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.

Focusing on World Megacities: Demographia World Urban Areas, 2021

Extreme Air Pollution in Global Megacities

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

GAPS-megacities: A new global platform for investigating persistent organic pollutants and chemicals of emerging concern in urban air - ScienceDirect

Impacts of Megacities on Air Quality: Challenges and Opportunities

World Population Density Map Update with GHSL 2023 – CityGeographics

World Population Density Map Update with GHSL 2023 – CityGeographics

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

Here Come the Megacities

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

Strength and weaknesses: A comparison of Beijing with four Bemajor metropolises

Megacities and climate change – A brief overview - ScienceDirect