Tailings - the slurry of water, finely ground rock, ore and chemical byproducts washed away during the mining process - never quite go away. The same goes for the risk of failure for even the best-engineered "tailings impoundment" dams, environmental experts say on the heels of an environmental catastrophe this week in B.C.
from CBC | Latest News News http://ift.tt/1uugkah
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