Foreword vStudy Panel viiiPreface ixReport review xiiiAcknowledgements xvExecutive Summary xvii1. The sustainable energy challenge 12. Energy demand and efficiency 193. Energy supply 574. The role of government and the contribution of science and technology 1235. The case for immediate action 145AnnexesA. Study panel biographies 165B. Acronyms and abbreviations 169C. Common energy unit conversion factors and unit prefixes 171D. List of boxes, figures, and tables 173