Living in the Environment
18th Edition
ISBN: 9781133940135
Author: G. Tyler Miller
Publisher: CENGAGE L
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Question
Chapter 16, Problem 1CR
To determine
The potential for using renewable energy from the wind to produce most of the electricity used in the United States.
Expert Solution & Answer
Answer to Problem 1CR
The United States has sufficient wind potential to meet 16 to 22 times its
Explanation of Solution
A study published in the Proceedings of the U.S. National Academy of Sciences assessed that the United States has sufficient wind potential to meet 16 to 22 times its current electricity needs. According to the U.S. Department of Energy (DOE), the wind farms that are situated at the favorable sites in three states such as North Dakota, Kansas, and Texas can meet the electricity needs of the lower 48 states when a modern electrical grid is available for the distribution of the electricity. In addition, the NREL estimates that winds off the Atlantic and Pacific coasts and the shores of the Great Lakes can generate 4 times the electricity currently used in the lower 48 states and it is more than enough electricity to replace all of the coal fired power plants in the country. Many states in these regions are planning to tap into this huge energy source and thereby enhance their economies.
A study conducted by DOE in 2015 shows that the United States can generate 30% of its electricity from wind by 2030 with the continuation of subsidies from government. This can result in 600,000 jobs and lower energy bills. It can decrease the pollution in air and slow the climate change ocean acidification by decreasing the use of coal for the generation of electricity.
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Shale and siltstone volcanic ash. erosjon surfaçe limestone sandstone erosion surface pegmatite granite slate dike
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Ap
Retreating
glacier
Bedrock
Till
Stratified
drift
▲ Figure 9.7 This diagram showing common depositional landforms depicts a hypothetical area affected by ice
sheets in the recent geologic past. (Drumlin photo courtesy of Ward's Natural Science Establishment; esker photo by Richard P. Jacobs/
JLM Visuals; kame photo by John Dankwardt; kettle lake photo by Carlyn Iverson/Science Source)
Figure 9.9 is a stereogram showing a portion of the area covered by the Whitewater, Wisconsin, topographic map (Figure 9.10, page 160). Use the stereogram and the map to complete the following.
7. The streamlined, asymmetrical hills composed of till, labeled B, are what type of feature?
8. Examine the shape of the features labeled B on the map in Figure 9.10. How can these features be used to determine the direction of ice flow in a glaciated area?
9. Using the features labeled B in Figure 9.10 as a guide, draw an arrow on the map to indicate the direction of ice movement that occurred in this region.
10. What is the likely location of the outwash plain on the map? Identify and label the area "outwash plain." (Hint: Refer to Figure 9.7.)
11. Label the area covered by ground moraine.
12. What term is applied to the numerous almost circular depressions designated with the letter C?
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