![]() ![]() ![]() The UN predicts that it will grow to between 65 and 70 per cent over the next 20 years – part of a demographic process that is fundamentally changing the planet. According to Dr Joan Clos, former Executive Director of UN-Habitat, which has monitored the progress of urbanisation since 1978, the proportion has already reached more than 55 per cent and is now heading for 60 per cent. Nor are there signs of any slowdown in the growth of cities. In 2008, a significant threshold in global urbanisation was crossed when more than half the people living on the planet had become city-dwellers. 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. For almost all of human history, people have lived in small towns, villages or the countryside.
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