A United Nations report has found that the number of megacities in the world has increased almost three-fold in the past 24 years. A megacity is defined as an urban area with over 10 million inhabitants—New York City formed...
A United Nations report has found that the number of megacities in the world has increased almost three-fold in the past 24 years. A megacity is defined as an urban area with over 10 million inhabitants—New York City formed...