81.  With the development of industry, many factories use more fresh water than before, and these factories also give off wasted-water , so fresh water is sharply polluted.

82.  Many people believe that the fresh water on the earth is endless for man to use.

83.  Therefore , more fresh water is available for us to use.

84.  With the economic developping , the population has been increasing very quickly, more and more people use fresh water.

85.  So some people make water no use.

86.  We should make good use of each drop of water.

87.  Firstly, we should make good use of the fresh water.

88.  For these reasons, we should make good use of fresh water.

89.  Many people think that fresh water is enough to use.

90.  Then we would have enough water to use.