Many major coastal cities are experiencing local land subsidence where underground soil and rock collapse, causing the surface above to sink.
We map out Africa’s population density, spotlighting the continent’s most populous countries and cities.
This animation shows big changes in the world's most populous cities over the next 80+ years. Africa alone will hold 13 cities bigger than NYC by...
Rapid urbanization is creating a vastly different world. These maps show the world's fastest growing cities, as well as how things have chanced since 1950.
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