Open-pit gold mines obliterate the landscape (opening up vast craters, flattening or even
inverting mountaintops) producing 8 to 10 times more waste than underground mining.
- Cyanide is used to separate gold from ore. Cyanide pollution is a major concern. A rice-grain
sized dose of cyanide can be fatal to humans; concentrations of 1 microgram (one-millionth of a
gram) per liter of water can be fatal to fish.
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