Aviation: Decarbonising Through Operational Efficiency and SAF
First, Aviation. Air travel continues to grow globally.
And while aviation remains one of the hardest sectors to decarbonise, our focus has been engaging on real operational decarbonisation – not simply offsets.
Singapore Airlines, our portfolio company, today operates one of the world’s youngest and most fuel-efficient fleets.
Its average fleet age is seven years and nine months1 – versus the global industry average of over 15 years.
Its next-generation passenger aircraft are expected to improve fuel efficiency by around 25%, while its new Airbus freighters are expected to improve fuel efficiency by around 40% relative to the aircraft they replace2.
In cargo operations alone, the new freighters are expected to reduce emissions by about 400,000 tonnes annually.
At the same time, sustainable aviation fuel, or SAF, will be critical to aviation’s long-term decarbonisation pathway.
Today, SAF accounts for less than 1% of global jet fuel supply and remains around two to five times more expensive than conventional jet fuel.3
This is why we believe a systems-level approach is required – spanning burden sharing, financing, regulations, infrastructure, supply, and off-take to allow decarbonisation in the aviation sector
Temasek has been working together to help catalyse SAF solutions and markets – from purchasing SAF credits that helps bring down the green premium in partnership with SIA, to investing in SAF through our respective platforms and subsidiaries.
SIA is also taking concrete steps to accelerate SAF adoption – from piloting SAF on flights and building internal capabilities, to partnering with producers and ecosystem players to secure supply and help scale the market.
On 15th May, there was an FT article on SIA increasing flights arising from the Gulf War disruption.
As a shareholder, we are, of course, pleased with this, but on the other hand, with our sustainability cap on, we lament the increase in the emissions arising from this.
But if SIA does not do well, it will be debilitated from doing the right thing in terms of fleet renewal and SAF adoption.
Energy Transition: Balancing Reliability, Affordability and Decarbonisation
The second factor relates to the realities of the global energy transition.
Given the fast-growing global demand for energy and geopolitical volatility, countries are increasingly prioritising energy security, affordability, and grid stability alongside longer-term decarbonisation goals.
This is why we are supportive of Sembcorp Industries’ acquisition of Alinta Energy in Australia.
Alinta’s diversified portfolio of power generation assets positions it well to support Australia’s energy transition.
Renewables will drive decarbonisation and account for most future capacity growth. But during the transition, thermal baseload power will continue to play an important role in maintaining grid stability and affordability.
For example, Alinta’s coal plant currently supplies around 20% of Victoria’s electricity demand, while also providing the system stability needed to integrate more renewables into the grid.
At the same time, Alinta has a clear pathway towards a cleaner energy mix over time:
While its portfolio today still includes coal and gas, the direction of travel is firmly towards renewables and storage – supported by flexible gas capacity to maintain grid reliability as the transition progresses.
As a result, although Sembcorp’s emissions intensity may rise in the near term following the acquisition, it is expected to decline steadily over time – remaining aligned with its 2050 net zero ambition.
Now, this is what a just transition looks like in practice.
The reality is that the world cannot transition overnight.
A credible transition is not simply about shutting assets down quickly – it is about replacing them responsibly, while preserving energy security, affordability, and grid reliability along the way.
Continuing the Transition
As a long-term investor, we continue to pursue our climate ambition in three ways:
First, we deploy capital towards investments aligned with our Sustainable Living trend.
As of 31 March 2025, I can’t yet disclose the numbers for 2026 but it is better – the portfolio value for our Sustainable Living investments reached S$46 billion4, or 11% of our portfolio value.
Over the past year, we have continued to build on the positive momentum in our capital deployment on this front, towards areas such as renewable energy, electrification, climate technologies, industrial decarbonisation, and energy resilience.
The most recent was when we joined the Wallenberg group of Sweden, in providing more capital to a portfolio company called Stegra, which is involved in the transition into green steel, with a view to make sure that there is adequate financing to achieve the goal set forth by the original business plan.
Second, we continue engaging our portfolio companies – particularly those in hard-to-abate sectors – to support their efforts to reduce emissions and improve carbon intensity over time.
Third, we embed climate considerations directly into our investment decisions. We apply an internal carbon price – currently US$65 per tonne of CO2 equivalent – with a goal to reaching US$100 by 2030. We also link compensation to sustainability goals, supported by an integrated ESG framework embedded across our investment process.
Beyond our portfolio, we are also helping to close critical market gaps through platforms which are designed to accelerate climate solutions at scale.
For example, Decarbonization Partners, our joint venture with BlackRock, with a combined US$600 million in initial capital from the both of us to invest in growth-stage technologies that can accelerate decarbonisation across energy, industry, mobility, and materials.
And GenZero, our platform which we launched with an initial US$5 billion capital commitment, to focus on enabling real-world decarbonisation through transition financing, carbon markets, nature-based solutions, and climate infrastructure.
Through GenZero, Climate Impact X, and initiatives such as TRACTION, we also support high-integrity voluntary carbon markets, which are necessary for nature-based solutions and for addressing emissions in hard-to-abate sectors as well as emerging markets where the economics of transition remain challenging.
