Algae fuel, also called algal fuel, algaeoleum or third-generation biofuel,[1] is a biofuel which is derived from algae. During photosynthesis, algae and other photosynthetic organisms capture carbon dioxide and sunlight and convert it into oxygen and biomass. Up to 99% of the carbon dioxide in solution can be converted, which was shown by Weissman and Tillett (1992) in large-scale open pond systems.
Does not answer the question, which is: is it profitable or not .