2,6 billion people around the planet have no access to safe sanitation. It's one of the largest threats to health and development, and a serious contributor to poverty across the globe. But, turn it around and those 2,6 billion people aren't potential victims, they're clients with a need. Big business just figured that out, and they're betting that a corporate model can succeed where all the most well-meaning NGOs on the planet haven't, solving the sanitation crisis by turning it into an industry. Brown Gold follows some truly international players in the quest for the new gold and the hunt for a better world.