Global urbanization has been increasing for several thousand years. The United Nations Population Fund said in 2008 that there are now more people living in cities than in rural areas, and this trend is far from slowing. The world population is expected to increase by 2.5 billion people between 2007 and 2050, by which time two thirds of the inhabitants of the countries of the South will live in cities. By 2030, cities with at least one million inhabitants will be home to almost 27% of the world's population. Cities provide a variety of health benefits, including huge markets with a steady supply of food, economies of scale, reliable public services, and a population of educated people who support business, l education and innovation.
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