(B) The process of treating wastewater by municipalities in cities is known as $Sewage$ $treatment$. This process involves physical,chemical,and biolo

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(B) The process of treating wastewater by municipalities in cities is known as $Sewage$ $treatment$. This process involves physical,chemical,and biological methods to remove contaminants from wastewater,primarily using microbes to break down organic matter in $Sewage$ $Treatment$ $Plants$ $(STPs)$.