81.  Resource of fresh water became very short .

82.  Pollution became more and more serious, it let much fresh water not be able to use .

83.  In one hand, we should be aware of the importance of fresh water and we should save to use fresh water.

84.  In the other hand, the government should establish law to control the birth of people and pollution, it can protect the rosure of fresh water .

85.  I believe we shouldn't face with the lack of fresh water if we know how to protect the fresh water.

86.  In daily activities of modern society, people often think that the fresh water on the earth is very much .

87.  So many think we can get fresh water at anytime and anywhere.

88.  However, the fact is otherwise, with the increase of population, the need of fresh water is becoming large .

89.  At the same time the development of agriculture and industry need more fresh water.

90.  Then, we should make it clear that the fresh water can't meet our needs completely.