Miners use mercury for the rudimentary gold smelting process, releasing - as another study shows - up to 1,000 tons of chemicals into the air every year. Mercury is also poured into the waterways of the area, and studies carried out in 2008 on the Kahayan River found traces of mercury in quantities greater than double the Indonesian standard (1000 ng / l) useful for classifying a watercourse as drinkable.
read more... https://blog.rapusia.org/green_living/1030/kalimantan-devastating-pollution-from-the-wild-gold-mining/
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