城市规划从未停止(Urban planning never stops)

巴塞罗那繁华的城市街道似乎是纪念世界人口日的最佳场所。我们中越来越多的人正前往城市。据估计，2007年是城市人口比农村人口多的第一年。如果目前的趋势继续下去，到2050年，大约三分之二的世界人口将生活在城市。由于电网、供水、公共交通和应急服务都将捉襟见肘，城市规划者和政府官员将需要对这一快速增长做出解释。
原文：
The bustling city streets of Barcelona seem as good a place as any to mark World Population Day. More and more of us are heading to the city. It’s estimated that 2007 was the first year in which more people lived in cities than in rural areas. If current trends continue, by 2050 about two-thirds of the world population will be living in cities. City planners and government officials will need to account for this rapid increase as power grids, water supplies, public transit, and emergency services will all be stretched.
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