NYC, Tokyo, Delhi: These maps chart the growth in area and population of 20 megacities

Today there are more than 30 cities with a population over 10 million. Fortune charts how the most populous urbanized areas have changed since 1990.

Here Come the Megacities

Mapped: Where The World's Biggest Megacities Will Be in 2030

The World's New Megacities: Developing countries will dominate megacity growth over the next two decades - Vivid Maps

Animated Map: The 20 Most Populous Cities in the World by 2100

International Collaborative Research: “Smart Global Mega Cities” and Conclusions of Cities Case Studies Tokyo, New York, Mumbai, Hong Kong-Shenzhen, and Kolkata

Projecting future populations of urban agglomerations around the world and through the 21st century

The changing PM2.5 dynamics of global megacities based on long-term remotely sensed observations - ScienceDirect

Chart: The World's Next Megacities

International Collaborative Research: “Smart Global Mega Cities” and Conclusions of Cities Case Studies Tokyo, New York, Mumbai, Hong Kong-Shenzhen, and Kolkata

Focusing on World Megacities: Demographia World Urban Areas, 2021

Extreme Air Pollution in Global Megacities