Population Control 1．科学的进步和生活条件的改善导致了世界人口的迅速增加。
2．但是人口过分增长会对人类社会的存在构成威胁。
3．为了保证人类社会的稳定发展……。
Progress in science and the improvement of living conditions have led m the rapidgrowth of the world population. Modern medical science, 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 resuit, the world population has increased so rapidly that it has now exceeded 5 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,the limited productivity and scarce natural 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.
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