South America: Mining Raises Concerns Over Water   Luis Ángel Saavedra, 2012   Tens of thousands of protesters — many of them indigenous or campesinos — have marched from their villages to government offices in mineral-rich Argentina, Chile, Ecuador and Peru, demanding protection of the environment they depend upon, as large mining and other natural resource extraction projects in these nations are backed by their governments.   It is part of a large-scale rejection of these...

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