3 ms·
Not more efficient than trains. Environmentally, we'd all be better off if goods to the US were produced in Mexico and shipped into the US by train.
by brightball 7y ago
Not more efficient than trains. Environmentally, we'd all be better off if goods to the US were produced in Mexico and shipped into the US by train.
- Symmetry 7y agoYes more efficient than trains, though only by a factor of 2 to 3. 0.209 to 0.35 mJ/tkm for rail versus 0.11 for ocean freight. Domestic water freight (river barges) is 0.16. Road freight is 1.3 to 2.4 and air freight is 6.9 to 10.5 waaaay worse than any of these. https://en.wikipedia.org/wiki/Energy_efficiency_in_transport https://en.wikipedia.org/wiki/Energy_efficiency_in_transport