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topic---acid-rain-pollution-and-politics.html
topic---acid-rain-pollution-and-politics.html
http://www.cbc.ca/archives/categories/environment/pollution/acid-rain-pollution-and-politics/topic---acid-rain-pollution-and-politics.html
Acid rain
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topic---acid-rain-pollution-and-politics.html
http://www.cbc.ca/archives/categories/environment/pollution/acid-rain-pollution-and-politics/topic---acid-rain-pollution-and-politics.html