The International Energy Agency (IEA) is an intergovernmental organisation which acts as an advisor to 28 member countries, including the United States, in an effort to ensure reliable, affordable and clean energy for their citizens. Current trends in energy supply and consumption point to rising imports of oil and gas into OECD regions and developing Asia while the growing concentration of production in an ever smaller number of countries threatens to increase our vulnerability to supply distributions and sharp price hikes. Furthermore, in the absence of stronger policy action, rising consumption of fossil energy will drive up inexorably emissions and atmospheric concentrations of greenhouse gases, putting the world back on track for an eventual global temperature increase of up to six degrees Celsius. This book emphasises the fact that the future of human prosperity depends on how successfully we tackle the twin energy issue facing us today: securing the supply of reliable and affordable energy, and effecting a rapid transformation to a low-carbon, efficient and environmentally benign system of energy supply. This book provides a more detailed assessment of oil-supply prospects than has ever before been released by the IEA. The authors analysis demonstrates that projections of oil supply are far more sensitive to assumptions about decline rates than to the rate of growth in oil demand. This book consists of public documents which have been located, gathered, combined, reformatted, and enhanced with a subject index, selectively edited and bound to provide easy access.