Mass urbanization of the world’s population is an unprecedented trend worldwide. The most important reason why people are moving to cities is economic. People are moving to the cities because that’s where they can find jobs and earn money. Until the 20th century, the major source of employment, full and part-time, was farming. Now, according to recent statistics, no more than 15 percent of all jobs are connected to farming. Jobs now are being created in information technology, manufacturing and service areas, such as tourism and financing, and all of these new jobs are in or around major cities.
译文：世界人口大规模的城市化在世界范围内达到史 前例的规模。驱使人们不断涌向城市的最重要原因是经济因素。人们都涌向城市是因为在城里可以找到工作和挣钱。在20世纪以前，就业的主要途径，不管是全职还是兼职，一直都是农耕。而现在，根据最近的统计数据，只有不到15%的工作是和农业相关的。越来越多的工作产生于信息技术产业、制造业和服务行业，如旅游业和融资，而所有这些新兴工作都在大城市及其周边地区。
