A Hundred years ago, the largest city in the world was London, with a population of 6.5 million. Today it is dwarfed by Tokyo. With barely a quarter the population of London a century ago, Japan’s capital city has since mushroomed to 34 million, propelling it to pole position in the global city league table. This rural to urban migration can now be seen in scores of cities across the globe. And it has brought us to a pivotal moment in human history. In 1900, most people lived in the countryside, with a little over 10 per cent of the world’s population living in cities. From next year, the UN Population Division predicts that for the first time in history, more people will live in cities than in the country, and the biggest growth will be in “megacities”, with populations over 10 million.
Site – http://www.newscientist.com