<Tr> <Td> 46 </Td> <Td> Nagoya </Td> <Td> </Td> <Td> Japan </Td> <Td> Asia </Td> <Td> 10,070,000 </Td> </Tr> <P> The term "megacity" entered common use in the late 19th or early 20th centuries; one of the earliest documented uses of the term was by the University of Texas in 1904 . Initially the United Nations used the term to describe cities of 8 million or more inhabitants, but now uses the threshold of 10 million . </P> <P> In 1800, only 3% of the world's population lived in cities, a figure that rose to 47% by the end of the twentieth century . In 1950, there were 83 cities with populations exceeding one million; by 2007, this number had risen to 468 . The UN forecasts that today's urban population of 3.2 billion will rise to nearly 5 billion by 2030, when three out of five people will live in cities . This increase will be most dramatic on the least - urbanized continents, Asia and Africa . Surveys and projections indicate that all urban growth over the next 25 years will be in developing countries . One billion people, almost one - seventh of the world's population, now live in shanty towns . In many poor countries overpopulated slums exhibit high rates of disease due to unsanitary conditions, malnutrition, and lack of basic health care . By 2030, over 2 billion people in the world will be living in slums . Over 90% of the urban population of Ethiopia, Malawi and Uganda, three of the world's most rural countries, already live in slums . </P> <P> By 2025, Asia alone will have at least 30 megacities, including Mumbai, India (2015 population of 20.75 million people), Shanghai, China (2015 population of 35.5 million people), Delhi, India (2015 population of 21.8 million people), Tokyo, Japan (2015 population of 38.8 million people) and Seoul, South Korea (2015 population of 25.6 million people). In Africa, Lagos, Nigeria has grown from 300,000 in 1950 to an estimated 21 million today . </P>

Does the majority of the world's population live in cities
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