This book presents topical research in the study of energy management. Topics discussed include power management using electrolytic hydrogen; the design of a fuzzy decision-making system for energy management and comfort conditions using wireless sensor networks; using Jatropha biodiesel as a prospective renewable resource for energy management; the relationship between CO2 emissions and the energy sources mix in OECD countries; electricity consumption and economic growth in Brazil and atomic nanotechnology promotions in the energy industry.