Energy conservation in the United States ________
A) can be achieved through personal actions and more efficient technologies
B) can be accomplished only through changes in technological efficiencies
C) is unlikely to ever occur
D) becomes more difficult during times of war
E) can be accomplished by changes in tax laws
Answer: A
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Which of the following statements applies to the biogeophysical feedback mechanism that occurs in the Sahel?
A. Reduced cloud cover relates to an increase in both surface temperatures and rainfall. B. Reduced vegetation relates to a lower surface albedo and an increase in rainfall. C. Reduced vegetation relates to a decrease in both surface temperatures and rainfall. D. Increased vegetation relates to an increase in surface temperatures and a decrease in rainfall.
Researchers have demonstrated that organic farming ________
A) increases the incidence of invasive species B) decreased organic soil losses while giving yields comparable to conventional farming C) suppresses the biodiversity of pollinating insects, especially bees D) is only sustainable with pesticides and synthetic fertilizers E) presently has no market in Europe
One effect of colonialism is that interior cities often declined in importance to port cities
Indicate whether the statement is true or false
In the 1970s and 1980s, CFCs were widely used in ________
A) refrigerators and aerosol cans B) light bulbs and electronics C) coal-fired power plants D) snowmobiles and motorcycles