Which item is not included in solid waste according to the given material?

• A. Manures and crop residues that can be returned to the soil as fertilizer.
• B. Industrial solvents used in manufacturing.
• C. Solid or dissolved material in domestic sewage.
• D. Construction debris.

Answer: (A)

The item not included as solid waste is manure and crop residues that can be returned to the soil as fertilizer. These materials are used directly to improve soil fertility and are treated as a beneficial resource rather than discarded waste, so they’re excluded from the solid waste category. In contrast, industrial solvents when discarded, sewage solids/sludge, and construction debris are typical examples of solid waste because they are wastes that require disposal or treatment.