" When you talk to the experts about developing new technology to provide clean drinking water for the developing world, they’ll tell you that—with four billion people making less than two dollars a day—there’s no viable business model, no economic model, and no way to finance development costs. But the twenty-five poorest countries already spend twenty percent of their GDP on water. This twenty percent, about thirty cents, ain’t much, but do the math again: four billion people spending thirty cents a day is a $1.2 billion market every day. It’s $400 billion a year. I can’t think of too many companies in the world that have $400 billion in sales a year. And you don’t have to do a market study to find out whether there’s a need. It’s water. There’s a need! "

― Peter H. Diamandis , Abundance: The Future Is Better Than You Think