🌆 Lesson 27: Biggest Cities

A megacity usually means an urban area with more than 10 million people. Tokyo, Delhi, Shanghai, Dhaka, Sao Paulo, Cairo, Mexico City, and Mumbai are examples of enormous urban regions.

Cities grow where there are jobs, ports, rivers, roads, universities, factories, government, safety, and opportunity. People move to cities because cities concentrate services and money.

Tokyo is one of the largest urban areas on Earth. It works because of dense neighborhoods, rail networks, planning, technology, and a culture of public order. A huge city can still feel organized.

Many of the fastest-growing cities are in Africa and Asia. Lagos, Kinshasa, Dhaka, Nairobi, and many Indian cities are growing as young populations, migration, and economic change reshape the world.

Big cities can create traffic, pollution, high housing costs, inequality, water pressure, waste problems, and stress. A city is not successful only because it is big. It must be livable.

Cities pull people in because they offer possibility. The larger a city gets, the more it can attract businesses, schools, hospitals, artists, builders, restaurants, and migrants.