如果把二十世纪后半叶和前半叶相比,确切地说,如果拿五十至八十年代和二次大战以前相比,世界人口发展有一些新特点。人口增速从顶峰下降二次大战结束后,直到七十年代前期,世界人口增长速度越来越快,出现了人类有史以来增长最快的时期。公元元年到1000年世界人口年平均增长率 If we compare the second half of the twentieth century with that of the first half, to be exact, if we compare the 1950s to the 1980s with those before World War II, there are some new characteristics of world population development. Population growth declines from its peak After the Second World War ended, until the early 1970s, the world population grew faster and faster, with the fastest-growing period ever since. The annual average growth rate of the world population from the first year AD to the year 1000