Henry Moule's earth closet, patented in 1873. Example from around 1875. Rear chamber for dispensing of cover material. Henry Moule's earth closet design, 1909.<unk> s (in particular simple pit latrines) are used in developing countries in situations in which flush toilets connected to septic tanks or sewer systems are not possible or not desired, for example due to costs. Sewerage infrastructure costs can be very high in instances of unfavorable terrain or sprawling settlement patterns.<unk> s (in particular composting toilets) are also used in rural areas of developed countries, e.g. many Scandinavian countries (Sweden, Finland, Norway) for summer houses and in national parks.
Dry toilet
Composting toilet
Tao brush
Oral hygiene
Urine-diverting dry toilet
Suction 
Suction
Boil-water advisory