21.  Second, we should deal with the polluted water before flowing into the river so that we can protect our water.

22.  Third, the polluted water has polluted other fresh water, such as river and lake .

23.  In the other hand, we should use the techenolege to reuse the polluted water.

24.  We must take steps to clean the polluted water.

25.  We will bring fresh water from polluted water in the future.

26.  We must control the industrial polluted water, clear it with some advanced technicals and recycle it.

27.  We all know that factories make a lot of polluted water which is sent to revers and makes it unfit to drink.

28.  Finally, we can make the polluted fresh water clean again.

29.  we should realize the gravity and come up with some effective strageries to that problem, reinforce the protection of our fresh water, clean polluted water .

30.  The discharge of polluted water, air, the pollution of the rivers, seas etc, many of them are not caused by people who have no money.