![]() ![]() Two thirds of today's megacities are in developing countries, most of them in East and South Asia. In 2015 there will probably be almost 60.In 1950 the world had only four cities with population greater than 5 million.Other definitions only include cities with a single dominant centre ( Bronger 1996, Kraas 2003).īecause of the fact that international statistics are not based on similar areas of reference, the figures given for the size of cities and megacities are generally not comparable but are used as the only available ones. Furthermore these agglomerations have a minimum level of population density (at least 2,000 person/km 2). Megacities are defined as high-density metropolis with a population of over 5 million ( Bronger 1996), more than 8 million ( UN 1987), or more than 10 million inhabitants ( Mertins 1992).
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