11.  Second, the genverment should set up a law to project fresh water, forbidden to waste fresh water.

12.  Above all, I think, we must forbbid to waste water.

13.  The waste water has been sent to the rivers so that the polluted water in the river is unfit to drink or use.

14.  And their flowing waste water pollutes nearby rivers and streams, which reduces sources of people's drink water.

15.  Second, industries should clean the waste water to flow into rivers .

16.  Moreover, more and more rivers have been polluted because some factories pour waste water into rivers without purifying them.

17.  First, we should pohibit factories to pour waste water into river .

18.  Second, we should find an efficient way to purify the waste water, so we can reuse them.

19.  Second, we should perswerade other people not to waste fresh water, at last , we should call on the society not waste water and prevent from the polution of water.

20.  For example, the chemical factories' waste water pollute the river , the brook and the other water.