Designing a fuel cell scooter. Designer using computer aided design (CAD) to model a new design for a fuel cell scooter. The computer program allows designs to be tested without expending the time and money required to build a working model. This scooter will be powered by a hydrogen fuel cell rather than a standard engine. The fuel cell is environmentally friendly as it emits only water as a waste product. It reacts hydrogen from a tank with oxygen from the air to produce electricity. Photographed in Italy.