Answers

2015-08-09T08:09:45+08:00
Acid precipitation is 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 less than 5.6 (the normal acidity of unpolluted atmosheric water) and is often less than pH 5.0. Also called acid rain.
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