111.  Rain, river , well and so on are the sourse of fresh water.

112.  If we use up the fresh water on the earth, rain will fall down and we will have water again or we can dig a well and get the fresh water under the earth.

113.  In fact fresh water on the earth is very short.

114.  So the amount of fresh water consumption is increasing too.

115.  With the development of industry fresh water consumption in industry is more than before.

116.  The most worst is that many factories give out waste water and the waste water pollute the fresh water in our earth.

117.  It is very seriously that it is shortage of fresh water on earth.

118.  We must make a law to prevent the behaviors in polluting fresh water.

119.  And every one of us should save the fresh water of our world and make our world more better !

120.  People always take it for granted that fresh water can't be used up.