The construction industry is widely known for having a significant negative impact on the environment as a result of the massive volumes of raw materials consumed and greenhouse gas emissions. Therefore, during their service life, scientists need to promote and research the environmental effects of employing alternative alternatives like fiber-reinforced polymers (FRP). Due to its longevity, great corrosion resistance, light weight, and high strength, FRPs have become more and more popular in recent years. One of the most crucial techniques for examining the effects of the FRP on the environment is life cycle assessment. The purpose of this work is to provide an overview of fiber-reinforced polymer composites used in concrete structures with an emphasis on their mechanical and environmental characteristics in structures used in civil engineering. The life cycle assessment approach is used to evaluate the environmental effect of fiber-reinforced polymers, their usage as a strengthening mechanism in concrete structural components, and their qualities. According to the literature's published findings, using FRP composites in structural members rather than conventional ones increases their strength and stiffness and lessens their environmental effect.