Question: How energy efficient is the freight transport by cargo ship? Estimate how much energy is need to transport 1 ton-km of goods by maritime shipping. Do an online search for the relevant quantities/numbers to calculate the kWh/t-km of a typical cargo ship.
(A) Hint: Find fuel consumption per km and container of a typical ship
(B) Useful numbers:
Container weight 20 t
Diesel density ~ 1 kg/I
Diesel energy density 13 kWh/kg