For the first time in history, by the end of 2007, more than 3.3 billion people—half of the world’s population— were living in urban areas. That number was expected to swell to almost 5 billion by 2030, with most of the growth occurring in developing countries. The urban population of Africa and Asia was expected to double between 2000 and 2030, whereas that of the developed countries was projected to grow relatively little, from 870 million to 1.01 billion.

Related Subject(s): United Nations
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