Water transport remains the backbone of global trade for compelling reasons:
Lowest cost per ton-mile for bulk cargo (coal, ore, grain, oil). One large ship = hundreds of trucks/trains.
Ships emit ~10–40g CO₂/ton-km vs. ~80g for truck, ~20g for rail. New fuels (LNG, methanol, wind-assist) improve further.
Rivers, canals, and coastal routes reach regions without roads/rails. Vital for island nations and landlocked countries via river-sea vessels.
Far fewer fatalities per ton-mile than road/rail. Regulated by IMO (SOLAS, MARPOL).
Water transport moves ~90% of world trade by volume. Its economic and environmental advantages ensure its continued dominance.