聯(lián)合國(guó)人口專家預(yù)測(cè)，2008年，世界城市人口總數(shù)會(huì)首次超過(guò)農(nóng)村人口，孰優(yōu)孰劣？
Soon, more of us will be living in cities than in rural areas. Population experts at the United Nations had thought that would happen by this year. Lately their estimate is that in 2008, for the first time in history, more than half of the world population will be in urban areas. The United Nations …