This book provides incentives for further development of sustainablefuel cycles through a novel and interdisciplinary approach toan Earth science-related topic. The main focus is on geochemicalconcepts in immobilizing, isolating or neutralizing waste derivedfrom energy production and consumption. The book also addressesthe issue of using some types of energy-derived waste as alternativeraw materials. Moreover, it highlights research on how certainwastes can be used for energy production, an increasingly importantaspect of modern integrated waste management strategies. Themain objectives are to: (a) identify the most serious environmentalproblems related to various types of power generation and associatedwaste accumulation; (b) present strategies, based on naturalanalogue materials, for the immobilization of toxic and radioactivewaste components through mineralogical barriers; (c) discussmodern procedures for reuse of waste or certain waste components;and (d) review the importance of geochemical modelling in describingand predicting the interaction between waste and the environment.