White Gold: Discovering Bhutan's natural treasure

ABC News' Bob Woodruff travels to Bhutan, a carbon-negative nation battling climate change along its rapid flowing rivers. SUBSCRIBE to ABC NEWS:    / abcnews   Watch More on http://abcnews.go.com/ LIKE ABC News on FACEBOOK   / abcnews   FOLLOW ABC News on TWITTER:   / abc   GOOD MORNING AMERICA'S HOMEPAGE: https://gma.yahoo.com/