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Question
Briefly explain why there can be seasonal variation in carbon dioxide concentrations in the troposphere.Answer
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Differentiate between renewable and nonrenewable natural resources. Give examples of each.
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Many permafrost soils in the Arctic are peat soils.
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Shelterbelts are to ________ as terraces are to ________.
A) wind erosion; water erosion
B) water erosion; wind erosion
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E) There is no Canadian agency charged with soil degradation, only volunteer firms funded by farmers.
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Farmer John bought a field in which soils have lots of sand particles. This suggest that this soil will have ________.
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Explain the no-till method and discuss its pros and cons.
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Discuss the factors that affect the severity of soil loss to wind erosion.
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B) encourage emigration from Africa
C) discourage emigration from Africa
D) discourage population movement into sensitive environmental areas
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Why did China institute a population control policy? How is it enforced? Why is it controversial?
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Urbanization drives TFR down.
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Malthus was responsible for ________.
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C) the concept that human population growth would lead to greater industry and prosperity through education
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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B) decreasing and sustainable
C) steady state and sustainable
D) from unsustainable to sustainable
E) rapidly increasing, moving from unsustainable to sustainable