Reinforced concrete (RC) beams are found to be affected by environmental exposures, mechanical damage, and natural aging which deteriorates their durability and their structural integrity. In my recent course work I have learned that the retrofitting with fiber reinforced polymers in particular with GFRP and CFRP has gained popularity as one of the sustainable and effective ways of improving flexural fortitude, stiffness and overall serviceability of weak reinforced concrete. The presents t investigation of the structural response of RC beam under the influence of various strengthening schemes using GFRP and CFRP. After reviewing a great deal of experimental data and analytical models, I concluded that external bonded FRP significant increases the load carrying strength, retards the first crack and the deformation remains to the service Force. On the basis of stiffness and strength efficiency, CFRP is superior to GFRP, however GFRP is more economically viable option with good improvement. This is merely the point why it's so important to choose the right strengthening scheme depending on performance aims and cost factors, which in the end promotes sustainable structural rehabilitation practices. In essence, the study reveals that the GFRP reinforcement may be adopted as an environmentally friendly alternative to steel in the corrosion-prone, marine environment to eliminate long-term repair expenses and minimise environmental footprint.