December 11, 2012 1:26 AM

Commentary: Gold rush is poisoning Peru's rain forest

As our plane topped the Peruvian Andes, I looked out the window and caught my first view of the headwaters of the Amazon. The green canopy of the rain forest spread out in all directions. Yet on closer examination, I noticed the wilderness was marred by a checkerboard of cleared fields, scarred stream banks and rivers stained brown by polluted runoff.

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