I'd like to find the ecologically most sustainable travel route with classic public transport (bus, train, ship, plane) within Europe by myself without a travel agency. Is there a webpage to build a travel route with classic public transport from one European town to another European town - e.g. from Neapel to Dublin - with most sustainability as the main criteria?
There are several webpages which address part of this question. They either find the fastest or the cheapest travel route which is, unfortunately, not green enough (e.g. Google itself or Skyscanner). Otherwise, they give tips about the choice of economical vehicles (e.g. European Climate Pact) or green accommodations (e.g. Green Pearls). Unfortunately, none of them combines finding travel routes with sustainability as a criteria.