This book is a collection of descriptions of energy systems-past, present, and future-and of many possible and practical ways to replace fossil fuels with renewable fuels or nonfuel energy systems. All of the new systems described could lead to no-net carbon dioxide addition to our atmosphere. Using easily understandable terminology, the book describes the many energy systems, sources, fuels, conversions and usages that comprise our total energy system. Use of the information in the book could lead to new, safer power plants, new powering and fueling systems for our vehicles, and greater energy efficiency and reliability. These systems are real and practical alternatives that will replace the use of fossil fuels and stop the hemorrhaging of billions of U.S. dollars for petroleum imports. Some of these proposed systems are unusual and very recently announced. The book provides many unique and surprisingly workable, long-term answers to the growing concerns about energy, the economy, and greater energy efficiency and reliability. Adopting these new systems would significantly improve our balance of trade, our economy, our job opportunities and our technological presence. We do not have the luxury of time. The economic menace is here, now, and dangerous. If we don't act immediately, the already bad consequences could be catastrophic. Politicians and political forces will have much to do with how we deal with all types of energy related problems. For this reason there is much about politics and the ongoing battle between the federal government and private interests in the book. To ignore these powerful political forces that mostly stand in the way of technical progress and solutions to energy problems would result in an unrealistic view of our total energy situation.