While some varieties of algae are known to be rich in an oil that is similar to soyabean oil, algae, also produce hydrogen naturally as a part of the photosynthetic process. Scientists believe that this hyderogen could harnessed. Scientists have taken this research a step further by producing algae that produce three times as much hydrogen as natural. The technique banks on the observation that while algae at the surface of the water trap most of the sunlight, they are unable to process it. Scientists genetically modified the algae to contain less chlorophyll than normal, which allowed sunlight to pass below the surface of the water, so that it could be processed by a greater number of layers of algae, thereby producing more hydrogen.
http://www.technologyreview.com/Energy/19438/page1/
Algae promise biofuels
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