Fuel Cell Electric Vehicles (FCEVs) use hydrogen gas to generate electricity through a chemical reaction in a fuel cell. This process produces only water vapor as a byproduct, making FCEVs an environmentally friendly alternative to traditional gasoline-powered cars. FCEVs are equipped with a hydrogen tank that stores the gas, allowing for quick refueling similar to conventional vehicles. They offer a longer driving range compared to battery electric vehicles and can be refueled in just a few minutes, making them a practical option for many drivers looking for sustainable transportation solutions.