NASA is developing a method to grow large quantities of oil-producing freshwater algae that are deployed inside bags offshore near where sewage is dumped. The algae can then be converted into biofuel. The OMEGA system uses the energy of the ocean's waves to have algae in the bags feed on sewage, and it releases cleansed water into the ocean through forward osmosis. Nevada-based Algae Systems, which has licensed the NASA technology, plans to operate algae bioreactors off the coast of Tampa, Fla.

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