Cities are the future of the world. Over half the world's population lives in cities, and by the middle of the century more than seven in 10 people will live in cities, according to the United Nations. Almost all this urban growth will take place in emerging economies.
We can see the great divide between the urban and the non-urban world. Of course, the urban countries like Brazil, Australia and the USA have huge areas of low population density. Still, manufacturing and service industries are primarily centered in urban areas.
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