Another alarming effect of the search for gold is the discharge of toxic quicksilver mercury into rivers and surrounding land, which can cause irreversible damage to the nervous systems of those who ingest it.118 Blood tests of Indigenous people residing along rivers where mining dredges operate register mercury levels far above what is considered safe.
read more... https://www.crisisgroup.org/latin-america-caribbean/south-america/brazil-colombia-peru/b51-three-border-problem
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