Sewage treatment希望采纳，谢谢
Sewage disposal
sewage treatment
pollute the environmentbe harmful to health Waste Sorting recycle of newspapers and glassedharmful litter processingWaste water treatmentlaw making
污染环境，environment pollution有害健康，be harmful to health垃圾分类，classification of the garbage报纸、玻璃的再利用，recycling of the newspaper and glasses有害垃圾的处理，disposal of harmful garbage废水处理，disposal of wasted water制定法律 make laws
deal with the wasted water
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