Microalgae have in recent times fascinated substantial attention worldwide, due to their massive application potential in the agriculture, animal nutrition, aqua culture, renewable energy, biopharmaceutical, and nutraceutical industries. For growth, microalgae utilize nitrates and phosphates from municipal wastewater and other industries. Microalgae have been consumed by humans since thousands of years. Microalgae are not fully studied crop to produce dietary foods. Microalgae can cultivate

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... ly with limited resources as compared to the traditional crops and produce more yield compared to terrestrial crops. The enervation of renewable source of energy and wastewater treatment are one of the concerning issues for the growing population. Microalgae are wealthy supply of supermolecules called protein and bio-active components, provided one more health benefit. Microalgae has been constructed with an emerging next generation group of unicellular photosynthetic organisms with the ability to handle immediate industrial and agricultural challenges. The tremendous organic variety of microalgae may be leveraged to supply a large quantity of natural or genetically modified precious biomolecules. Microalgae moreover own a fixed of intrinsic advantages, along with low manufacturing costs, very little requirement for arable land, and fast cultivation capacity in both outside structure and with fully controlled photobioreactors. Microalgae have a sizable capacity to transform atmospheric carbon dioxide to valuable commodities such as lipids, carbohydrates, and other biologically active metabolites. The present review describes the potential use of microalgae for agricultural applications, human nutrition, animal nutrition and aqua cultures.