Developed by Swedish architect Anders Wilhelmson who told the New York Times “Not only is it sanitary, they can reuse this to grow crops.” Once used, the bag can be knotted and buried, and a layer of urea crystals breaks down the waste into fertilizer, killing off disease-producing pathogens found in feces.

In the developing world, an estimated 2.6 billion people, or about 40 percent of the earth’s population, do not have access to a toilet, according to United Nations figures. It is a public health crisis: open defecation can contaminate drinking water, and an estimated 1.5 million children worldwide die yearly from diarrhea, largely because of poor sanitation and hygiene.

Wilhelmson plans to sell the bags for two or three cents each