Moreover, the end product (electricity, biofuels, etc.) is not the only factor determining how environmentally sustainable a fuel is. The way the actual fuel is produced should also be taken into account. For example, electricity generated by wind power is certainly cleaner than electricity produced by coal. Transport’s demand for energy can be best addressed through a comprehensive analysis and vision for the entire energy system, taking into account the demand from all economic sectors and the supply potential from a mix of energy sources.