News Main Animals Archaeology Dinosaurs Earth History Human Animal Space Tech   AP Photo/Kirsty Wigglesworth |   The Greenest Energy? Living algae is displayed in towers at the science museum in London. NASA scientists have proposed a new way to produce biofuel -- using algae -- that sanitizes waste water, removes carbon dioxide from the air, and doesn't compete with agriculture for land or water. | Discovery News Video   « back to article

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