Among forested areas in the South American country, ponds and pits dot the landscape left over from the gold mining industry. These small bodies of water have low oxygen, which allows mercury — a leftover toxic chemical from gold mining processes — to be converted into methylmercury, which is even more toxic.
read more... https://www.courthousenews.com/peru-gold-mining-is-increasing-wildlife-exposure-to-mercury/
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