Originally Posted by
Gnopps
I'd like to add ferry to this. Living in Finland you in practice have to make the desicion of flying or taking the ferry to get to the rest of Europe.
Also, with trains depending on how it is powered (green electricity? dirty diesel? electricity made from coal?) it may not always be a great choice:
https://www.economist.com/gulliver/2...n-as-they-seem
I think the first step would be to check the ferry website for information on CO2 emissions. The information may not be there or tricky to use for a single trip calculation. Flights are easier to calculate now as more sophisticated calculators are becoming available. The calculator use is
https://www.atmosfair.de/en/offset/flight. As for the train, the operating company might provide info on how it is sourcing its power and the percentage of renewable energy used.