Images from the Book
These are the images from this chapter of Environment: An Interdisciplinary Anthology
Figure 23.3 |
Figure 23.4 |
Figure 23.5 |
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| Figure 23.3: Fuel use and real GNP per year. | Figure 23.4: Productivity per worker-hour (as measured by real value added per worker-hour) and fuel use per worker-hour in the U.S. manufacturing sectors from 1909 to 1980. Fuel use includes fossil fuels and electricity. Background shows factory workers c. 1900. Photo courtesy of the National Park Service, Edison National Historical Site. | Figure 23.4: (top) Ratio of output per unit fuel (tons per kilocalorie) used by extractive sectors of the U.S. economy; (bottom) Net energy return (EROI) over time for U.S. fossil fuel sources. |