For the first time in human history.

• Position: NEWS & TRENDS - City population trends - Brief article

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FOR THE FIRST TIME IN HUMAN HISTORY, more people Live in cities than n rural areas. But this doesn't necessarily mean that they're living better lives. More than a billion people one third of the world's city dwellers--live in slums like this one in Mumbai, India (where Slumdog Millionaire takes place). Defined by the United Nations as having inadequate access to sanitation and clean water, poor structural quality of...