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True/False
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True/False
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Multiple Choice
A) Globally, they stabilize the climate because they take up carbon dioxide.
B) They provide shade and reduce the need for fans and air conditioning.
C) In forests, they exert a natural "sponge effect" for the provision of freshwater.
D) They break down dead organic matter and other types of wastes.
E) They retain soil and prevent soil erosion.
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Essay
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Multiple Choice
A) 20 times
B) 10 times
C) 5 times
D) 3 times
E) 2 times
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Multiple Choice
A) herbicide contamination
B) mercury contamination
C) pesticide contamination
D) lead contamination
E) PCB contamination
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Multiple Choice
A) medical use
B) food
C) consumptive use
D) ecotourism
E) agricultural use
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Essay
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View Answer
Multiple Choice
A) modestly increasing.
B) dramatically increasing.
C) negative.
D) leveling off.
E) stable.
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Multiple Choice
A) drive an energy-efficient car
B) eat more beef
C) live in a smaller home
D) turn down the thermostat in the winter
E) refrain from watering the lawn
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True/False
Correct Answer
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True/False
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Multiple Choice
A) flowing water
B) solar energy
C) hydrogen gas
D) steam
E) hot salt
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Multiple Choice
A) land
B) solar energy
C) fossil fuels
D) minerals
E) oil
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True/False
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Essay
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View Answer
True/False
Correct Answer
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True/False
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Multiple Choice
A) They are all involved with the biogeochemical cycles.
B) They are all pervasive benefits provided by ecosystems.
C) They provide pleasure and relaxation for humans.
D) They all depend on an individual species.
E) They all undo some harm that humans have done.
Correct Answer
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