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International Maritime Organization (IMO) adopts revised strategy to reduce GHG emissions from international shipping.

Member States of the International Maritime Organization (IMO), meeting at the Marine Environment Protection Committee (MEPC 80) earlier this month, adopted the 2023 IMO Strategy on Reduction of GHG Emissions from Ships.

The revised IMO GHG Strategy includes an enhanced common ambition to reach net-zero GHG emissions from international shipping close to 2050; a commitment to ensure an uptake of alternative zero and near-zero GHG fuels by 2030, as well as indicative check-points for 2030 and 2040.

IMO is the United Nations specialized agency with responsibility for developing global standards for shipping and supporting countries to implement those rules.

Levels of ambition directing the 2023 IMO GHG Strategy are as follows:

  1. To review ship carbon intensity with the aim of strengthening the energy efficiency design requirements for ships;

  2. To reduce CO2 emissions per transport work, as an average across international shipping, by at least 40% by 2030, compared to 2008;

  3. The uptake of zero or near-zero GHG emission technologies, fuels and/or energy sources to represent at least 5%, striving for 10%, of the energy used by international shipping by 2030; and

  4. To peak GHG emissions from international shipping as soon as possible and to reach net-zero GHG emissions by or around, i.e. close to 2050, taking into account different national circumstances, whilst pursuing efforts towards phasing them out as called for in the Vision consistent with the long-term temperature goal set out in Article 2 of the Paris Agreement.

Indicative checkpoints to reach net-zero GHG emissions from international shipping:

  1. To reduce the total annual GHG emissions from international shipping by at least 20%, striving for 30%, by 2030, compared to 2008; and

  2. To reduce the total annual GHG emissions from international shipping by at least 70%, striving for 80%, by 2040, compared to 2008.

The 2023 GHG Strategy states that a basket of candidate measure(s), delivering on the reduction targets, should be developed and finalized, comprising both:

  1. A technical element, namely a goal-based marine fuel standard regulating the phased reduction of the marine fuel’s GHG intensity; and

  2. An economic element, on the basis of a maritime GHG emissions pricing mechanism.

The candidate economic elements will be assessed observing specific criteria to be considered in the comprehensive impact assessment, with a view to facilitating the finalization of the basket of measures.

The mid-term GHG reduction measures should effectively promote the energy transition of shipping and provide the world fleet a needed incentive while contributing to a level playing field and a just and equitable transition, the IMO said.

The strategy says that the impacts on States of a measure/combination of measures should be assessed and taken into account as appropriate before adoption of the measure. Particular attention should be paid to the needs of developing countries, especially small island developing states (SIDS) and least developed countries (LDCs).

The 2023 Strategy sets out a timeline towards adoption of the basket of measures and adoption of the updated 2028 IMO GHG Strategy on reduction of GHG emissions from ships:

  • MEPC 81 (Spring 2024) - Interim report on Comprehensive impact assessment of the basket of candidate mid-term measures/Finalization of basket of measures

  • MEPC 82 (Autumn 2024) - Finalized report on Comprehensive impact assessment of the basket of candidate mid-term measures

  • MEPC 83 (Spring 2025) - Review of the short-term measure to be completed by 1 January 2026

  • MEPC 84 (Spring 2026) - Approval of measures / Review of the short-term measure (EEXI and CII) to be completed by 1 January 2026

  • Extraordinary one or two-day MEPC (six months after MEPC 83 in Autumn 2025) - Adoption of measures

Target dates:

  • MEPC 85 (Autumn 2026)

  • 16 months after adoption of measures (2027) - Entry into force of measures

  • MEPC 86 (Summer 2027) - Initiate the review of the 2023 IMO GHG Strategy

  • MEPC 87 (Spring 2028)

  • MEPC 88 (Autumn 2028) - Finalization of the review of the 2023 IMO GHG Strategy with a view to adoption of the 2028 IMO Strategy on reduction of GHG emissions from ships.

Life cycle GHG assessment guidelines adopted. The MEPC also adopted Guidelines on life cycle GHG intensity of marine fuels (LCA guidelines) for consideration and adoption. The LCA guidelines allow for a Well-to-Wake calculation, including Well-to-Tank and Tank-to-Wake emission factors, of total GHG emissions related to the production and use of marine fuels.

The Marine Environment Protection Committee (MEPC) addresses environmental issues under IMO’s remit. This includes the control and prevention of ship-source pollution covered by the MARPOL treaty, including oil, chemicals carried in bulk, sewage, garbage and emissions from ships, including air pollutants and greenhouse gas emissions. Other matters covered include ballast water management, anti-fouling systems, ship recycling, pollution preparedness and response, and identification of special areas and particularly sensitive sea areas.

MEPC 80 met 3-7 July 2023 at IMO Headquarters in London. It was attended by some 1,800 delegates (in person and remotely).

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