61.  People believe that the fresh water can be taken endless .

62.  Of course there is a lot of fresh water such as rain water, river water, well water and so on.

63.  All this fresh water seems to be enormous nowadays.

64.  In fact the fresh water is very short.

65.  First, the increasing population needs more and more fresh water to meet the social lives.

66.  Finally, most our fresh water are polluted by human being himself.

67.  First, we should try our best to save the fresh water.

68.  Finally, government should pass laws to punish the industrys which have polluted the fresh water.

69.  We should keep some fresh water for ourself and our latter generations .

70.  Fresh water is important to human being .