For the world as a whole, population is expected to continue to grow by another 2.5 billion people from 2005 to 2050. All of that growth will be in the developing world: 1.3 billion more people in Asia, 900 million more in Africa, the rest in Latin America and other regions.
全世界总的来说，到2050年，人口数量将在2005年数量的基础上再增加25亿。所有增加的人口将都在发展中国家：亚洲将增加13多亿人口，非洲将增加9亿人口，剩下的在拉丁美洲以及其它地区。