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Key greenhouse gases include all of the following,EXCEPT


A) helium.
B) carbon dioxide.
C) chlorofluorocarbons.
D) methane.

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

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Hearing damage can occur after eight hours exposure to sounds louder than:


A) 60 decibels.
B) 70 decibels.
C) 80 decibels.
D) 90 decibels.

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

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Kelly is concerned about protecting her town's water supply.List and describe seven recommendations that will accomplish her wishes.

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1. Implement strict regulations on indus...

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Electronic items,batteries,and fluorescent lights should be disposed of in the regular trash.

A) True
B) False

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Which of the following statements is TRUE regarding environmental health?


A) It has focused on preventing infectious diseases spread by water,waste,food,rodents,and insects.
B) It encompasses all the interactions of humans and their environment and the health consequences of these actions.
C) Environmental pollutants contribute not only to infectious diseases but chronic diseases.
D) All of these statements are true.

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

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It is predicted that a 10 percent decrease in ozone levels would result in a rise in nonmelanoma skin cancer of _____ percent.


A) 13
B) 26
C) 39
D) 50

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

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Areas where asbestos is most likely to be found include all of the following,EXCEPT:


A) ceramic tile.
B) boiler wraps.
C) furnaces.
D) ceiling insulation.

E) A) and C)
F) None 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) A) and C)
F) B) and D)

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Which of the following is TRUE regarding Canadian water systems?


A) No Canadians have died from contaminated water in the last 10 years.
B) Hazardous chemicals from manufacturing do not infiltrate water systems in Canada.
C) In most areas of Canada,water systems supply adequate,dependable,and safe water.
D) Water shortages are not a concern in the Canada.

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

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Sanitary landfills are primarily used to dispose of


A) radioactive waste.
B) solid waste.
C) sewage.
D) recyclables.

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

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A naturally occurring radioactive gas found in soils,rocks,and building materials is:


A) carbon dioxide.
B) radon.
C) hydrogen.
D) ozone

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

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What is the process by which organic substances are broken down naturally by living organisms?


A) biodegration
B) recycling
C) septic systemization
D) organic oxygenation

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

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Exposure to ________ can cause headaches,chronic bronchitis,dizziness,fatigue,and death.


A) environnemental tobacco smoke
B) formaldehyde gas
C) carbon monoxide
D) asbestos

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

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The key pollutant in smog is nitrogen dioxide.

A) True
B) False

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Levels of atmospheric greenhouse gases are rising because of


A) combustion of fossil fuels.
B) water pollution.
C) acid rain.
D) the destruction of the ozone layer.

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

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Greenhouse gasses result in a warming of the earth.

A) True
B) False

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Jane lives in a province in which the legislature is considering a bill (AB 175)that would allow new roads to be built through a wilderness area.Proponents support the measure because it would allow greater access for recreation and the harvesting of more trees from nonprotected areas that are now difficult for large trucks to reach.Opponents state that the plan will endanger the ecosystem and its wildlife through habitat destruction from road-building and from increased human use and logging.Jane wishes to write her local representative about this issue.Choose a position,and draft a brief letter that follows the guidelines suggested in your text.

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What percentage of the world's fresh water is available for human use?


A) 1
B) 2
C) 5
D) 10

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

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You can conserve energy by doing all of the following,EXCEPT


A) cutting back on driving.
B) making sure your home is well-insulated.
C) planting and caring for trees.
D) using fluorescent tubes for lighting.

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

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Which of the following statements is FALSE regarding air pollution?


A) Research has linked exposure to air pollution to reduced birth weight in infants.
B) Air pollution occurs with every pollen bloom.
C) Increased population growth,especially in urban areas,concentrates the problem.
D) Nuclear energy seems to be the solution to air pollution.

E) None of the above
F) All of the above

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