71.  He must drink wash things, etc.

72.  We always think that fresh water is too much to use: Rain-water , river-water ..

73.  But in fact, fresh water is limitted around us.

74.  Because more and more people are born, much fresh water industry needs, and so surious polution is, we have had not so much fresh water than we need .

75.  As it goes on as it has been before, we'll be sure can't get enough fresh water, then there'll be many problems in our live .

76.  We can get fresh water by other way too.

77.  For example, we can clean sea-water into fresh water, use our intellgient get fresh water we can get .

78.  At present, many people think we have frest water in quality , they think the fresh water don't use up in the end .

79.  It is well known that the rain, river water and so on, is fresh water.

80.  On our earth, It is shortage of fresh water, with the population and water used in the factory increasing .