Sustainability FAQs
Curious about the science behind our sustainability facts? Here’s a bit more detail about how we worked them all out.
Taking the train instead of driving creates 67% less CO2e.
Calculations are based on CO2 / passenger km: comparing an average petrol car, using statistics and conversion factors published in the government's greenhouse gas reporting conversion factors published 7 June 2023 and revised 28 June 2023.
The maths behind the science:
Cars and planes create 74% of Europe’s transport CO2 emissions, whereas the entire rail network adds up to less than 1%.
Emission calculations based on approximate figures taken from the EEA Transport and Environment Report 2021 published on 1 June 2022 (page 18).
Cars and planes create 58% of the UK’s transport CO2 emissions, whereas the entire rail network adds up to just 1.5%.
Based on UK 2019 domestic emissions calculations as a percentage. Emission calculation for cars reflects total emissions for cars and other road transport. See Department for Transport’s Transport and Environment Statistics 2021 Annual Report (page 6).
The maths behind the science:
UK: Trains emit 7 x less CO2 than planes.
Travelling by train instead of plane creates 7 x less CO2. So, swapping to train is one of the biggest impacts you can make on your carbon footprint.
Calculations are based on CO2 / passenger km: comparing an average petrol car, using statistics and conversion factors published in the government's greenhouse gas reporting conversion factors published 7 June 2023 and revised 28 June 2023.
The maths behind the science:
EU: Trains emit 5 x less CO2 than planes.
Trains emit approximately 5 x less CO2 than planes. Emission calculation based on the EEA Transport and Environment Report 2021, published June 2022 (page 38, diagram 4.3)
Taking the train instead of flying creates 86% less CO2e.
Calculations are based on CO2 / passenger km: comparing an average petrol car, using statistics and conversion factors published in the government's greenhouse gas reporting conversion factors published 7 June 2023 and revised 28 June 2023.