Instead of being dumped into a nearby river or lake, sewage is sent through a system of underground pipes to agiant tank where the water is separated from the solid waste material.

• 废水不再被倾倒进附近的河流和湖泊里，而是通过一个底下管道系统被送入一个大水箱，在那里，水和固体废弃物被分离开来。