The HY-WIRE concept car uses hydrogen fuel cells instead of an engine or hydraulic systems. It has a fuel cell stack that powers an electric motor and uses drive-by-wire technology instead of mechanical linkages. The car has a central computer that controls acceleration via hand controls on either side of the driver interface, which uses LCD screens instead of mirrors. The hydrogen fuel is stored in composite cylinders and the fuel cells produce electricity through a chemical reaction with oxygen to power the vehicle without pollution.