Valoi said that the highest incidence of illegal artisanal mining occurs in the concession areas, whose mining license holders are not using them, encouraging mining that, in turn, has very harmful effects on the environment and human health, with significant pollution of all rivers downstream of concessions and other areas with occurrence of gold.
Sergio Sacama, manager of the Chicamba dam, told the meeting that the water in the Revué River, has mercury sediments that are already negatively affecting the operation of the machines, which can affect the longevity of projects and undermine efforts to give the facility more capacity and operability.
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