Despite efforts to increase renewables, the global energy mix is still likely to be dominated by fossil-fuels in the foreseeable future, particularly gas for electricity and oil for land, air and sea transport. The reliance on depleting conventional oil and natural gas resources  and the geographic distribution of these reserves can have geopolitical implications for energy importers and exporters. Global Energy Policy and Security examines the security of global and national energy supplies, as well as the sensitivity and impacts of sustainable energy policies which emphasize the various political, economic, technological, financial and social factors that influence energy supply, demand and security. Multidisciplinary perspectives provide the interrelated topics of energy security and energy policy within a rapidly changing socio-political and technological landscape during the 21st century. Included are two main types of interdisciplinary papers. One set of papers deals with technical aspects of energy efficiency, renewable energy and the use of tariffs. The other set of papers focuses on social, economic or political issues related to energy security and policy, also describing research, practical projects and other concrete initiatives being performed in different parts of the world. This book will prove useful to all those students and researchers interested in the connections between energy production, energy use, energy security and the role of energy policies.