by Elsie Clark | Jan 7, 2026 | Sustainability
A study has revealed how aviation could halve its emissions without cutting flights.
As demand for air travel continues to rise, the industry needs to find solutions that can mitigate its climate impact. The global aviation sector’s carbon footprint could as much as triple by 2050 if more is not done to implement sustainable practice. New research led by Prof Stefan Gössling at Linnaeus University in Sweden finds that overall emissions could be halved by getting rid of premium seating, filling flights to the maximum, and flying only the most fuel- and energy-efficient aircraft.
Gössling told The Guardian:
I always thought air transport was already very efficient, and that is also what airlines like to tell people. But, in reality, it’s very inefficient because of the three factors: using old aircraft, transporting people [in premium seats] with lots of space, and often having aircraft that are not really fully loaded.
Analysing 27 million flights from 2023, the researchers endeavoured to highlight notable inefficiencies in sustainability. In 2023, the average load factor for aircraft was 80%. The study recommends increasing this average to 95%. Analysis by region also found that regions such as India and South America were running greater numbers of efficient flights. while North America and Africa journeys were far more carbon inefficient.
Gössling added that the carbon footprint of passengers in first and business class was almost three times that of those in economy, and could be up to thirteen times greater in the most spacious cabins. The research team concluded that improving load factors while running efficient aircraft without premium seating could slash industry emissions by 50-75%, all without cutting any journeys.
The study’s recommendation to fly only economy seating on all flights goes against the industry trend towards premiumisation. In recent years, airlines including American have been going all-out on luxury interior redesigns to win over higher-spend passengers. The industry has been banking on CORSIA and sustainable aviation fuel (SAF) to decarbonise. Linnaeus University’s research identifies much more effective measures, but these are incompatible with customer preferences and airline identities. Sustainability thus remains the elephant in the room in the aviation conversation.
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by Elsie Clark | Dec 10, 2025 | Sustainability
IATA has published its latest sustainable aviation fuel (SAF) production figures and issued a stark warning as the industry looks set to miss key targets.
SAF production has doubled from 2024, reaching 1.9 million tonnes (Mt) by the end of 2025, according to IATA. However, these numbers full short of earlier forecasts, and in 2026 the production rate is projected to slow and reach only 2.4Mt.
IATA lists policies in Europe, including the EU’s ReFuelEU Aviation and UK SAF mandates, as key hindrances. They say these schemes have pushed high SAF costs onto airlines and fail to nurture a stable supply chain. In a strongly-worded statement, Director General Willie Walsh emphasised the urgency of change:
SAF production growth fell short of expectations as poorly designed mandates stalled momentum in the fledgling SAF industry. If the goal of SAF mandates was to slow progress and increase prices, policymakers knocked it out of the park. But if the objective is to increase SAF production to further the decarbonisation of aviation, then they need to learn from failure and work with the airline industry to design incentives that will work.
Marie Owens Thomsen, IATA’s Senior Vice President for Sustainability and Chief Economist, said it would be ‘outrageous’ if regulators were to take the same approach with forthcoming e-SAF mandates. e-SAF already suffers from a much-higher cost base than conventional SAF due to the costs of renewable energy supplies.
Regardless, IATA say the failures of SAF so far have already complicated sustainability targets. Walsh adds:
Regrettably, many airlines that have committed to use 10% SAF by 2030 will be forced to reevaluate these commitments. SAF is not being produced in sufficient amounts to enable these airlines to achieve their ambition. These commitments were made in good faith but simply cannot be delivered.
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by Elsie Clark | Dec 3, 2025 | Innovation, Sustainability
The aviation industry produces 868 megatonnes (Mt) of carbon dioxide every year, making it one of the highest-polluting industries on the planet. And while enthusiasm for sustainability is high, making air travel zero-carbon is a complex challenge, especially as passenger demand only continues to increase.
While sustainable aviation fuel (SAF) production scales, aviation must find other ways of limiting emissions as much as possible. Data is key to this endeavour, as it is only through reliably identifying emission sources that strategies can be developed to tackle them.
This is the mission of Estuaire, a Paris-based startup co-founded by CEO Maxime Meijers. For his innovative work in the field, Meijers was honoured as our Top Innovator at the Aerospace Tech Review Awards 2025. His passion for aviation emerged in his hometown in Toulouse, France’s aviation hub. But after spells at leading aerospace companies, including Airbus, Meijers decided he wanted to build his own business that could more proactively address aviation’s sustainability challenge.
He explains:
Estuaire has two product lines. The first is a data platform where we measure flight-by-flight their climate impact. So we ingest everything, trajectory, weather, aircraft type. Bsically, if you’ve flown a flight we can tell you precisely what this aircraft released in carbon and the associated impact on the environment.
