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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 bright future.

科学的进步和生活条件的改善导致了世界人口的快速增长。举例来说，现代医学已经使婴儿健康地成长并为人们生活的时间更长成为可能。随着生活条件的改善，特别是在农村，人们往往会有更多的家庭。结果，世界人口增长如此迅速，现在已经超过了6000000000。

但人口过分增长对人类社会生存的威胁。大量的人口需要大量的食物供应和住房空间。然而，有限的生产力和稀缺的世界资源几乎不能满足日益增长的人口的需求。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，人类必须实现快速的人口增长所导致的后果，并实施一个计划生育方案。只有采取有效措施，人类社会才能稳步发展，有着广阔的前景。