各地的用水量都在上升，人类已经在使用54%的江湖淡水和地下水，一些人估计这个比率到 2025年将达到70%。

The World Health Organization estimates that more than forty-million people have the disease. More than ninety-five percent of these people live in poor and developing countries.

Everywhere, water use is increasing. Humans already use fifty-four percent of all the fresh water found in rivers, lakes and underground. There are some estimates that this rate will reach seventy percent by two-thousand- twenty-five.