This 2-volume encyclopedia is organized alphabetically, with articles written in a clear, concise manner. Each article is thoroughly cross-referenced to related articles and enhanced with illustrations. The Encyclopedia contains articles that are related to petroleum, natural gas, coal, oil shale, and biofuels. Each article is related to the relevant product property and use, as well as the various environmental issues associated with it. However, rather than a conglomeration of general articles, the focus is on the paths that the fuel science and technology will take during the 21st Century. The Encyclopedia provides a handy reference that offers valuable information and direction for the industry. In all articles where possible, the various aspects of process chemistry and engineering are enhanced and expanded to give as comprehensive a coverage as possible.