A study published last Friday by the UN claims the world's urban population will rise from 3.5 million to 6 million in less than 40 years.
This, according to the UN, is going to prove most challenging to Africa and to Asia in terms of meeting the service needs for swelling populations such as this:
Africa is projected to experience a 16% rise in its urban population by 2050 - making it the most rapidly urbanising region on the plant - as the number of people living it its cities soars to 56%."
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