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Globally,commercial fishing is chiefly concentrated


A) in the deepest areas of oceans far away from coasts.
B) in freshwater lakes.
C) in tropical areas where waters are comparably stagnant.
D) on continental shelf areas where cold and warm waters mix.

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

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Energy is


A) the random motion of molecules.
B) either potential or thermodynamic.
C) a force that is exerted over some distance.
D) the ability to do work.

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

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Brazil is a world leader in producing ethanol from sugarcane for blending with gasoline as an automobile fuel.

A) True
B) False

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Commercial forests can be considered a renewable resource if _______________ techniques are practiced.


A) selective cutting
B) sustained yield
C) clear cutting
D) multiple use

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

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Which of the following statements about nuclear energy is NOT true?


A) Some countries depend much more than others on nuclear power.
B) In theory,nuclear fuels could provide a virtually inexhaustible source of energy.
C) Nuclear fission plants produce large amounts of radioactive waste.
D) Environmental opposition has stopped all consideration of constructing new plants.

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

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Discuss three methods of using other nonrenewable resources to augment declining supplies of oil and natural gas.For each method,make reference to potential environmental or cost considerations.

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The methods the student may choose to di...

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In contrast to Canada and Mexico,the United States consumes far more oil than it produces.

A) True
B) False

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The more resources a country has,the higher its level of technology and quality of life.

A) True
B) False

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Which of the following is not one of the designated purposes for which the U.S National Forests are managed?


A) recreation
B) timber production
C) wildlife habitat
D) all of the above are purposes for which they are managed

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

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The rise in oil prices during the 1970s was due chiefly to a cutback in production by industrialized countries.

A) True
B) False

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Which of the following is NOT an example of a perpetual renewable resource?


A) solar energy
B) wind power
C) geothermal energy
D) fish

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

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The largest of the commercial forest belts in the world includes


A) most of Australia,Africa,and South America.
B) the upper-middle latitudes of the Northern Hemisphere.
C) the Arctic region of Russia and Canada.
D) the western interiors of continents in subtropical latitudes.

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

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Explain why average gas mileage of new automobiles in the U.S.is now lower than it was in the late 1980s.

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As the gas prices were going down or sta...

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The evaporation of irrigation water from farm fields can damage soil fertility through


A) soil erosion.
B) deforestation.
C) desertification.
D) salinization.

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

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