Hungarian designer Peter Simon dreamed up the Credo E-Bone concept bus as public transportation at its greenest. The zero-emissions E-Bone generates power from hydrogen fuel cells and stores juice in lithium-ion batteries mounted on the bus' enormous roof. Motivation is provided by four wheel-mounted electric motors and the concept features lightweight composite plastics throughout. The E-Bone name, though unusual, actually refers to the bus' skeleton-like structure and electric-drive capabilities.
