11.  In fact, we can pass many new laws to clean the water, and to control the rapid increase of the population in the world.

12.  Laws should be put into effect.

13.  I think the government should build some plants that do with the dirty water and should make some laws reduce the water pollution.

14.  We must take measures to bring the water pollution under control, laws should be made to prohibit the factories from dumping poisonous substance into the river.

15.  Second, we must stop poluting water by establishing laws.

16.  For example, we could apply the law to confine the increasing of population, water consumpation of industry and prevent the fresh water from polluting .

17.  When it's necessary, a plan or a law to limit the improper using of fresh water should come into power .

18.  The government's resposonbility is to make law on factories to force their pouring out waste on special place .

19.  Second, the central government should make a series of laws to prevent water pollution and protect fresh water resources.

20.  Second, laws should be passed to prevent the fresh water from being polluted.