Voice of America: For the first time this year, more people will live in cities than anywhere else on the planet. Speaking to a gathering of urban planners at the World Bank in Washington, New York City mayor Michael Bloomberg urged policy makers and the public to confront the challenges of urban life with a new vision. More than eight million people live in New York City. America’s largest metropolis will add another million residents by 2025. Mayor Michael Bloomberg told the World Bank audience that …