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...Journal of natural sciences research www iiste org issn paper online vol no algal multipurpose benefit iyasu gudisa field fishery limnology and aquatic ecotoxicology college computational science department biology madda walabu university ethiopia po box summary algae are the mass groups photosynthetic agent that able to contribute variety food component oxygen for planet review emphasized on benefits as a result several finding reviewed be informed about different purposes many findings agreeing potential regulate environment by reducing concentration corbondioxide releasing organism s respiration aeration decompose pollutant into usable nutrients also ascertain us importance increase crop production fixing nitrogen biomass in agricultural fields enhance high change gas utilizable form they have indicate environmental pollution treat wastes pollutants contain all essential amino acids iodine vitamins b niacin carotene minerals while presence heavy metals is negligible used extracts co...