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acid fog

noun
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Definition of acid fog

: fog having increased acidity caused by environmental factors (such as atmospheric pollutants)
  • Even so, a combination of acid fog and ozone may have made trees on this and other Eastern summits more vulnerable to bugs, weather, and drought.
  • —Edmund Faltermayer,  Fortune,  17 July 1989

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First Known Use of acid fog

1878

in the meaning defined above

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