1.  With the increased population, more and more people share in the limited fresh water.

2.  In a word, we should value the limited fresh water.

3.  There is too many people depend on those limited water resources.

4.  Facing these problem , we should do many things to the limited fresh water.

5.  Secondly, in the long run, men should purify sea water in advanced ways so as to make up for the shortage of limited fresh water resource on the earth.

6.  The limited fresh water is getting shorter and shorter.

7.  Because we can not live without fresh water, we must take steps to protect our limited fresh water resource.

8.  They don't understand to protect the limited water resource.

9.  First of all, everyone who want our future bright should put the limited fresh water to good use.