Ultimately, the transition will not succeed through ambition alone. It will require scalable solutions, long-term capital, and disciplined execution in the real world.
Staying Committed: Ambition with Realism
This brings us to the central challenge before us: how to sustain climate ambition in a far more constrained world.
That starts with addressing the green premium.
Solutions must be scalable, financeable and deployable within credible timeframes, especially in emerging markets where affordability matters most.
It also requires a fundamental shift in how the transition is financed.
Innovative financing structures are critical to better allocate risk and return across the capital stack.
Subsidies and concessional capital remain important – but are insufficient on their own.
When deployed strategically, concessional capital can help de-risk projects and crowd in significantly larger pools of commercial and institutional capital – across both new green projects and the transition of existing systems.
Temasek has set aside $100 million to deploy as concessional capital for systematised climate financing structures.
One way this is being done is through the Green Investments Partnership, or GIP – under Singapore’s Financing Asia’s Transition Partnership blended finance initiative – which we have contributed to.
Managed by Pentagreen, our joint venture with HSBC, GIP has achieved its first close with US$510 million in committed capital, which will be deployed into sustainable infrastructure opportunities, including marginally bankable ones, across Southeast and South Asia where funding gaps are faced. It is the largest blended financing vehicle in Southeast Asia.
If you are here for the next few days, you will hear more announcements on this, so stay tuned.
This underscores a broader point: without scalable financing, even the most promising climate solutions will struggle to deploy.
Scaling the Transition – with Pragmatism and Commitment
Multiple Pathways, One Transition
We recognise that financing, by itself, is not enough.
The transition will require multiple pathways – unfolding at different speeds across sectors, technologies, and markets.
As clean alternatives scale and become commercially viable, legacy assets can be progressively phased out.
In the end, sustaining the transition is not just about multiple pathways. It is also about long-term commitment – and the resolve to follow through, even when the path becomes harder.
Staying Front-Footed Through the Transition
As a generational investor, we remain fully committed to our climate targets, including the ambition of achieving net zero by 2050.
Timelines may evolve – but it is not about lowering ambition.
It is about ensuring that we can follow through responsibly and sustainably over the long term.
In today’s constrained environment, we must remain front-footed – navigating near-term volatility while staying anchored to long-term outcomes.
Nowhere is this balance more critical than in Asia – where energy demand is growing at its fastest pace, driven by China, India, and Southeast Asia.
According to the IEA, global electricity demand is expected to grow at least two-and-a-half times faster than overall energy demand through 2030.5
Much of this growth is concentrated in emerging economies, which account for nearly 80% of additional electricity consumption.
Yet many economies in Asia remain reliant on imported fossil fuels and are highly exposed to climate risks.
This sharpens the trade-offs between growth, energy security, affordability and decarbonisation.
Encouragingly, despite these trade-offs, we are seeing clear forward momentum in electrification and renewable energy, led by China and increasingly extending across emerging Asia.6
In this new reality, what matters is not perfection, but progress at scale – across real assets, real markets, and real-world impact.
Closing
So let me conclude, at last.
The world today is more complex, more constrained and more fragmented.
But the long‑term direction remains clear: we are moving towards a climate‑impacted future.
The journey will be harder and less linear – but it is one we must continue, because the cost of inaction is far higher.
To move forward, we must strengthen the systems that make real-world decarbonisation possible.
In 1962, United States President John F. Kennedy said famously about the US’ ambition to land a man on the Moon: “We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organise and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one which we are unwilling to postpone, and one which we intend to win, and the others, too.”7
The quest for net zero by 2050 demands that same spirit of ambition and resolve.
It will require all of us – governments, businesses, financial institutions, philanthropic organisations, innovators, and societies – to contribute whatever resources we can spare, and whatever capabilities we possess, to build a better and more sustainable future.
Ravi Menon, Singapore’s Ambassador for Climate Action, quoted a saying in a speech last month: “We don’t inherit the Earth from our ancestors; we borrow it from our children.”
Those words remind us what is truly at stake – the decisions we make now will shape not only our own future, but the future of generations to come.
That is why Ecosperity matters.
It is a platform for collective action and renewed commitment.
A place where all of us can come together to deepen dialogue, catalyse solutions, and mobilise capital at scale.
Because no single institution, market or technology can drive this transition alone.
We all must stay committed – and seek to translate the realism of today into optimism for tomorrow.
I am reminded that Temasek was founded back in 1974 in such a time as this; against the backdrop of two major wars, one of which was at our doorstop; an oil crisis, as well as rocketing inflation and cratering financial markets. We persevered and came out positively, as many others did as well.
So I would ask all of us to commit To Do Well, To Do Right and To Do Good – Doing Things Today with Tomorrow clearly on our Minds – So Every Generation Prospers.
Thank you, and I wish you all a fruitful Ecosperity Week ahead.
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4Made up of listed and unlisted investments aligned with the Sustainability Living trends, and excludes other assets and liabilities