Water is a resource believe to be unlimited but only recently people recognize it
as a finite resource. There are many countries that have water shortages such as
Mexico, Chile, and South Africa. In West Africa, people drink the same pond water
where mothers launder clothes and thirsty cattle drink. The water are contaminated with
guinea worm larvae and other deadly parasites. Children are dying of typhoid, cholera,
and dysentery. They are going blind from trachoma. …
