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While Ghanaian laws state that only locals can perform small scale mining many Chinese workers in the past made use of a grey area claiming they offered technical assistance The mines would employ locals to operate big machines and serve as guards The Chinese would often be employed to wash gold from filtered soil

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In industrial scale mining operations heavy equipment is brought in to clear the area completely and move the soil Dump trucks are filled with dirt from the riverbanks which is then dropped into a large sluice Hoses are used to filter the soil and separate the tiny gold flecks from the rocks and clay The sluice acts like a sieve to break up

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The study reviewed information on the rainforests of Suriname French Guiana Guyana Brazil Ecuador Peru Colombia Venezuela and Bolivia and demonstrated that between 2024 and 2024 approximately 1680 km2 of tropical forest was lost in South America as a result only of small scale gold mining

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The Romans used hydraulic mining methods on a large scale to prospect for the veins of ore especially a now obsolete form of mining known as hushing They built numerous aqueducts to supply water to the minehead

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