But,unlike city sewage, this waste sits in lagoons and is spread untreated on farm fields as fertilizer.

VOA: standard.2010.05.06

Separating our water supply from sewage and learning how to do wastewater treatment was a really important part of reducing infectious diseases.

把净水和污水分开,以及学会污水处理的方法,是减少感染性疾病传播方法中的重要部分

耶鲁公开课 - 生物医学工程探索课程节选

Thirty years ago, lobsters flourished around the sewage dumped at the edge of the harbor.

VOA: standard.2010.07.20

Osman says other concerns include sewage,unregulated restaurants, and the use of all-terrain vehicles for recreation.

VOA: standard.2010.08.05

Sewage from more than a million people dumps directly into the lakes.

VOA: standard.2009.12.16