Acid rain

Jump to navigation Jump to search


Acid rain is defined as precipitation (rain, snow, or sleet) having a PH below 5.6 . Nonpolluted rain has a pH of about 5.6 due to the dissolved Carbon dioxide that naturally forms some Carbonic acid. More deleterious pollutants, such as Sulfur dioxide and Nitrogen oxides, are produced from combustion sources, coal smoke, chemical manufacturing, and smelting. Water vapor condenses on the pollutant particles and reacts to form acids. This acidic precipitation is very detrimental as it can kill trees, destroy freshwater animals, corrode metal, and dissolve carbonaceous stones (Limestone and Marble).

Synonyms and Related Terms

acid precipitation; acid deposition; Saurer Regen (Deut.); pluie acide (Fr.); zure regen (Ned.); lluvia ácida (Esp.); chuva ácida (Port.);

Resources and Citations

  • Encyclopedia Britannica, Comment: "acid rain." Accessed: 1 June 2005 . Gives pH level as 5.6 or below
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998