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An Air Quality Index reading of 105 means the air quality is considered


A) good,posing little or no risk to sensitive groups.
B) acceptable for all but the most highly sensitive groups.
C) unhealthy for sensitive groups,including older adults and children.
D) very unhealthy for all people,resulting in a public health alert.

E) B) and C)
F) All of the above

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World population is increasing at the approximate rate of 75 million people per


A) week.
B) month.
C) year.
D) decade.

E) B) and D)
F) None of the above

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Which of the following about the earth's polar ice caps is TRUE?


A) By 2030,the polar ice could melt away completely during the summer months.
B) Since 2007,there has been less polar ice melting than there was from 2000 to 2006.
C) Experts now believe that polar ice melting will not be a problem for future generations.
D) Polar ice melts help to stabilize global weather patterns.

E) B) and C)
F) A) and D)

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Biomagnification occurs when larger animals eat smaller animals.

A) True
B) False

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Alec has graduated from college and is moving to a large city to start a new job. Once he arrives, he plans to buy his first new car. Because he has asthma and is concerned about the effects of air pollution, he wants to consider environmental factors in his choice of vehicle and in his driving habits. He also wants to avoid asthma-related health problems associated with air pollution. -Which of the following is likely to emit the lowest amount of greenhouse gases?


A) an SUV
B) an HEV
C) a conventional midsize car
D) a conventional compact car

E) A) and B)
F) A) and C)

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Which of the following is NOT a factor that directly affects population control?


A) fertility rates
B) habitat destruction
C) death rates
D) availability of family planning

E) B) and C)
F) A) and D)

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Kelly is concerned about protecting her town's water supply.List and describe seven recommendations related to that goal.

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The Air Quality Index measures the


A) level of carbon monoxide over the previous ten days.
B) deterioration in the ozone layer.
C) concentration of five air pollutants of concern to health.
D) amount that visibility is diminished by smog.

E) A) and C)
F) All of the above

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When toxic or potentially toxic substances build up in the food chain,the process is called


A) vector transmission.
B) biomagnification.
C) bioloading.
D) radiation sickness.

E) All of the above
F) B) and C)

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Surface water is likely to be contaminated with both organic matter and pathogenic microorganisms.

A) True
B) False

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Most of the world's energy comes from nonrenewable sources.

A) True
B) False

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Gamma radiation causes cancer,sterility,and chromosomal damage at low exposure levels.

A) True
B) False

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Which of the following does NOT contribute to air pollution?


A) forest fires
B) battery-driven golf carts
C) blooming flowers
D) dust storms

E) B) and D)
F) All of the above

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The most obvious depletion of the ozone layer has occurred over


A) AntarcticA.
B) the United States.
C) the equator.
D) Africa.

E) C) and D)
F) B) and D)

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Biological pollutants are often found in bathrooms,damp basements,and humidifiers.

A) True
B) False

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The form of radiation that poses the most serious risk to human health is ______ radiation.


A) microwave
B) infrared
C) gamma
D) X-ray

E) All of the above
F) A) and B)

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A long-term health threat associated with polychlorinated biphenyls (PCBs) is


A) arthritis.
B) mental retardation.
C) cancer.
D) birth defects.

E) A) and D)
F) C) and D)

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The disease that is most likely to increase in incidence because of the thinning of the ozone layer is


A) lung cancer.
B) lymphoma.
C) skin cancer.
D) leukemia.

E) A) and B)
F) A) and C)

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The greenhouse effect is related to


A) acid rain.
B) global warming.
C) ecological homeostasis.
D) smog.

E) A) and B)
F) B) and C)

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The field of environmental health grew out of efforts to control communicable disease.

A) True
B) False

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