Some Silicon Valley startup will probably come up with the innovative idea of building ships from wood and propelling them with wind power. As long as they are adding AI it will probably be worth a few billion investment .
worth a punt
Propelling ships with hydrogen or methane made with wind power is the most probable path for fuel in the next decades.
This would be too reasonable.
There's been trials of sails for cargo ships.
Came here to see if anyone would make a reference to the Yggdrasill. I was not disappointed!
Hyperion is a great read for anyone looking for their next scifi book BTW. :)