引言据推测,全球人口将以每月550万人的速度增长,城市化率将会加速,大约将从2008年的50%增长到2050年的70%。据联合国估计,到2050年,全球城镇人口将增加到5.2亿人。鉴于此,城市及其支撑城市居民生活生计、城市经济和环境的关键职能将面临内在的不确定性,给城市带来巨大压力,因为人口增加会消耗城市更多的食物、水和物资等资源,并使城市对水和能源更加依赖。由此产生的水、空气和土地 Introduction It is speculated that the global population will grow at a rate of 5.5 million per month and the urbanization rate will accelerate, from about 50% in 2008 to 70% in 2050. The United Nations estimates that by 2050, the global urban population will increase to 520 million. Given this, cities and their key functions that support the livelihoods, urban economy and environment of urban residents will be subject to inherent uncertainties that will put heavy pressure on the city as increased population will consume more resources in cities such as food, water and supplies And make cities more dependent on water and energy. The resulting water, air and land