In 2007, for the first time, half the world’s population lives in cities. By 2030, the urban population will reach 5 billion - 60 per cent of the world’s population. Nearly all population growth will be in the cities of developing countries, whose population will double to nearly 4 billion by 2030 – about the size of the developing world’s total population in 1990.

Read the whole article here and give us your views.