Progress in science and the improvement of living conditions have led to the rapid growth of the world population. Modern medicine, for example, has made it possible for babies to grow up healthily and for people to live longer. With improved living conditions, particularly in the countryside, people tend to have larger families. As a result, the world population has increased so rapidly that it has now exceeded 6 billion.

But the overgrowth of population presents a threat to the existence of human society. A large population demands a GREat deal of food supply and shelter space. However, limited productivity and scarce world resources can hardly meet the needs of the ever-increasing population. Thus, in the long run, the overgrowth of the world population will only harm mankind.

To guarantee the steady development of human society, mankind must realize the consequences resulting from fast population growth and carry out a family planning programme. Only by adopting effective measures, can human society develop steadily and have a ight future.

科学的进步和生活条件的改善有LED到世界人口的快速增长。例如，现代医学，可以使幼儿健康成长，使人们活得更长命。随着生活条件的改善，特别是在农村地区，人们往往会有更大的家庭。作为一个结果，世界人口增长如此迅速，它现在已经超过6000000000。

但人口过度增长对人类社会的存在构成了威胁。大量的人口需要大量的食物供应和住房的空间。然而，有限的生产力几乎不能满足日益增长的人口需求。因此，从长远来看，过多的世界人口将会危害人类。

为了保证人类社会的稳定发展，人类必须意识到人口迅速增长所造成的后果，并开展计划生育。只有采取有效措施，人类社会才能稳步发展，有一个光明的未来。