IMO 2050 Strategy

The IMO 2050 Strategy refers to the 2023 IMO Strategy on Reduction of GHG Emissions from Ships, adopted in July 2023 at the 80th session of the Marine Environment Protection Committee (MEPC 80) in London. It replaced the IMO's 2018 Initial GHG Strategy and significantly raised ambition in line with pressure from Pacific island states, the EU, and climate advocates.

The strategy commits IMO member states to reaching net-zero greenhouse gas emissions from international shipping by or around 2050, "taking into account different national circumstances." It also sets indicative checkpoints:

• A 20% reduction (striving for 30%) in total annual GHG emissions from international shipping by 2030, compared to 2008 levels.
• A 70% reduction (striving for 80%) by 2040, compared to 2008.
• Uptake of zero or near-zero GHG emission fuels, technologies, and energy sources to represent at least 5% (striving for 10%) of energy used by international shipping by 2030.

Crucially, the 2023 strategy adopts a well-to-wake emissions accounting approach, covering lifecycle emissions of marine fuels rather than only onboard combustion. This matters for assessing alternative fuels like LNG, ammonia, methanol, and hydrogen.

The strategy is paired with work on mid-term measures, including a technical element (a global marine fuel standard reducing GHG intensity over time) and an economic element (a pricing mechanism on shipping emissions). These measures are scheduled for adoption in 2025 and entry into force around 2027.

Shipping accounts for roughly 3% of global GHG emissions and was excluded from the Paris Agreement's nationally determined contributions, making the IMO the primary regulator. Critics, including several Pacific Island states and environmental NGOs, argue the "by or around 2050" language and qualifiers weaken enforceability. Industry groups such as the International Chamber of Shipping broadly supported the revised targets.