Clean Water. E-book. Formato PDF - 9780243749188

Clean Water. E-book. Formato PDF. Further, when the people find out that a well is filthy, that it has in it something that is rot ten, they will not drink water from it, no matter whose well it is. And even the common people have sense enough to know that paint ing the pump does not change 'the water. The way to get clean water is to keep the well clean.