Shipping decarbonisation debate sharpens around IMO framework and port nuclear planning

· Climate

Debate over how to decarbonise shipping is intensifying. In April 2025, governments at the International Maritime Organization agreed a global Net-Zero Framework aimed at putting shipping on a path to net zero by 2050, and a new commentary argues EU regional rules show how such regional measures can support the global framework. Separately, Future Cleantech Architects published a factsheet comparing options including batteries, biofuels, methanol, ammonia, hydrogen, wind assistance, shore power, nuclear propulsion and onboard carbon capture for different vessel types. A joint paper from the British Ports Association and Lloyd's Register says ports should begin structured planning for advanced nuclear now.

Why it matters：Shipping's fuel transition hinges on regulatory certainty and infrastructure choices, and ports and carriers must commit capital years before rules take effect.

Key points

  • The IMO Net-Zero Framework was agreed in April 2025.
  • The Future Cleantech factsheet compares nine fuel and technology options.
  • The ports paper treats advanced nuclear as a long-term infrastructure question, not a marine fuel.

Sources (original reporting)

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