1.  However, fresh water is in the situation of global shortage.

2.  The rapid increasing of population and the amount of using water in industry probably is the reason of causing the global shortage of fresh water.

3.  In the noted line , what can we do to avoid the global shortage of fresh water?

4.  If everybody realize the global shortage of fresh water and act on at once, a great deal of water will be saved.

5.  On the other hand, the increasing use of water in industry and the pollution also lead to the shortage of global fresh water.

6.  But in fact, our earth is heading for a crisis -- there is global shortage of fresh water.

7.  In fact, we have a crisis in the global shortage of fresh water.

8.  But in fact there exists a global shortage of fresh water.

9.  How to solve the problem of global shortage of fresh water?

10.  In fact, it is more and more serious of global shortage of fresh water.