The following submission statement was provided by /u/nastratin:

It is surprisingly difficult to build a carbon neutral sailing ship. This is even more the case today, because our standards for safety, health, hygiene, comfort, and convenience have changed profoundly since the Age of Sail

The sailing ship is a textbook example of sustainability. For at least 4,000 years, sailing ships have transported passengers and cargo across the world’s seas and oceans without using a single drop of fossil fuels.

If we want to keep travelling and trading globally in a low carbon society, sailing ships are the obvious alternative to container ships, bulk carriers, and airplanes.

Please reply to OP's comment here: https://old.reddit.com/r/Futurology/comments/112xlwt/how_to_design_a_sailing_ship_for_the_21st_century/j8mogd3/