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Automotive industries have been a significant contributor to global warming over the last 30 years. Due to the excessive increase in environmental degradation, research has been conducted extensively in various fields to explore sustainable alternatives to IC engines. Therefore, heavy emphasis is being laid on Battery-run Electric Vehicles (BEVs) and Fuel Cell Electric Vehicles (FCEVs). BEVs are facing their own set of challenges when it comes to production, recharge time, battery capacity and net carbon footprint, among other issues. However, FCEVs offer certain new opportunities for the automobile sector to foray into a sustainable space. This study aims to review the performance of fuel cell vehicles against the parameters of economic feasibility, technological feasibility, energy efficiency. Recent developments in fuel cell research have been discussed.

The transportation sector faces great and urgent challenges, including climate impacts of greenhouse gas emissions, local health impacts of criteria pollutants, and political & economic impacts of petroleum dependence. While several revolutionary solutions are being developed to reduce the impact of motor vehicles, such as increased fuel economy standards and accelerated adoption of hybrid vehicles, revolutionary new approaches must also be evaluated. One such opportunity is found in Compressed Air Engine (CA Engine), which is powered solely by compressed air stored in a vehicle on-board pressurized tank. Proponents of this technology claim CA Engines are greener and cheaper to operate, since they do not consume fossil fuels and produce zero tail-pipe emissions, while offering the power and performance needed for light-duty vehicle use.