Combine educational teaching discuss oneself develop and implement " Li water household " native country cultural school copies of course harvest and difficult of course actually finally.

A geographical information system containing details of household water use and sanitation in the villages was built using data obtained by a global positioning system survey.

For instance, simple filtration and disinfection of water at the household level dramatically improves the microbial quality of water, and reduces the risk of diarrhoeal disease at low cost.