Explain water related problems.

•About 40% of the world population lives in arid or semi-arid (place where temperature is high and rainfall is less) regions.

•The people residing in such areas spend lots of money in making availability of water which is to be used for drinking, in agriculture and in industries.

•Over-exploitation of water resources is resulting in lowering the water levels in the river; lakes and ponds.

•As a result of this, the surrounding wet land also dries up.

•Over-exploitation of ground water to meet the increasing demand has resulted in lowering of the ground water table level.