An arborloo is a temporary, shallow, dry composting pit latrine constructed of locally available, cheap materials. Once the arborloo is full, the temporary structure is easily moved to another location and a tree planted in the well-manured hole. This treats faeces as a resource rather than a waste product. The latrine has led to reduced open defecation, fewer water-borne diseases, and encouraged people to plant trees in their homes.
Portable boat toilets are another innovation. The human waste collected is emptied into a bio-gas digester, energy from which is being used to provide lighting.
Read the full story by UNEP here.