The article explores how green hydrogen technology can help reduce emissions from transportation. It explains how green hydrogen is made and used as fuel for a kind of vehicle called Fuel Cell Electric Vehicles (FCEVs). The paper discusses the advantages and disadvantages of these vehicles, as well as current efforts to encourage their use. It also looks at the challenges that need to be addressed for green hydrogen vehicles to help in making transportation more sustainable and less polluting. Moreover, the importance of Battery Management Systems (BMS) for FCEVs is highlighted in the discussion. The research provides important insights into how green hydrogen vehicles could play a role in creating a cleaner and more environmentally friendly transportation system.