在人类历史发展的过程中,人口问题始终是社会经济发展中的重要内容。公元初,世界人口只有1.5亿。到1600年为5亿,1900年达16亿,1965年为30亿,1979年44亿,1988年已满50亿。现在世界人口每年增长2%,即约增加1亿人,大体上不到35年就增加一倍。如果照此情况下去,预计到本世纪末世界人口将达到70亿(美国调查局统计为63亿)。据测算,到2600年,人口就要增长到630亿。到那时,每一个人只能占有地球的 In the course of the development of human history, the population issue has always been an important part in the social and economic development. In early AD, the world’s population was only 150 million. 500 million in 1600, 1.6 billion in 1900, 3 billion in 1965, 4.4 billion in 1979 and over 5 billion in 1988. Now that the world’s population has grown by 2% a year, or about 100 million people, it has roughly doubled in less than 35 years. If this is the case, the world population is projected to reach 7 billion by the end of the century (6.3 billion U.S. Bureau of Investigation statistics). It is estimated that by 2600, the population will have to grow to 63 billion. Until then, everyone can only occupy the earth