Image: Megacities - Growth in Megacities 1950-2015
Displaying image 7 of 70 images in Geography.
Source: University of Texas at Austin, Perry-Castaneda Library, Map Collection http://www.lib.utexas.edu/maps/
From Global Trends 2015: A Dialogue About the Future With Nongovernment Experts, p.29, National Intelligence Council, 2000
12 years ago.