|7 min read
What is the world’s biggest city?
To an alien gazing down from space, ignoring political boundaries and just mapping contiguous areas of high population density, the answer would be clear: the Pearl River Delta, a chain of southern Chinese cities that have fused into one vast sprawl. Its population is projected to reach 73m people in 2026, just as a regional high-speed railway network, to bind it together, is due to be completed.
Sources: Worldpop; The Economist