Fuel cell vehicles are increasingly recognised as a promising pathway for achieving global net-zero greenhouse gas emissions in the transportation sector. Unlike conventional internal combustion engines, fuel cells generate electricity through electrochemical reactions and produce only water as a by-product during operation. Although this operational advantage makes fuel cells an attractive clean energy technology, their growing deployment raises sustainability concerns about the environmental impacts of their manufacturing. As fuel cell production scales up to support the transition toward low-carbon mobility, it becomes essential to quantify and reduce emissions occurring during the manufacturing stage. This study provides a detailed look at the environmental issues in fuel cell manufacturing that uses laser beam methods, combining results from recent life cycle assessment studies published between 2020 and 2026. The review focuses on identifying key materials, components, and processes that contribute disproportionately to environmental impacts during production. Platinum group metals used in catalysts are the most significant hotspot due to their scarcity and the energy-intensive mining and refining processes. Additional hotspots include membrane electrode assemblies, bipolar plates, and energy consumption during component fabrication and stack assembly. These processes contribute to impacts such as climate change, resource depletion, and human toxicity. The findings emphasise that achieving true sustainability for fuel cell vehicles requires addressing emissions embedded in the manufacturing phase using LBM.