With contributions from more than 300 esteemed researchers and practitioners in the field, this encyclopedia presents nearly 200 topics related to the generation, production, consumption, and conservation of power, heat, and lighting. It covers energy efficiency and conservation opportunities, renewable and alternative energy sources, the financial analysis of energy systems, performance contracting, environmental regulations, global climate change, green development, hydrogen-fueled vehicles, and much more. Sponsored by the Association of Energy Engineers (AEE), the comprehensive and timely material in this dynamic resource provides precise information that can make a difference in today’s quest for energy efficiency.