Environmental Science: Question Preview (ID: 28167)


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Unequal food distribution leads to malnutrition and starvation despite adequate worldwide food production
a) True b) false c) both d) none
Grains account for a little more than one-half of the food Calories produced yearly.
a) true b) false c) none d) both
When a chemical manufacturing company develops a chemical, extensively tests it, discovers it to be unsafe, and never brings it to market, it is following the
a) actual-risk probability principle. b) precautionary principle. c) risk-management principle d) risk assessment and management principle.
Malathion is an insecticide that is fairly widely used in the United States, with a half-life in the environment of 1 day. If 100 grams of malathion are released into the environment, about how much will remain after 4 days?
a) 100 g b) 50 g c) 50 g d) 6.25 g
The nuclear accident at Chernobyl in 1986 has provided scientists with data on the effects of radiation on humans. This study of radiation sickness and thyroid cancers would be best classified as a(n)
a) chronic study. b) acute study. c) retrospective study. d) prospective study.
Human wastewater results in which of the following water-pollution problems? I. The organic matter decomposes and reduces dissolved oxygen levels. II. Decomposition of organic matter releases great quantities of nutrients. III. Pathogenic organisms a
a) I only b) II only c) I and III d) I, II, and III
What is the first step of treating wastewater at a municipal sewage treatment plant?
a) Use of bacteria to break down organic matter b) Solid waste material settles out c) Disinfection using chlorine or ozone d) Water is removed from sludge
The United States legislation that empowers the EPA to establish maximum contaminant levels in drinking water is the
a) Clean Water Act. b) Superfund Act. c) Clean Air Act. d) Safe Drinking Water Act.
Natural sources of air pollution include all of the following except
a) forest fires. b) volcanic eruptions. c) waterfalls. d) conifer trees.
The beneficial ozone is ____ and the dangerous ozone is ____.
a) O2; O3 b) O3; O2 c) tropospheric; stratospheric d) stratospheric; tropospheric
Which of the following molecules is NOT considered a greenhouse gas?
a) Carbon dioxide b) Ozone c) Nitrogen d) Chlorofluorocarbon
Which of the following can be considered reasonable hypotheses to explain the recent trend in warming of surface temperatures globally? I. If greenhouse gas concentrations increase in the troposphere, then surface temperatures will increase. II. If t
a) I b) II c) II and III d) I, II ,and III
Which of the following gases is the greatest overall contributor to the greenhouse effect?
a) Carbon dioxide b) Methane c) Ozone d) Chlorofluorocarbons
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