Energy can be neither created nor destroyedbut it can be wasted. The United States wastes two-thirds of its energy, including 80 percent of the energy used in transportation. So the nation has a tremendous opportunity to develop a sensible energy policy based on benefits and costs. But to do that we need factsnot hyperbole, not wishful thinking. Mara Prentiss presents and interprets political and technical information from government reports and press releases, as well as fundamental scientific laws, to advance a bold claim: wind and solar power could generate 100 percent of the United States’ average total energy demand for the foreseeable future, even without waste reduction.
To meet the actual rather than the average demand, significant technological and political hurdles must be overcome. Still, a U.S. energy economy based entirely on wind, solar, hydroelectricity, and biofuels is within reach. The transition to renewables will benefit from new technologies that decrease energy consumption without lifestyle sacrifices, including energy optimization from interconnected smart devices and waste reduction from use of LED lights, regenerative brakes, and electric cars. Many countries cannot obtain sufficient renewable energy within their borders, Prentiss notes, but U.S. conversion to a 100 percent renewable energy economy would, by itself, significantly reduce the global impact of fossil fuel consumption.
Enhanced by full-color visualizations of key concepts and data, Energy Revolution answers one of the century’s most crucial questions: How can we get smarter about producing and distributing, using and conserving, energy?
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About the Author
Mara Prentiss is Mallinckrodt Professor of Physics at Harvard University.
Table of Contents
Introduction: U.S. Energy Use-Past, Present, and Future 1
I Foundations of a Renewable Future
1 Overview of Renewable Energy 27
2 Electric Power for a Renewable Future 50
II Renewables Are Enough
3 Electricity from Water 77
4 Electricity from Wind 91
5 Electricity from the Sun 139
6 Combining Renewable Energy Sources 155
III Energy Links
7 Distributing Electricity 167
8 Conserving Energy 182
9 Storing Energy 231
10 Consequences of Consuming Energy 256
Conclusion: A Renewable Future 295
Appendix A Carnot Efficiency 307
Appendix B Electricity from Heat 319
Appendix C Recommended Steps toward a Renewable Future 336