Hydrogen-powered vehicles use hydrogen gas as fuel to generate electricity through a chemical reaction in a device called a fuel cell. This process produces only water vapor and heat as byproducts, making these vehicles environmentally friendly. They can be refueled quickly, similar to traditional gasoline vehicles, and have a longer driving range compared to many battery-electric vehicles. These vehicles are part of a broader movement towards sustainable transportation, which includes other technologies like battery-electric vehicles and plug-in hybrids. Major automotive manufacturers are investing in hydrogen technology, aiming to reduce reliance on fossil fuels and lower greenhouse gas emissions in the transportation sector.