what could be the health hazards of untreating sewage before disposal ?
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describe the working population categories please help
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Sewage and wastewater
Sewage and wastewaterIf sewage is only partially treated before it is disposed of, it can contaminate water and harm huge amounts of wildlife. ... Contamination of water sources can cause diseases to spread, such as e-coli, diarrhea and hepatitis A. Even properly treated sewage can have its problems.
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