In addition to fuels, passenger and freight transport requirevehicles and infrastructure. As with fuels, the provision of goodsand services that are needed for the operation of transport involvesthe consumption of energy and the emission of greenhouse gases. Theenergy consumed and greenhouse gases emitted due to fuel use byvehicles are referred to as direct requirements, while indirectrequirements of energy and greenhouse gases are embodied in the goodsand services mentioned before. indirect requirements form asignificant part of the total energy and greenhouse gases requiredfor a given transport task. They depend on the transport mode,ranging from l0/100 to 50/100 for freight transport and from 25/100to 65/100 for passenger transport. These indirect requirements haveto be taken into account when options for reducing the energyconsumption and greenhouse gas emissions of the transport sector areto be evaluated.
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