Between 1981 and 2009 in the United States, the annual average of fire deaths ________ and the annual average economic damage to structures due to fires ________.
A. decreased; increased
B. decreased; decreased
C. increased; increased
D. remained flat; decreased slightly
E. increased; decreased
Answer: A
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Many types of mining, such as for coal and copper, produce a specific type of water pollution called ________
A) acid drainage B) eutrophication C) suspended limestone particles D) chlorinated pesticides E) radon gas
The future worldwide use of irrigation
A) is expected to double in the next 20 years due to increasing demands for food. B) is limited by the availability of freshwater, waterlogging, and salinization of soils. C) depends on new technologies to extract more groundwater. D) will require increased reliance on new hydrogen technologies to produce freshwater.
Which of the following climates characterizes the regions of the Earth's rainforests?
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