出典:Wikipedia
出典:『Wikipedia』 (2011/07/06 06:05 UTC 版)
A tree bog is a form of outside toilet which has willows, nettles and other nutrient-hungry plants planted around it. The fæces are held in a chamber open to the air which allows it to decompose rapidly, feeding the trees around it. Unlike a conventional compost toilet, a tree bog should never need emptying. Effectively, it is a system for converting human fæces to biomass.