To date about 30,000 Peruvian small-scale miners have been
“formalized.” The deadline for doing this without legal consequences
expires in April next year.
Small miners, in particular illegal ones, use mercury to bind
together small pieces of gold, and then burn it off, releasing it into
the environment.
http://www.mining.com/devastating-cost-of-illegal-mining-in-peru-higher-than-ever-thought-government-81133/?gce_var=lower-comments&utm_expid=17625373-0.wR1isPasQ6GSvnWKGYTdqA.1
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