The UK’s Maritime Decarbonisation Strategy commits to zero shipping emissions by 2050. Achieving this ambition will require coordinated action between industry and government, including investment in green ammonia production, port bunkering infrastructure, supportive regulation, and ongoing international engagement.

Shipping underpins everyday life, but it remains heavily reliant on fossil fuels and is a major source of greenhouse gas emissions. As the transition to a low‑carbon economy accelerates, the shipping sector faces growing pressure to adopt cleaner alternatives. Green ammonia is gaining attention as a potential low‑carbon marine fuel. With an established global supply chain, proven storage and handling practices, and the ability to build on existing industrial systems, it offers a credible pathway to reducing shipping emissions.

Drawing on research from MariNH3 and the UK National Clean Maritime Research Hub, this briefing explains what green ammonia is, why it matters for shipping, and the policy action needed to enable its safe and effective use. It explores the policy implications across three linked areas: using ammonia as a shipping fuel, ensuring green ammonia supply, and managing safety considerations.

 

This briefing is authored by Dr Laura Norris, MariNH3, Cardiff University and Dr Claire Copeland, UK National Clean Maritime Research Hub, Durham University.