. "2. A Framework for Thinking About the Hydrogen Economy." The Hydrogen Economy: Opportunities, Costs, Barriers, and R&D Needs. Washington, DC: The National Academies Press, 2004.
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The Hydrogen Economy: Opportunities, Costs, Barriers, and R&D Needs
FIGURE 2-1 U.S. primary energy consumption, historical and projected, 1970 to 2025. SOURCE: EIA (2003).
FIGURE 2-2 U.S. primary energy consumption, by sector, historical and projected, 1970 to 2025. SOURCE: EIA (2003).