Mercury levels extremely high in areas of gold mining

Since 2009 researchers from Stanford University, working hand in hand with the Peruvian government and various Peruvian universities and NGO’s, have been studying the levels and effects of mercury in fish and people in the Puerto Maldonado, in the Amazon region of Peru, where artisanal gold mining is rife.
http://peru.cctv-america.com/mercury-levels-extremely-high-in-areas-of-gold-mining/