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Generally, municipal solid waste includes organic wastes, paper, plastic, glass metals and other wastes. the majority of solid waste is organic waste.

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Most solid waste comes from industrial areas.

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Solid wastes means solid or semisolid, nonsoluble material such as agricultural refuse, demolition waste, industrial waste, mining residues, municipal garbage and sewage sludge.

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The biological pollutants include _________. ()

A. various microorganisms
B. viruses
C. worms
D. algae

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Water pollution caused by anthropogenic sources include _________. ( )

A. discharge of poorly-treated or untreated sewage
B. runoff from construction sites
C. acid rain caused by the industrial discharge of sulfur dioxide
D. acid rain caused by volcanic discharges

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