31.  In other hand the number of popullation become bigger and bigger and people also need a lot of fresh water to drink.

32.  Now, the number of the people is bigger than the presant .

33.  Every year there are a large number of areas turn into desert because of being in short of water.

34.  In fact, in nowdays , fresh waster is very scare, because the number of human on the earth have become larger and larger, and with the increase of industry, fresh water have become less and less, and with the increase of industry, a lot of fresh water had been polluted.

35.  There are many many people in large cities and the number of the population is still increasing.

36.  With increasing the number of person and the water of many factorise using , there was used plenty of the fresh water every day.

37.  I think we should control the increasing the number of human being .

38.  In addition, with the development of industry, a large number of factories call for more and more water than ever.

39.  By estimated , the number of people will above 500,000 million by the end of this centery .

40.  There are a large number of population in the world.