Means of Transport CO2 equivalent emissions per passenger km
Short Flight ✈️ 255g
Medium Car (Gasoline) 🚗 192g
Medium Car (Diesel) 🚗 171g
Medium Flight ✈️ 156g
Long Flight ✈️ 150g
Bus 🚌 105g
Medium Motorcycle 🏍 103g
Gasoline Car (Two Passenger) 🚘 96g
Medium Electric Vehicle 🚙 53g
National Rail 🚂 41g
Ferry ⛴ 19g
Eurostar (International Rail) 🚞 6g

Flying on a short flight or driving alone are the most carbon-intensive travel methods. However, adding one more passenger to your car ends up cutting the emissions in half, making driving more efficient.

, it’s worth breaking down categories of flights more, as their emissions depend greatly on their route length:

• Short Flights: For example, domestic flights within a European country, or flights within a U.S. state have the highest individual carbon footprint.
• Medium Flights: For example, international travel within Europe, or between U.S. states, have a significantly lower carbon footprint per person.
• Long Flights: Flights over 3,700 km (2,300 mi), about the distance from Los Angeles to New York, have the lowest carbon footprint per person.
  Why are longer flights far more eco-friendly than short-range flights? It’s because take-off uses much more energy than the ‘cruise’ phase of a flight. For short flights, the efficient cruise phase is relatively short-lived.