1 acid fog | Definition of acid fog
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acid fog

noun

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

First Known Use of acid fog

1878, in the meaning defined above

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