America's economy and lifestyles have been shaped by the low prices and ready availability of energy. In the last decade, however, the prices of oil, natural gas, and coal have increased dramatically, leaving consumers and the industrial and service sectors looking for ways to reduce energy use. To achieve greater energy efficiency, we need technology, more informed consumers and producers, and investments in more energy-efficient residential and commercial buildings, transportation, and manufacturing processes.As part of the America's Energy Future project, Realistic Prospects for Energy Efficiency in the United States examines the potential for reducing energy demand through improving efficiency by using existing technologies, technologies developed but not yet utilized widely, and prospective technologies. The book evaluates technologies based on their estimated times to initial commercial deployment, and it provides an analysis of costs, barriers, and research needs. This quantitative characterization of technologies will guide policy makers toward planning the future of energy use in America. Industry leaders, investors, environmentalists, and others will also benefit from this practical diagnosis of energy efficiency possibilities.