Reconciling CO₂ emissions reduction and competitiveness in shipping
Did you know that nearly 80% of international trade volumeis carried by sea? Maritime transport is often described as the backbone of world trade.
The challenge is immense. While the fight against climate change requires a rapid and massive reduction in GHG emissions, maritime transport remains one of the most difficult sectors to decarbonize. Its dependence on highly polluting fossil fuels, its aging infrastructure and the complexity of its international supply chains make the transition particularly demanding.
Yet the stakes are not just environmental. Reducing emissions is becoming a strategic lever for companies in the industry. Environmental transition requires transparency and adaptation to climate change. Organizations need to publish reliable data, in line with the Paris Agreements.
Emissions quotas tighten. The European maritime carbon market (ETS) comes into force, imposing financial constraints. New international regulations force us to act quickly. Customers are demanding more sustainable practices. Investors, attentive to ESG criteria, are stepping up their pressure. Adapting means staying competitive.
1. CO₂ emissions in shipping: a major environmental challenge
1.1 Why does shipping generate high CO₂e emissions?
1.2 The shipping industry's impact on global warming
1.3 Maritime transport: the backbone of world trade
2. Strategies to reduce shipping emissions
2.1 Switching to greener technologies
2.2 Route optimization and navigation practices
2.3 Towards sustainable shipping: cooperation, regulation and the carbon market
3. The benefits of reducing CO₂e emissions for businesses
3.1 Reducing costs and improving efficiency
3.2 Enhancing corporate image and regulatory compliance
3.3 Contributing to the long-term sustainability of the maritime sector
CO₂ emissions in shipping: a major environmental challenge
TheInternational Maritime Organization (IMO) reports that the maritime sector emitted around 1,076 million tonnes of CO2e in 2018, representing almost 2,89 % of global anthropogenic emissions. Without significant intervention, the IMO predicts that these emissions could increase by 50 to 250% by 2050.
❓Why does shipping generate high CO₂e emissions?
Several factors account for this environmental burden:
- Type of fuel used: Heavy fuel oil (HFO), particularly polluting, remains the main fuel in the sector. Its combustion emits not only CO₂, but also fine particles and sulfur.
- Ageing fleet: The average age of a vessel is often over 20 years, slowing down the adoption of new, efficient technologies.
- Distance travelled: The long distances covered by ships require massive energy consumption.
- Load and speed: The faster and more heavily loaded ships are, the more fuel they consume, intensifying emissions of GHGs and atmospheric pollutants, including sulfur oxides.
The daily fuel consumption of a container ship varies according to its size, speed and load.
For example:
According toUsine Nouvelle, a vessel like the Amerigo Vespucci, with a capacity of 13,830 containers (TEU), consumes between 120 and 150 tonnes of heavy fuel oil per day when sailing at an average speed of 18 knots.
💥The impact of the shipping industry on global warming
The maritime sector plays a significant role in global warming, not only through its emissions of carbon dioxide (CO₂), but also through the release of other atmospheric pollutants such as :
- nitrogen oxides (NOₓ)
- sulfur oxides (SO₂).
These substances contribute to ocean acidification and coastal air pollution, affecting human health and marine ecosystems.
According to the IMO's Fourth Greenhouse Gas Report, published in 2020, total GHG emissions from shipping increased by 9.6% from 2012 to 2018. This increase is mainly due to the continued growth of global maritime trade.
The continuing growth in emissions, combined with its significant environmental impact, makes it imperative to develop alternatives. This includes adopting cleaner technologies, alternative fuels and sustainable operating practices to mitigate its carbon footprint.
💡Sea freight: the backbone of world trade.
The 7 advantages of carrying out your company's GHG assessment.
Sea freight dominates, accounting for 71% of trade in 2007 and 77% in 2019. Every year, this trend is confirmed, underlining the structuring role of sea freight in the European Union's trade with third countries.
