Carbon footprint of travel per kilometer 2018, by transport mode
The carbon footprint of a medium petrol car was 192 grams of carbon dioxide (CO2) per passenger kilometer in 2018. In comparison, a medium diesel powered vehicle's carbon footprint was 171 grams of CO2 per passenger kilometer. The carbon footprint of a domestic flight (flights less than 1,000 kilometers) was the highest of all transport modes, with 225 grams of CO2 emitted per passenger kilometer. However, the carbon footprint of short-haul and long haul economy flights were considerably less. One reason for this is that less fuel-efficient planes are often used for shorter flights.
