The international gold-mining industry has a long and troubling record of serious environmental damage arising from its operations, including rivers and estuaries heavily contaminated by cyanide, arsenic and other chemicals either used in processing ore or released from the ground when it is mined.
The potential implications for the Unuk River, which begins in Canada but runs for the last 40 kilometres of its course through the Alaska panhandle, have alarmed that state's residents.
http://www.thetyee.ca/Blogs/TheHook/2014/07/31/BC-Mine-Unuk-River/
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