61.  A great deal of fresh water is polluted and can not be use .

62.  The living use, industrial use and other use of fresh water is increasing at a high speed.

63.  If we all realize the importance of fresh water and make good use of it, it can contribute our society a lot.

64.  Second, rapidly advancing industry takes up quite a considerable proportion of fresh water in use.

65.  But most important of all, people must pay more attention to the use of fresh water.

66.  Then, we will make better use of water and make a better world.

67.  As the population on the earth increases, the use of fresh water also follows to increase.

68.  Moreover, industries make use of fresh water in large quantities, especially in producing paper mills, textile factories.

69.  Human beings have to treasure them and make full use of them.

70.  Even some people think that there is enough fresh water to use for ever.