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1908 map of Piraeus, the port of Athens, showing the grid plan of the city

A city is a large and permanent human settlement.<ref name="Goodall">Goodall, B. (1987) The Penguin Dictionary of Human Geography. London: Penguin.</ref><ref name="Kuper and Kuper">Kuper, A. and Kuper, J., eds (1996) The Social Science Encyclopedia. 2nd edition. London: Routledge.</ref> Although there is no agreement on how a city is distinguished from a town in general English language meanings, many cities have a particular administrative, legal, or historical status based on local law.

Cities generally have complex systems for sanitation, utilities, land usage, housing, and transportation. The concentration of development greatly facilitates interaction between people and businesses, benefiting both parties in the process, but it also presents challenges to managing urban growth.<ref>{{#invoke:citation/CS1|citation |CitationClass=book }}</ref> A big city or metropolis usually has associated suburbs and exurbs. Such cities are usually associated with metropolitan areas and urban areas, creating numerous business commuters traveling to urban centers for employment. Once a city expands far enough to reach another city, this region can be deemed a conurbation or megalopolis. In terms of population, the largest city proper is Shanghai, while the fastest-growing is Dubai.<ref>The Travel & Tourism Competitiveness Report 2007, Jennifer Blanke, World Economic Forum</ref>

City sections
Intro  Origins  Geography  History  External effects  Distinction between cities and towns  Global cities  Inner city  21st century  See also  References  External links  

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