How to save a pristine valley

As the helicopter lifted off and disappeared into the clouds, the roar of the whirring blades fell away and all that was left was the sound of the rain.I just had been deposited deep inside Cochamó Valley, a remote cathedral of towering granite in central Chile that was at the center of a decade-long conservation battle.I wanted to see this land for myself and hear firsthand from the people who had saved it. Now,…