By way of comparison, other modes remain very marginal: road transport accounts for just 7% in 2019, while rail transport remains stable at 4% over the two periods.
Air transport, though fast-moving, remains negligible in this context, while "fixed infrastructure" (such as pipelines) declines slightly, from 12% to 11%, and other modes drop from 6% to 2%.
Not only is sea freight the backbone of European foreign trade, its importance has grown even further between 2007 and 2019. This development is taking place against a backdrop of tightening environmental and trade regulations, consolidating the central role of the maritime sector in international trade.
Strategies to reduce shipping emissions
Faced with this challenge, several levers for action are emerging to align shipping with global climate objectives. Each company must develop a clear strategy to limit its carbon footprint.
Concrete measures, such as the use of alternative energies or the optimization of shipping routes, are becoming essential. Ports also play a key role in providing appropriate infrastructures, such as shore-side electrification.
How to sustain and strengthen your business through a successful low-carbon trajectory.
✅Switching to greener technologies
Modernizing the fleet is an essential first lever:
- Hybrid or all-electric ships: the Yara Birlekand (electric ship) in Norway is capable of sailing without greenhouse gas emissions, thanks to an all-electric propulsion system powered by 6.7 Mwh lithium-ion batteries supplied by Leclanché. But the journey is still a short distance.
- Alternative energy sources :
- LNG (Liquefied Natural Gas): reduces CO₂e emissions by approx. 20 % compared with heavy fuel oil.
- Green hydrogen and ammonia: zero CO₂ emissions at the point of use, but their deployment remains conditioned by cost and infrastructure.
- Vehicle assistance systems: projects such as Oceanbird by Wallenius Marine are based on ships powered 90% by wind.
💯 Route optimization and navigation practices
- Slow steaming: A 20% reduction in speed can cut fuel consumption by up to 40%, according to the former head of Barry Rogliano Salles (BRS).
- Route optimization using artificial intelligence: use real-time weather to choose shorter or more fuel-efficient routes.
- Hydrodynamic improvement: The Mediterranean Action Plan (MAP) indicates that, with appropriate management, a smooth hull can deliver fuel savings of up to 10%.
💚Vers un transport maritime durable: coopération, régulation et marché du carbone
The ecological transition of maritime transport depends on collective efforts. Cooperation between public and private players is essential. Every year, sea freight generates around 3% of the world's greenhouse gases (GHGs). Coordination is therefore essential
1. Sharing environmental data:
Transparency on CO₂e performance is becoming a competitive criterion. Shipping companies, charterers and shippers are comparing vessels according to their energy efficiency. This is driving the adoption of cleaner solutions.
2. IMO EEXI and CII standards:
Since 2023, the IMO has imposed two key indicators, EEXI (Energy Efficiency Existing Ship Index) and CII (Carbon Intensity Indicator). Shipowners must optimize their vessels' consumption to remain compliant.
3. Public-private partnerships:
These partnerships facilitate the financing of alternative fuels (LNG, methanol, green ammonia) and clean technologies (rigid sails, hydrogen, CO₂ capture). They also give access to European aid, such as that provided by the Green Pact.
4. Maritime ETS market:
In 2024, the European Union includes the maritime sector in its Emissions Trading Scheme (ETS). Shipping companies will have to buy CO₂ allowances for a share of their emissions.
This system reinforces the "polluter pays" principle and creates economic pressure to decarbonize. As a result, freight-related operating costs could rise.
Compliance with international regulations, particularly those of the IMO, requires rapid adaptation. Not to mention the fact that transparency through regular reporting on emissions and actions taken strengthens the credibility of environmental commitments.
The benefits of reducing CO₂e emissions for businesses
Reducing emissions is not just a regulatory obligation. It's also a responsible approach, in line with society's current expectations in the face of climate change.
Reducing costs and improving efficiency
At a time when air pollution from shipping contributes not only to greenhouse gas emissions, but also to the emission of fine particles, every player in the industry needs to rethink their business model.
