Once it’s extracted, the ore is
crushed, piled into huge heaps and sprayed with cyanide,
which causes the gold to leach out of the ore. Some mines use
several tons of cyanide per day. A rice-grain sized dose of
cyanide can be fatal. The cyanide-contaminated waste ore is
usually just abandoned. To produce enough gold for a ring,
about 18 tons (20 short tons) of waste ore are created.
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