: While there were only two megacities (populations over 10 million) in the 1950s—New York and Tokyo—there are now 34 , a number expected to reach 43 by 2030. Challenges for the New Century
: More than 4 billion people —over 56% of the global population—currently live in cities. The Urbanization Revolution: Planning a New Age...
: The UN predicts that the urban population will grow by another 2.5 billion by 2050, reaching approximately 68% of the world's population. : While there were only two megacities (populations