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small sclae artisinal gold mining

reducing mercury pollution from artisanal

about 20 of the world's gold is produced by the artisanal and small-scale gold mining sector

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although many miners use mercury in artisanal and small-scale gold mining many artisanal and small-scale miners are achieving high rates of gold recovery

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mercury-free small-scale artisanal gold mining

industrial gold mining to small-scale artisanal gold mining clean tech mine offers a safer more efficient and environmentally

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