Additional research must be done to ensure safety of pit latrines, new study says

Additional research must be done to ensure safety of pit latrines, new study says, MedicalXpress.com, March 22, 2013. News study estimates the number of people worldwide that rely on pit latrines and identifies some key knowledge gaps that could be addressed to keep the drinking water safe and protect the public. Matthew Polizzotto, soil science, featured.