Commentary: Keep our rivers wild

The rivers of Chilean Patagonia cascade from snow-capped mountains through sheer rock facades and rolling hills, radiating bright turquoise, deep blues and vivid greens. The Puelo. The Pascua. The Futaleufú. Each is as breathtaking and unique as the landscape it quenches.But these rivers, like many worldwide, have been threatened by dam projects that aim to provide power for distant cities and mining operations. Only one-third of the world’s 177 longest rivers remain free flowing, a