1.  Wanting to know the world better, we can refer to some public media, such as TV, newspaper or radio, from that, we can get many information we need, we also can search for help from some social service department .

2.  And on the other hand, scientists are trying to search for better source of fresh water.

3.  Scientists are searching any ways to reuse the waist water and prevent the polution to water from increasing.

4.  It can help us to control the fresh water shortage, but save is not enough, now scientists are busy searching a good method to produce water, that is to clean the used water for reuse in this system, we won't use up our fresh water .

5.  Finally, we can search other sources of water like sea water or man-made water.

6.  At last , I thought we should search for the new source with the moden scientist .

7.  Second, we should search new water resourse .

8.  Scientists have searched the answer for many year and get several way .

9.  In searching for the treasure house of knowledge, only these who are not afraid of difficulties will reach the heights of science eventually.

10.  Because they are fond of still and stable life, and they hate to be busy in searching new job every some time.