FrontMatter -- Acknowledgments -- Contents -- Tables and Figures -- Executive Summary -- 1 Introduction -- 2 A Framework for Thinking About the Hydrogen Economy -- 3 The Demand Side: Hydrogen End-Use Technologies -- 4 Transportation, Distribution, and Storage of Hydrogen -- 5 Supply Chains for Hydrogen and Estimated Costs of Hydrogen Supply -- 6 Implications of a Transition to Hydrogen in Vehicles for the U.S. Energy System -- 7 Carbon Capture and Storage -- 8 Hydrogen Production Technologies -- 9 Crosscutting Issues -- 10 Major Messages of This Report -- References -- Appendixes -- Appendix A Biographies of Committee Members -- Appendix B Letter Report -- Appendix C DOE Hydrogen Program Budget -- Appendix D Presentations and Committee Meetings -- Appendix E Spreadsheet Data from Hydrogen Supply Chain Cost Analyses -- Appendix F U.S. Energy Systems -- Appendix G Hydrogen Production Technologies: Additional Discussion -- Appendix H Useful Conversions and Thermodynamic Properties.