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Acid Rain - English
URL: http://odin.dep.no/html/nofovalt/depter/md/publ/acid/AcidRainE.html

Unpolluted rain has a pH of roughly 5.6, but there are natural variations. Acid rain and snow, with a pH of about 4.4, has fallen in southern Norway for many years, causing serious environmental damage in many areas. History of the problem.

[ eng ]

Acid Rain - English
URL: http://www.ns.ec.gc.ca/aeb/ssd/acid/acidfaq.html

Despite progress in recent years, acid rain remains a significant environmental and economic concern for many regions of Canada. This section explains what acid rain is, where it comes from, and what it's effects are.

[ eng ]