Tree bog

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<!-- this article is nearly a copy/paste from the single referenced external link, except where I've just cleaned up the carefree misinformation Feb 2009 -->

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.


The tree bog was invented by Jay Abrahams of Biologic Design in the UKafter he observed that the trees around the place where fæces were deposited were particularly vigorous. Tree bogs can be considered examples of permaculture design.

The tree bog is a simple method of composting wastes, and since its introduction by Biologic Design in 1995 over 500 tree bogs have been built in Britain. They have been on sites ranging from fruit farms and pick-your-own enterprises, campsites and an angling lake to annual festival sites, remote/low impact dwellings holiday cottages and churches.

A tree bog can be created, even if one is connected to municipal mains, but wishes to lower one's environmental impact by reducing the amount human waste and the volume of blackwater reaching treatment facilities.

The tree bog has attracted the attention of NGOs and aid workers who hope to develop its potential for shanty towns or refugee camps - anywhere that...
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