How we did our calculations:
SJ purchases 100 % renewable electricity from hydropower, of which 50 % also carries the Good Environmental Choice label, which places more stringent environmental requirements on the generation of electricity. Our journeys have carried the Good Environmental Choice label for over 20 years.
Our calculations are based on the electricity we purchase, in other words electricity from a renewable source (hydropower). This is in line with the international standards on calculating transport emissions, such as EN 16258 or the Greenhouse Gas Protocol.
Enery consumption, train:
0.055 kWh/passenger-kilometre. This figure is for an X 2000 train at average occupancy.
Source: SJ (measurements taken during live operation).
Carbon dioxide emissions from the generation of hydropower electricity:
0.059 grams of CO2/kWh. This figure includes losses in the public grid and in the rail network.
Source: Vattenfall EPD 2018 (Environmental Product Declaration) for the generation of hydropower electricity.
0.055*0.059 = 0.0033 grams of CO2/passenger-kilometre. The Stockholm–Gothenburg rail route is 455 km long.
0.0033 grams of CO2/passenger-kilometre = 1.5 grams of CO2 for a train journey from Stockholm to Gothenburg.
Carbon dioxide emissons, flight:
59 kg CO2 for a flight from Stockholm Arlanda to Gothenburg Landvetter.
Source: SAS Emission Calculator.
Carbon dioxide emissions, car:
1 person in the car: 122 grams of CO2/km
2 people in the car: 61 grams of CO2/km
Source: Swedish Transport Agency; CO2 emissions, average new car 2018.