ALAN SIRULNIKOFF / SCIENCE PHOTO LIBRARY ALAN SIRULNIKOFF / SCIENCE PHOTO LIBRARY
Composting toilet. Composting toilet in a hut. The excrement will pass to a composting tank. Composting toilets use bacteria and heat to control the decomposition of human excrement. Such toilets do not require the large amounts of water in conventional flush toilets. The end product is an odourless humus material that can be used as a fertiliser. Photographed on Valdes Island, British Columbia, Canada.
Model release not required. Property release not required.