A survey of electrotechnologies and their status is presented here. Principles of operation and significant applications, both current and potential are outlined, and an assessment is made wherever possible of the selected topics. Many of the technologies and processes discussed are in their infancy and development stages. Some have developed and are developing rapidly, while all show great future promise. Rapid progress is being made in numerous industrial and environmental applications. The electrotechnologies identified in the volume have been selected for evaluation based on their potential impact in key industrial sectors and implications for industrial energy patterns. The objectives of this book are twofold: To identify and describe the range of industrial and environmental applications of electrotechnologies. To identify those applications that have potential for commercialization and that are likely to affect energy consumption patterns.