Book excerpt: The report discusses the linkages between energy and economic, social, environmental, and security issues, and analyses the contradictions between current patterns of use and objectives in these areas. The WEA also reviews energy resources and technology options from the point of view of sustainability including better end-use efficiency, greater reliance on renewable sources of energy, and next-generation nuclear and fossil-fuel technologies. Further, the report examines plausible scenarios for combining various options to achieve a sustainable and relatively prosperous future. The report concludes by examining policy options for producing and using energy in ways that are compatible with sustainable development.