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acid precipitation
noun
- meteorological precipitation that is relatively acidic.
acid precipitation
- Any form of precipitation, including rain, snow, hail, fog, or dew, that is high in acid pollutants, especially sulfuric and nitric acid. Acid precipitation has a pH of less than 5.6 (the normal acidity of unpolluted atmospheric water) and is often less than pH 5.0.
- Also called acid rain
- See Note at acid deposition
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Word History and Origins
Origin of acid precipitation1
First recorded in 1975–80
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