this post was submitted on 09 Sep 2023
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Which is no problem at all in urban areas.
It’s not achievable yet. Trucks are, at minimum, the last mile for transport of everything from building materials to equipment to food to medicine. EV trucks and vans are in development but battery technology isn’t quite there yet.
It would also require banning large container and cruise ships from most major ports. The former world obliterate economies. The latter would obliterate tourism industries for many major cities around the world. We’re decades away from large ships being low emission. Maersk is trialing hydrogen vessels right now to poor results.
Spoiler: Most Europeans don't live near major ports. You can discuss a lot about cargo ships, but the cruise industry shouldn't be at all allowed to cruise into major ports and poison the population. It's totally possible to build clean ships. We don't have to accept this!
I guess people forget that ships originally where powered 100% by wind and manpower. Would love to see that coming back in some form, but seems like it's just not profitable enough (yet).
Given the mass of modern ships, wind doesn’t generate enough force to manoeuvre and thrust ships anywhere close to safety and efficiency. The math just doesn’t work. It would take a 5x5km kite (extremely rough estimate) with perfect wind conditions at all times. Maersk is trialing kite thrust augmentation right now, which is projected to reduce oil consumption, but not by a large margin.
It's obviously not as energy-efficient as burning fossil fuels, so it's a hard sell. Honestly, I just want it to come back for the looks (and obviously the environmental health benefits).
I wonder whether vertical wind turbines would be powerful enough to power a ship?