Source: adapted from Intergovernmental Panel on Climate Change (2014) Climate Change 2014: Mitigation of Climate Change.
The above chart depicts the respective share of energy consumption by type of fuel, transportation mode, type of transport (passenger or freight), and the level of energy efficiency. It also depicts the primary energy flows between sectors. Oil-related fuels accounted for 94% of the energy used by transportation modes, with gasoline being the most used fuel (43.5%), followed by diesel (34.5%) heavy oil, biofuels, and kerosene (21.8%). Electricity and gases (e.g. LNG) account for marginal use as fuels. Gasoline is mostly used for light road vehicles (cars and vans) for passenger transportation. Diesel is the prevalent fuel for heavy road vehicles for freight transportation. Water transportation relies on heavy oils, and the vast majority of the fuel is used for freight transport. For air transport, kerosene is the primary fuel, mostly used to carry passengers. The energy conversion level for the transport sector is around 32%, a figure which is higher for freight transport than for passenger transport.