most populated cities in the world 1950 to 2021

#citites This video shows a comparison of population among the global cities in 1950 to 2021. Most cities are located in Asia and North America, namely in China, India, the United States, and Japan. The population is based on the urban agglomerations of each city. An urban agglomeration is an urban area, or built-up area, is a human settlement with a high population density and infrastructure of built environment. Urban areas are created through urbanization and are categorized by urban morphology as cities, towns.