Artisanal mining plays a key role in the wider mining sector because it can rapidly increase supply when prices rise. But it is dangerous with frequent accidents and the risk of contamination from the use of mercury, a highly poisonous substance, to recover gold particles from soil.
read more... https://www.reuters.com/article/us-tanzania-mining-artisanal-feature/gold-rush-not-for-us-say-tanzanias-small-scale-miners-idUSKBN1X90G0
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