Acid rainDefinition (http://www.eionet.europa.eu/gemet/concept?cp=51&langcode=en&ns=1) Rain having a pH less than 5.6. The acidity results from chemical reactions occurring when water, sulphur dioxide, and nitrogen oxides, generally released by industrial processes, are chemically transformed into sulphuric and nitric acids. (Gemet) Preferred Units: N/A Scope Note:
N/A This term is used for the following terms:
Acid precipitation
Approved Date
21-Feb-2014 Items having a keyword or observed-property relationship to this subject term Click here to give feedback on this term or suggest an update. | 
