1.Population means the number of people living in a particular area.

2 the population of the world does not stay the same.

3.At the moment it is growing at an increasing rate.

4.In fact,scientists believe that the world population will increase until 2020,and then stop growing.

5.However,things are not the same in all parts of the world.

6.At present in many Western industrial countries the population is falling.

7.This happens because families are small,and health conditions are good.

8.In developing countries,on the other hand, the population is rising sharply.

9.In Ghana,for example,most families have several children.

10.They earn money and look after their parents in old age.