I'd like to add that cargo ships, while being very efficient in terms of how much they can transport over a unit distance given unit energy, require enormous am

I'd like to add that cargo ships, while being very efficient in terms of how much they can transport over a unit distance given unit energy, require enormous amounts of energy. See some resources: - https://en.wikipedia.org/wiki/Energy_efficiency_in_transportation#Ships https://en.wikipedia.org/wiki/Energy_efficiency_in_transport... - https://people.hofstra.edu/geotrans/eng/ch8en/conc8en/fuel_consumption_containerships.html https://people.hofstra.edu/geotrans/eng/ch8en/conc8en/fuel_c...