The “fuel cell cars” currently being advertised are being touted as “having no emissions except water.” In a limited sense that is, in fact, true. However, if the entire fuel cycle for the car is considered, it most certainly is not. The fuel used by the fuel cell is hydrogen, very pure hydrogen. Combined with oxygen from the ambient air, the fuel cell produces electricity that powers an electric motor and other devices in the vehicle — just like the battery-driven electric vehicles already on the market. These don’t produce any emissions at all. So far, so good. No