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From The Engineer:
Associate Prof Ben Hankamer from the University of Queensland in Australia is attempting to engineer bioreactors that can produce hydrogen in a carbon-dioxide neutral process.
The solar bio-hydrogen process he is working on uses solar-powered bioreactors filled with single-celled algae to produce hydrogen from water. Algae naturally capture sunlight and use its energy to split water into hydrogen and oxygen; however, the process is not efficient enough to be commercially viable.
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