urbanisation

An Indian child looks into a water tanker as people fill buckets during a water shortage in New Delhi, India. The shortage is affecting the Indian capital owing to the country's growing population and its increasing need for water.

Money Sharma/EPA

An Indian child looks into a water tanker as people fill buckets during a water shortage in New Delhi, India. The shortage is affecting the Indian capital owing to the country’s growing population and its increasing need for water.

The Alemao shanty town in Rio de Janeiro is viewed from the Teleferico gondola line. Brazil, the fifth largest country in the world, has seen its urban population increase to 87 per cent and forecasters predict urbanisation will hit 90 per cent by 2020 as the rural to urban migration continues. By comparison, Indis's urban population is 31 per cent, China's 50 per cent and Russia's 73 per cent according to the CIA World Factbook.

Mario Tama / Getty Images

The Alemao shanty town in Rio de Janeiro, Brazil, is viewed from the Teleferico gondola line. Brazil, the fifth largest country in the world, has seen its urban population increase to 87 per cent and forecasters predict urbanisation will hit 90 per cent by 2020 as the rural to urban migration continues. By comparison, India’s urban population is 31 per cent, China’s 50 per cent and Russia’s 73 per cent according to the CIA World Factbook.