Perhaps not a solution, but wind assist [1,2] for shipping seems like a way to chip away at that problem. [1] https://en.wikipedia.org/wiki/Wind-assisted_propu

Perhaps not a solution, but wind assist [1,2] for shipping seems like a way to chip away at that problem. [1] https://en.wikipedia.org/wiki/Wind-assisted_propulsion https://en.wikipedia.org/wiki/Wind-assisted_propulsion [2] https://en.wikipedia.org/wiki/MS_Beluga_Skysails https://en.wikipedia.org/wiki/MS_Beluga_Skysails