Villagers have been alarmed for several years as cases of lead poisoning they blame on the mine have increased — especially in children. Affected people suffer from respiratory ailments and blood poisoning.
Villagers blame mine-owned cyanide pools built near the town for contaminating local ground water used for domestic and agricultural consumption. Sodium cyanide is often used in gold mining to extract ore from finely ground rock.
http://gokunming.com/en/blog/item/2751/the_human_side_of_yunnan_gold_mining
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