WATER, WATER EVERYWHERE AND WHEN FOUND NOT FIT TO DRINK

摘要

At no time has the world faced such an acute shortage of potable water than today. This is despite the fact that 75% of the world's surface is covered with water. Unfortunately, 97% of this water is saline and therefore undrinkable. Of the available fresh water, 2% is locked up in ice caps and glaciers. Hence there is only about 1% of water available to meet human needs.