide, says an international team of researchers led by Gehui . . .

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