When that occurs, a person wearing a protective full-body suit and a breathing mask enters the chamber and swims through tons of human waste to tie a cable to the top of the pump so it can be lifted and everything filtered out.

• 人体废弃物在某种程度上是有毒的，所以在“游泳者”身上会附有几个警告器，以便在空气对生命有威胁时做出警告。