51.  We should acquire not to wasting fresh water in dialy life, control the growth of the population, protect fresh water from being polluted and try to find a way to get fresh water from the sea.

52.  At first, we must limit the use of fresh water mostly so as to protect the limited source.

53.  On the other hand, everyone should protect fresh water from being polluted, and value any drops of fresh water.

54.  We also must protect rivers from being polluted.

55.  Secondly, we should call on people not to waste water, and protect the water resources.

56.  The second, we should protect the source of fresh water, discrease water polution .

57.  Facing this stuation , we should try to protect the rare fresh water.

58.  After that, we shall protect water from polluting .

59.  Secondly, we don't make enough way to protect water, plenty of fresh water has been polluted .

60.  We must do something about protecting fresh water.