The main problem is the use of mercury in washing gold. Mercury is highly toxic, but mining operations have made little effort to reduce their use of it. Analysis of the waters of the Manica rivers and of the Chicamba reservoir has revealed the presence not only of mercury, but also of other heavy metals, including lead, cadmium and arsenic.
read more... https://clubofmozambique.com/news/mozambique-cip-demands-explanation-about-end-of-mining-suspension-in-manica/
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