: More than 4 billion people —over 56% of the global population—currently live in cities.
: The UN predicts that the urban population will grow by another 2.5 billion by 2050, reaching approximately 68% of the world's population.
Rapid growth has historically outpaced infrastructure, leading to overcrowding, substandard housing, and public health risks. Today's planners face a complex web of modern obstacles: Urbanization - Our World in Data