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acid precipitation


from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Precipitation abnormally high in sulfuric and nitric acid content that is caused by atmospheric pollutants.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water


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