一些生态学家和工程建筑专业人员认为,过量开采地下水是造成今年九月十九日墨西哥大地震的原因之一。墨西哥城原是一个湖,后来湖水干涸。一三二五年建立的这座城市到本世纪正在向地震层沉陷。墨西哥城有一千八百万居民,六万家工厂,用水量很大,其中大部 Some ecologists and construction and construction professionals believe that over-exploitation of groundwater is one of the reasons for the September 9, 2008 earthquake in Mexico. Mexico City was originally a lake, and later the lake dried up. The city, set up in 1925, is sinking into the seismic floor by this century. Mexico City, with 18 million inhabitants and 60,000 factories, consumes a lot of water, most of them