2050年世界变成这样：人口激增(组图)

非洲儿童

　　Population Decrease and Increase 人口增减

　　There are two features in the growth of world population. First, the annual increase in population in 15 European countries, in the past few years, has been only 300,000. The United Nations estimates that by 2050, the population of European countries will decrease from the current 0.72 billion to 0.63 billion. Second, the population in developing countries is growing rapidly. Over the past 50 years, the rate of increase in population has been fastest in the least developed countries. By 2050, the population of Africa is expected to reach 1.8 billion, 0.9 billion more than its current population.

　　世界人口增长有两个特点。首先，在过去的几年中，欧洲15个国家每年仅增加人口30万。联合国预测，到2050年，欧洲人口将由目前的7.2亿下降到6.3亿。其次，发展中国家人口正快速增长。在过去50年里，最不发达国家的人口增长率最高。到2050年，非洲总人口将达到18亿，比目前多9亿。