Lanz, Walter (1 december 2001). ”Hydrogen Properties”. U.S. Department of Energy. College of the Desert. http://energy.gov/sites/prod/files/2014/03/f12/fcm01r0.pdf. ”On this basis, hydrogen’s energy density is poor (since it has such low density) although its energy to weight ratio is the best of all fuels (because it is so light).”
David Z. Morris. "Why Japan wants to transform into a 'hydrogen society'Arkiverad 2016-04-04" Fortune (magazine), 21 October 2015. Quote: "Unlike gasoline, solar, or nuclear, hydrogen isn’t an energy source—just a method of energy storage. “Hydrogen is an energy carrier in the same sense that electricity is,” says David Keith"
David Z. Morris. "Why Japan wants to transform into a 'hydrogen society'Arkiverad 2016-04-04" Fortune (magazine), 21 October 2015. Quote: "Unlike gasoline, solar, or nuclear, hydrogen isn’t an energy source—just a method of energy storage. “Hydrogen is an energy carrier in the same sense that electricity is,” says David Keith"