在巴黎这座流光溢彩的城市地下,有一处常被忽视的旷世工程,它就是被誉为“城下之城”的巴黎下水道。现在很难想象,数百年前,巴黎卫生状况之差简直惨不忍睹:街区没有公共厕所,人们随地大小便;拉车的牛、马肆意排泄……由于缺乏排污设施,民众把街道和广场当成垃圾场,厨余等生活废弃物随 In the underground city of Paris, there is a rare project that is often overlooked. It is the Paris sewer known as the city under the city. It is hard to imagine that hundreds of years ago, the difference in the health conditions in Paris was simply horrible: there were no public toilets in the neighborhood, people took the place and urinate; the cows and horses in the cart pulled out... In the absence of sewage discharge facilities, people used the streets and squares as garbage. Field, kitchen waste and other domestic waste