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Question
One difficulty with the process of using hydrogen as a power source is that it ________.A) is not properly understood
B) is less efficient than fossil fuels
C) requires a fuel that is a nonrenewable resource
D) requires an energy investment to begin the process
E) has highly volatile and dangerous components
Answer
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Related questions
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Urbanization drives TFR down.
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A) the book The Population Bomb, which described the disastrous effects of human population growth
B) the idea that, without social strictures, the increase in the human population would lead to famine and war
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D) instituting fertilizer use for agriculture
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The most accurate terms describing the trend over the past 50 years in resource use for human energy and agricultural systems are ________.
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According to the IPAT model, the introduction of industrialized fisheries that use big trawlers, satellite navigation, and sonars to locate the fish ________.
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If global fertility rates remain at 2010 levels, the United Nations predicts that the world population will be approximately ________ billion in 2050.
A) 11
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B) the increased use of contraceptives
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A) Africa
B) Asia
C) Latin America
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C) coevolution
D) climax
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A) primary succession
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Briefly explain deep ecology.
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C) once roads are widened, traffic congestion decreases
D) prohibition of motorized vehicles in urban areas reduces pollution and saves energy
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What is a downside of establishing urban growth boundaries (UGB)?