Chapter 11 Test Bank Already Passed

Factories, sewage treatment plants and oil wells are __________ sources of water pollution. {Ans: Point}Factories, sewage treatment plants, and oil wells are __________ sources of water pollution. {Ans: point}Domestic water conservation in the United States would save about 20% of the water we now use. Therefore, we need to come up with better technology to avoid strict restrictions in the future. {Ans: false}The main reason that surface water pollution has largely decreased in the United States since 1950 is _____________________ {Ans: the Clean Water Act.}The water pollutant that most commonly threatens human health is _____________________ {Ans: pathogenic organisms.}Which would not be a principal problem that has resulted from the construction of large dams? {Ans: salinization of water bodies and surrounding soil.}In general, water use in poor countries is dominated by _____________________ {Ans: agricultural use.}Application of fertilizer to farm fields is an example of cultural eutrophication {Ans: true}Chlordane, DDT and polychlorinated biphenyls are all types of ________ {Ans: Toxic compounds}The activity that uses the greatest share of U.S. household water is _____________________ {Ans: flushing the toilet.}Tertiary treatment of sewage produces water that is NOT free of _____________________ {Ans: nutrients}Withdrawal is