The document discusses the challenges of energy dependence and climate change, and the potential for renewable energy technologies like solar PV, CSP, wind, and geothermal to address these issues at a large scale. It outlines the status and improvement potential of various renewable technologies, as well as the policy, economic, infrastructure, and workforce developments needed to enable a renewable energy future. Barriers and opportunities related to grid integration, materials supply, capital investment, and human resources are also examined.