In The Green Trap Ben Bova uses the McGuffin of cyanobacteria being genetically modified in order to greatly increase the production of O2, which has as its byproduct H2. The process is efficient enough to offer access to a Hydrogen economy.
Is there any work actually being done along this line? This would see to me, IMHO, as a very interesting challenge for grad students in molecular engineering.
It Comes From Albany 