Energy sustainability of countriesEnergy sustainability of countries Κεφάλαιο σε Βιβλίο Book Chapter 2018-10-092017enThe provision of adequate, reliable, and affordable energy, in conformity with social and environmental requirements is a vital part of sustainable development. Currently, countries are facing a two-fold energy challenge: On the one hand they. should assure the provision of environmentally. sustainable energy, while, on the other, energy services should be reliable, affordable, and socially acceptable. To evaluate such aspects of energy services one needs energy sustainability barometers, which provide the means to monitor the impacts of energy policies and assist policymakers in relevant decision making. Although sustainability is an ambiguous, complex, and polymorphous concept, all energy sustainability barometers incorporate the three major sustainability dimensions: Social, economic, and environmental. In this chapter, we review three models for assessing the sustainability of energy development of countries: ESI, SAFE, and EAPI. We also present a brief discussion of the results, the applied methodologies, and the underlying assumptions of these sustainability barometers. http://creativecommons.org/licenses/by/4.0/Renewable and Alternative Energy: Concepts, Methodologies, Tools, and Applications Grigoroudis Evangelos Γρηγορουδης Ευαγγελος Kouikoglou Vasilis Κουϊκογλου Βασιλης Yannis Phillis Φιλλης Ιωαννης IGI Global Sustainable energy