So if you are unable to splash out $37K you cannot be 'responsible'?.. It takes ages and it is far more expensive to travel overland around the world, thus this is only suitable for a tiny travel minority, probably bloggers. nypost.com/2021/06/16/responsible-no-fly-world-tou…

‘Responsible’ no-fly world tour features trains, cargo ships for $37K

The 80-day trip is billed as a greener, more carbon-footprint-minimizing mode of transportation compared to air travel.