/r/solarpunk is a sub for those interested in “solarpunk aesthetics” which means carbon free degrowth utopias for their scifi stories/games, etc.
Naturally their zero CO2 emissions world has no place for planes.
https://old.reddit.com/r/solarpunk/comments/113j3et/how_do_we_travel_overseas_in_a_solarpunk/
A bit arduous is quite an understatement
Once we get rid of capitalism everyone will be free to sail around the world 
This is literally how it was done for all of history until the mid-1800s.
Sailing across the oceans was quite dangerous back then, I doubt redditcels will enjoy being in the middle of the Atlantic during a storm.
https://old.reddit.com/r/solarpunk/comments/r267s1/the_future_of_long_distance_air_travel_airships/
sail boats. people will have a lot more time to travel. in fact the voyage will be as important as the time spent in the destination, if not more important.
in fact i'm willing to bet that, in the future people will spend way more time travelling the world than we do now. because our "union" will not be because we share products it will be because we will share experiences.
humanity will not be tied economically it will be tied because we, our friends and family will have shared real experiences all around the world. no longer people will look at someone else from another country as another species because we will all travel around the world.
Bonus, some discussion on their meme ideologies
https://old.reddit.com/r/solarpunk/comments/1bbgodf/political_ideologies/
Oh no !neolibs bros 
Lot's of “wholesome degrowth”
Jump in the discussion.
No email address required.
These people have never stepped on a boat before have they.
Jump in the discussion.
No email address required.
Or a plane for that matter.
Jump in the discussion.
No email address required.
I've been terrified by 6ft waves in Erie. I can only imagine real weather in the ocean.
Jump in the discussion.
No email address required.
Very informative video on Rogue waves
Basically before the late 19th century we didn't even know whether lone waves in the middle of the oceans were real, because all the sail ships which encountered them were swept away, it was only with the large steam ocean-liners that they were finally confirmed as those were the first ships to survive encounters, back in colonial times a small percentage of ships didn't make it in their journeys across the Atlantic, they were lost either due to bad weather, disease, pirates and rogue waves and no one would even have the means to know what happened to them.
Jump in the discussion.
No email address required.
This channel is very hit or miss. I watched a few videos but had to drop it when he off-handedly mentioned medieval European sailors "praying to the gods".
Edit: Whoops, I was thinking of the channel "Maritime Horrors" instead.
Jump in the discussion.
No email address required.
More options
Context
No wonder we have so many tales of how scary the sea is.
Shout out to the brave pioneers
Jump in the discussion.
No email address required.
More options
Context
I wish deep sea drones were better
There's easily 1000s of shipwrecks in the oceans full of cool stuff 
Jump in the discussion.
No email address required.
In the case of the myriad wrecks of the Pacific Theater of WW2, The darn Chinese are cutting them up for scrap. Imagine you're doomed to a watery grave in war and some Chinese guy digs up your grave and desecrates your corpse.
Jump in the discussion.
No email address required.
The spirit of the samurai warrior lives on when an escalator made of steel taken from an IJA ship dismembers Chinese people
!historychads
Jump in the discussion.
No email address required.
More options
Context
Don't they use WW2 wrecks for Geiger counters, since the metal won't contain trace particles from nuclear explosions?
Jump in the discussion.
No email address required.
All sorts of other stuff too
Jump in the discussion.
No email address required.
More options
Context
More options
Context
More options
Context
More options
Context
The worst was ships getting caught in the doldrums for weeks on end, just baking to death in the hot sun with no wind until they all died of thirst
Jump in the discussion.
No email address required.
More options
Context
Great vid, thanks for sharing!
Jump in the discussion.
No email address required.
More options
Context
More options
Context
It's easy to forget that ships used to just disappear without a trace in the ocean. Rogue waves weren't even confirmed until like the 70s when weather buoys in the deep ocean became prevalent, because they either used to just instantly sink ships or the survivors of rogue waves sounded like they were telling tall tales of 80 foot swells washing over the decks
Jump in the discussion.
No email address required.
Yeah the video linked below made that very clear. Those stories do sound incredible if we didn't have the evidence to prove it.
Jump in the discussion.
No email address required.
More options
Context
More options
Context
I went boating in the Apostle Islands in lake Superior. Those waves are no joke.
Jump in the discussion.
No email address required.
More options
Context
Kitty
Jump in the discussion.
No email address required.
IDK bro it gets pretty
when you see those swells come in on a 25ft boat
Jump in the discussion.
No email address required.
For you maybe
Jump in the discussion.
No email address required.
More options
Context
More options
Context
More options
Context
More options
Context
More options
Context
More options
Context