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
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
Point-source pollution_________. ()
A. affects the nearby area around the source
B. are relatively easier to control
C. is difficult to control
D. affects far away places
Water pollutants can be divided into _________. ()
A. chemical pollutants
B. biological pollutants
C. radiological pollutants
D. physical pollutants
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