Answer:
Cleaning of water is a process of removing pollutants from water before it enters a water body or is reused. This process of waste water treatment is commonly known as sewage treatment. It takes place in-several stages. Sewer means the small pipes which carry waste water from the point of production to the main hole sewerage means the underground networks of small and big pipes which carry sewage from the point of production to the point of disposal. In this way sewage and sewerage are interlinked.
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