The document discusses the history, incentives, and policy considerations around oil shale development in the United States. It notes that the largest oil shale resources are located in Colorado, Utah, and Wyoming, containing an estimated 1.8 trillion barrels of oil. However, oil shale has not proven economically recoverable. The document outlines the geology of oil shale and different production technologies. It discusses past federal efforts to develop oil shale as well as incentives and barriers to development, such as high costs, competing with imported oil, and regulatory issues.