And the hazards posed by gold miners do not stop there. Illegal small-scale mining has led to the buildup of toxins such as mercury in local soil and freshwater. Many waterways in the area have been polluted by the heavy metal, which is used in gold extraction, killing and sickening aquatic animals.
read more https://www.sustainability-times.com/environmental-protection/brazilian-tribespeople-grow-cacao-to-help-their-forests/
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