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acid deposition
ac·id dep·o·si·tion


noun 
Definition:
 
acidic water vapor deposit: a deposit of water vapor formed in the atmosphere, e.g. dew, rain, snow, hail, or fog, that is high in acid content because of atmospheric pollution
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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