Largest Urban Agglomerations, 1975, 2000, 2025

Source: United Nations, World Urbanization Prospects: The 2007 Revision.
Read about Urbanization at: http://www.prb.org/Educators/TeachersGuides/HumanPopulation/Urbanization.aspx

Largest Urban Agglomerations, 1975, 2000, 2025