Pit Toilet
Adam Hart-davis/science Photo Library
Compost Privy #1
Adam Hart-davis/science Photo Library
School Latrines
Andy Crump/science Photo Library
Slum Toilets In Dhaka #1
Adam Hart-davis/science Photo Library
Slum Toilets In Dhaka
Adam Hart-davis/science Photo Library
Slum Toilet In Dhaka
Adam Hart-davis/science Photo Library
Septic Tank.
Mark Williamson
Compost Privy
Adam Hart-davis/science Photo Library