In this lecture given at the RMI Quest for Solutions event in 2003, Amory Lovins presents an argument for hydrogen as the next major supplier of energy. Hydrogen is versatile, clean, safe, and cheap. The widespread use of hydrogen and fuel cell vehicles would enable a profitable transition from oil. Also, in a hydrogen economy, America’s energy needs can be met from local and national sources. Lovins responds to myths about hydrogen, provides basic facts about hydrogen, and explains how it can be used in automobiles.