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Rotterdam to Genoa freight CO2 emissions
One tonne of cargo shipped Rotterdam (NLRTM) to Genoa (ITGOA) by sea emits 37.8 kg CO2e well-to-wake at GLEC v3.2 default factors. The same tonne by air emits 739.5 kg — roughly 20x the sea number.
Lane noteRhine-Alpine corridor — the EU Combined Transport network targets a modal shift to rail on this route. Road still dominates on volume but rail captures roughly 18% of containerised tonnage.
Per-tonne CO2e by mode
Sea freight
Container ship 2,000-4,000 TEU
- Distance
- 4,200 km
- Factor (WTW)
- 9 g CO2e/tkm
- Per shipment
- 1 t × 4,200 km
- Factor source
- GLEC v3.2 container 3,000-5,100 TEU (Sub-Panamax, WTW)
Road freight
40t articulated truck, diesel
- Distance
- 1,080 km
- Factor (WTW)
- 62 g CO2e/tkm
- Per shipment
- 1 t × 1,080 km
- Factor source
- GLEC v3.2 articulated heavy truck, diesel, 60% load factor (WTW)
Rail freight
Electric intermodal rail
- Distance
- 1,200 km
- Factor (WTW)
- 18 g CO2e/tkm
- Per shipment
- 1 t × 1,200 km
- Factor source
- GLEC v3.2 European electrified intermodal rail (WTW)
Air freight
Short-haul belly cargo
- Distance
- 870 km
- Factor (WTW)
- 850 g CO2e/tkm
- Per shipment
- 1 t × 870 km
- Factor source
- GLEC v3.2 short-haul belly cargo (WTW)
Mode comparison
On the Rotterdam to Genoa lane, air freight emits about 20 times more CO2e per tonne than sea freight at GLEC v3.2 defaults. The gap is driven by the WTW factor difference between long-haul belly cargo (850 g CO2e/tkm) and a Container ship 2,000-4,000 TEU (9 g CO2e/tkm), partly offset by the shorter great-circle air routing.
Where rail is viable on this lane, it sits between sea and road — see the per-mode card above for the exact split.
Try this in the calculator
These numbers are GLEC v3.2 defaults at 1 tonne. Change weight, vessel class, or load factor in the calculator and see the per-mode CO2e update under ISO 14083:2023 data quality tiers.
Methodology references
- Methodology — GLEC v3.2 emission factors and ISO 14083 data quality tiers
- GLEC v3.2 in practice — three worked emission calculations
- Per-class container ship CO2 factors by TEU range
- What changed in GLEC v3.2 vs v3.0 and v3.1
- Glossary — WTW vs TTW vs WTT, ISO 14083 data quality tier definitions
- The 2026 State of Freight Emissions Report
- All trade-lane CO2 pages