diffuse pollution is part of ...
diffuse pollution is part of the whole of the organic matter rejected by the human body. the nitrate is component urine, but it also comes from part of the destruction of the fecal matter by the micro organizations. the pollution is dangerous at the moment when it is in strong concentration as in this case with the latrines and the collective cleansing. The cleansing such as it is currently practiced has big problems: concentration of multiple pollution and the transformation of the fecal matter into mud.