Living Cultures

Saving a River from Poison

The Putumayo River is home to some of the purest water in the Amazon basin—but maybe not for long. The huge Amazon tributary forms the border between Colombia and Peru, draining from giant Amazonian forests, orchid-covered peatlands, and, most presciently, soil bearing traces of gold. But mining that gold has the unfortunate side-effect of poisoning the water with mercury.

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