- On average, fuel represents 50 à 60 % of a ship's operating costs
- Lower consumption therefore directly reduces financial expenses.
In France, as elsewhere, regulatory and societal pressure is intensifying to accelerate the energy transition. Using energy more efficiently is becoming both an economic imperative and a strategic opportunity.
What's more, anticipating future carbon taxes (such as the proposed EU maritime tax scheduled for 2026) and quotas imposed by the European carbon market (ETS) for maritime transport, helps avoid heavy economic penalties.
Enhancing corporate image and regulatory compliance
Today, we are witnessing a growing demand for social and environmental responsibility (SER), and positioning oneself as a committed player is a strong competitive advantage:
- Strengthen customer loyalty.
- Attract ESG-sensitive investors.
- Meet international regulatory requirements (Paris Agreement, Fit for 55, European carbon market, etc.).
Contributing to the long-term sustainability of the maritime sector
Shipping companies need to adopt a sustainable strategy now to ensure the long-term future of their business. Implementing concrete measures will enable more responsible freight transport and limit the risks associated with future regulations.
1. Use of alternative energies
Adoption of low-carbon fuels such as LNG (liquefied natural gas), green methanol or ammonia to reduce environmental impact.
2. Dockside electrification (cold ironing)
Connecting ships to shore power when docked, to switch off auxiliary engines and limit greenhouse gas and fine particle emissions in ports.
3. Route optimization
Implementation of intelligent routing software to reduce fuel consumption and avoid ecologically sensitive areas.
4. Eco-optimized speed (slow steaming)
Voluntary reduction in ship speed to cut energy consumption and CO₂e emissions.
5. Installation of hybrid or veliac propulsion systems
Integration of rigid sails, rotors or wings to harness wind energy as a complement to the motor.
6. Fleet modernization
Gradual replacement of older vessels with more efficient, less polluting and better insulated units.
7. Ballast water treatment and waste management
Adoption of ballast water treatment systems and compliance with on-board waste management standards.
8. Environmental certification
Obtaining labels or certifications (such as ISO 14001 or Green Marine Europe) to formalize the company's environmental commitment.
By reducing their environmental impact and promoting the use of cleaner energy, they strengthen their position in climate-sensitive markets. Acting today means anticipating tomorrow's challenges and ensuring a more stable, sustainable future.
At TkBlue Agency, we support shipping industry players in their energy transition in concrete and measurable ways:
- Precise assessment of the carbon footprint of your logistics flows according to ISO 14083 and GLEC standards.
- Identification of levers for improvement through customized environmental audits.
- Implement reliable, certified environmental reporting in line with stakeholder expectations (customers, regulators, investors).
- Enhancing your CSR commitments: by integrating your performance into a label recognized on the international market.
Whether you're a shipping company, a port, or a government regulator, we provide you with accurate data and reliable information to inform your decisions and boost the sustainable performance of your operations.
Thanks to our innovative digital tools and certified expertise, we can help you transform your environmental constraints into genuine strategic assets for your future development.
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Sources
- WTO | Maritime transport
- CO2 emissions by mode of transport
- Fourth Greenhouse Gas Study 2020
- How to reduce the carbon footprint of sea freight? - Polytechnique Insights
- Third-IMO-GHG-Study-2014-Executive-Summary-and-Final-Report.pdf
- The slow cruise of a container ship
- 4th-IMO-GHG-Study-2020.pdf
- European Maritime Transport Environmental Report 2021
- Reducing CO2e emissions in the transportation sector
- The Yara Birkeland, the world's first 100% electric and autonomous container ship, powered entirely by a Leclanché battery system, is preparing for commercial operation - Leclanché
- Study: LNG reduces greenhouse gas emissions from shipping by 23%.
- BRS boss reignites the slow steaming debate - BRS Shipbrokers
- How to reduce the carbon footprint of sea freight? - Polytechnique Insights
- The Cost of Reducing Greenhouse Gas Emissions in Shipping