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Wing, Steve – Academe, 2010
Sewage sludge is composed of residuals removed from wastewater that comes from homes, hospitals, and industries. Wastewater-treatment systems are designed to remove pollutants that could contaminate public waterways. Sludge--called "biosolids" by those who produce it, spread it, and regulate it--includes these pollutants as well as…
Descriptors: Municipalities, Investigations, Sanitation, Industry