Gold mines in Kalimantan, Indonesia: It is also one
of the most polluted places of the world. Kalimantan belongs to the
Indonesian part of the island of Borneo and is particularly known for
its gold mines. For the precious metal, many miners use mercury,
releasing over a thousand tons of toxic material into the environment
every year, polluting the groundwater.
http://www.uniworldnews.org/top-ten-most-polluted-places-in-the-world/
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