By 2025, the Chinese city of Shenzhen will be home to more than 12 million people. In 1950, it was a fishing village with only 3,148 citizens.
In India, Delhi is growing at 79 people per hour, Mumbai at 51. In China, Shanghai expands by 51 new citizens an hour.
London and New York are growing at a rate of 9 and 10 people per hour.
(via The Guardian)