The Executive Director of the UN Human Settlements Programme describes the reasons why more than half the world’s population has moved into cities and the challenges that need to be confronted to reap the benefits.For almost all of human history, people have lived in small towns, villages or the countryside. But the proportion of the world’s population living in cities has rapidly grown over the last two centuries, from 5 per cent in 1800, to 13 per cent in 1900 and 34 per cent by 1960. In...
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