How a young German director documented illegal gold mining in Ghana

Can the damages on the environment be repaired?  Mercury cannot be retrieved from the rivers. When gold miners sift and wash river sand, they use mercury that amalgamates with the gold, making it easier to retrieve it from the sand. The mercury that's then combined with the gold particles is burned and the remaining liquid mercury is eliminated in rivers. Statistics claim that a third of all mercury found in the eco-system is from small-scale gold miners.
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