The mismanagement of human waste is a serious health problem for the 2.6 billion people who don't have regular access to toilets. In fact, in the slums of Kenya, waste management is so haphazard that residents dispose of feces-filled plastic bags by simply flinging the bags away without concern about where they land. And it was discovering those flying sacks of waste that inspired Anders Wilhelmson to invent the PeePoo, a chemically treated toilet bag that sterilizes human waste and converts it to fertilizer, all for only two or three cents.