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目前世界各国人口普遍有日益增长之趋势。1920年世界人口只有18亿多,1970年增至36亿多,几乎增长一倍。若按目前每年2％的增长率来估算,预计到2000年,世界人口将达70亿。控制人口增长速度已成为国际上一个非常关注的问题。为此,已由联合国世界卫生组织负责国际计划生育工作,1974年曾邀请45个国家有关科学家参加,共同制订了研究规划。1977年已扩大到64个国家,我国也是
At present, the population of all countries in the world is generally on the rise. In 1920, the world’s population was only 1.8 billion, doubling from 3.6 billion in 1970 to almost doubling. If we estimate at the current 2% annual growth rate, it is estimated that by the year 2000, the world’s population will reach 7 billion. Controlling the rate of population growth has become a very concerned issue in the world. To this end, the United Nations World Health Organization has been responsible for international family planning work, in 1974 invited 45 countries involved scientists to jointly develop a research plan. It has expanded to 64 countries in 1977 and in our country as well