The other side of the business looks at solutions for mitigating climate impact. Meijers’ special passion is reducing contrails: Estuaire estimate that contrails are responsible for over 150Mt of industry emissions.
Meijers and his team have developed a comprehensive index for measuring contrails in real-time, a product they are currently trialling with several airlines. According to their analysis, 2.9% of world flights generated 80% of the total radiative forcing effect of contrails. Rerouting a very small number of flights could therefore have a substantial impact on the climate.
End-to-end contrail management methodology by Estuaire.
Meijers wants to see greater regulation in this area to force further change:
The challenge is that there’s no financial incentives or penalties that push airlines to work on contrails. That’s really something we want to set in place.
Aside from encouraging the EU to act on contrails, Meijers’ ambition is to grow his team and expand their work on emissions monitoring and reduction. On being honoured as Top Innovator, Meijers said:
It’s an award I pass to the team, notably our tech team, because they’re doing the ground work and the quality of our data should speak for itself. So it goes to them first, and having these industry recognitions just encourages us to go further.
🎥 Watch the full interview to hear more about Maxime Meijers’ vision for Estuaire and emissions monitoring in aviation.
Questions asked include:
- Where did your passion for sustainable aviation come from? What was the inspiration behind Estuaire?
- What industry challenges does Estuaire seek to address through its business?
- Which initiatives that you or the company have led that you are most proud of?
- How are you looking to grow in the future? What would you like to do next?
- What is the biggest challenge aviation faces in becoming a sustainable, zero-carbon industry? What advice would you give to help tackle it?
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by Elsie Clark | Nov 24, 2025 | Innovation, Sustainability
Korean Air and Samsung E&A have signed a Memorandum of Understanding (MoU) to develop a sustainable aviation fuel (SAF) supply chain in the US.
The airline and the engineering firm’s announcement forms part of their commitment to accelerate sustainable energy solutions in aviation. Samsung E&A will build on existing feedstock capacity and infrastructure in the US with its engineering expertise. Meanwhile, Korean Air has signed to become a SAF buyer, ensuring critical long-term demand. Other airlines including Delta and Air France have struck similar agreements to nurture the SAF industry as it takes flight.
Samsung E&A is considering participating in a SAF project that uses gasification–Fischer-Tropsch (FT) technology. This second-generation SAF fuels converts abundant woody waste into synthetic liquid fuel, a significant advance on first-generation processes that use limited supplies of waste cooking oil.
On the partnership with Samsung E&A, a spokesperson for Korean Air commented:
This partnership will further contribute to the aviation industry’s Net Zero 2050 goal and enhance our ability to effectively navigate evolving global environmental regulations, including SAF mandates. Through proactive project participation and continuous cooperation, we aim to accelerate global SAF adoption and advance our commitment to sustainable aviation and ESG management.
A report from IATA earlier this year found that SAF production is currently on track to fall 100 million tonnes short of net-zero emissions targets. The air transport association emphasise that investing in technology, not feedstock, was critical to ramping up sustainability efforts. If successful, Korean Air and Samsung’s new partnership will contribute directly to addressing this issue.
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by Elsie Clark | Nov 14, 2025 | Flight Ops IT, Innovation
Vietnam Airlines has adopted Lido 4D Flight Planning software for better operational safety and efficiency.
Produced by Lufthansa Systems, the tool enhances real-time situational awareness with updates from weather stations and air traffic control. Sustainability is also a focus, with Lido 4D helping airlines reducing unnecessary emissions and chart optimal flight paths. The solution is a significant step above traditional semi-automated processes, allowing pilots to make decisions more dynamically and adapt to changing circumstances more rapidly.
To Ngoc Giang, Executive Vice President at Vietnam Airlines, commented,
With the support from Lufthansa Systems, we are well-positioned to navigate the challenges and opportunities of the future, reinforcing our status as a premier airline in Asia and beyond.
Other airlines who have adopted Lido 4D include ANA, Emirates, and Malaysia Airlines. Vietnam Airlines currently holds a 4-star rating on Skytrax. Tech investment hopes to put them on equal footing with top airlines in APAC and achieve that coveted 5-star rating. More efficient planning will not only reduce their carbon emissions, but pass on benefits to customers such as smoother flights and improved on-time performance (OTP).
Lufthansa Systems, the in-house innovation team from German airline Lufthansa, supports over 350 customers. Vietnam Airlines adds Lido 4D Flight Planning to its existing suite of Lufthansa Systems solutions,, including mPilot, Lido FMS, and Lido AMDB.
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