"No water, no creatures". Water is very important for man.

Man can live for about 7days without any food, 

about 3 days without water. But water pollution in the whole world

is becoming more and more serious.

Waste water produced by a chemical factory is being discharged into the river.

The river is not so clear as before. Water quality is very bad. 

So people must pay more attention to this problem,especially the government.

To protect water resource is to protect our life.