The great changes in the world population situation in the mid-twentieth century, the rapid world population growth and the severe consequence ensuing have aroused increasing attention from the international community and various countries.

• 二十世纪中叶世界人口形势发生重大变化，世界人口增长速度之快及其所带来的严重后果，日益引起国际社会和各国的关注。