说明：  A communal refuse pit is simply a pit dug near the community compound and filled with general refuse. The pit should not be located close to a water source, because toxic chemicals could leach into the water. The disposal site itself should be fenced off to prevent access by scavenging animals. At the end of the day, new waste should be covered with a layer of clean soil 0.1 metre deep. When the pit is full, the waste should be covered with a final layer of soil to prevent flies from breeding.