1. For the purpose of this discussion I use the following definition of the hydrogen economy: the production storage distribution and use of hydrogen as an energy carrier.
2. Jules Verne The Mysterious Island (available at http://www.literature-web.net/verne/mysteriousisland 1874).
3. The Forever Fuel: The Story of Hydrogen 1981
4. D. Gregory, Sci. Am.228, (no. 1), 13 (January 1973).
5. Basic Research Needs for the Hydrogen Economy available at http://www.sc.doe.gov/bes/reports/files/NHE_rpt.pdf (current U.S. production is about 9 million tons of hydrogen per year).