Abstract:According to 2005 United Nation Revision, the world continues to urbanize quickly. Between 2005 and 2030, the world's population is expected to increase by 1.7 billion people, from 6.5 billion in 2005 to 8.2 billion in 2030. Virtually all this increase is expected to be concentrated in urban areas. In 1950 there was just two mega-cities, New York and Tokyo, but their number had reached 20 by 2005 and is expected to rise to 22 by 2015, of which 17 will be located in developing countries.As the world entered a n… Show more
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