联合国贸易发展委员会：2025年世界城市化前景报告-摘要（英文版）

For the first time, the 2025 edition of the World Urbanization Prospects presents population estimates and projections for three “Degree of Urbanization” categories: cities, towns and rural areas.4 • In 1950, city living was relatively unusual: just 20 per cent of the world’s 2.5 billion people lived in cities, defined as population centres with at least 50,000 inhabitants and a density of at least 1,500 people per km2 . Following many decades of urbanization, cities are now (in 2025) home to