Global container shipping emissions hit a record 240.6 million metric tonnes in 2024, up 14 per cent, driven by Red Sea conflict-related diversions.
Larger ships over 14,500 TEU saw steep emission rises, but mid-sized vessels (8,000–12,000 TEU) emerged as more inefficient.
Emissions outpaced transport growth for mega ships due to higher speeds and reduced utilisation, raising decarbonisation concerns.