Also: H2, biohydrogen
Hydrogen is a clean fuel that can be made by algae and by splitting water. It is also studied as a medical antioxidant.
Readiness: lab lab studies · prototype demonstrated objects · commercial products or buildings in real use · review summaries of other studies.
Ohsawa and colleagues found inhaled hydrogen selectively reduced harmful oxygen radicals in rats.
As reported in: Ohsawa, Ishikawa, Takahashi et al. (2007). Hydrogen acts as a therapeutic antioxidant by selectively reducing cytotoxic oxygen radicals. Nature Medicine. doi:10.1038/nm1577
Abstract only
Melis and colleagues got green algae to produce hydrogen gas for days by starving them of sulfur.
Built / tested: biohydrogen
As reported in: Melis, Zhang, Forestier et al. (2000). Sustained Photobiological Hydrogen Gas Production upon Reversible Inactivation of Oxygen Evolution in the Green Alga <i>Chlamydomonas reinhardtii</i> . Plant Physiology. doi:10.1104/pp.122.1.127
Turner reviewed routes to producing hydrogen sustainably.
As reported in: Turner (2004). Sustainable Hydrogen Production. Science. doi:10.1126/science.1103197
Abstract only
Schlapbach and Züttel reviewed materials for storing hydrogen in vehicles.
As reported in: Schlapbach, Züttel (2001). Hydrogen-storage materials for mobile applications. Nature. doi:10.1038/35104634