Ideas
The AI Boom Needs Carbon Removal
The CEO of Climeworks argues that the buildout of technology to suck greenhouse gas from the air should be considered part of the cost of artificial intelligence.
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The CEO of Climeworks argues that the buildout of technology to suck greenhouse gas from the air should be considered part of the cost of artificial intelligence.
Though the tech giant did not say its purchasing pause is permanent, the change will have lasting ripple effects.
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Jason Hochman is building an archive of intellectual property from failed direct air capture companies.
Microsoft dominated this year.
With new corporate emissions restrictions looming, Japanese investors are betting on carbon removal.
It’s not a great time to be a direct air capture company in the U.S. During a year when the federal government stepped away from its climate commitments and cut incentives for climate tech and clean energy, investors largely backed away from capital-intensive projects with uncertain economics. And if there were ever an expensive technology without a clear path to profitability, it’s DAC.
But as the U.S. retrenches, Japanese corporations are leaning in. Heirloom’s $150 million Series B round late last year featured backing from Japan Airlines, as well as major Japanese conglomerates Mitsubishi Corporation and Mitsui & Co. Then this month, the startup received an additional infusion of cash from the Development Bank of Japan and the engineering company Chiyoda Corporation. Just days later, DAC project developer Deep Sky announced a strategic partnership with the large financial institution Sumitomo Mitsui Banking Corporation to help build out the country’s DAC market.
Experts told me these investments probably won’t lead to much large-scale DAC deployment within Japan, where the geology is poorly suited to carbon sequestration. Many of these corporations likely don’t even plan to purchase DAC-based carbon offsets anytime soon, as they haven’t made the type of bold clean energy commitments seen among U.S. tech giants, and cheaper forestry offsets still dominate the local market.
Rather, contrary to current sentiment in the U.S., many simply view it as a fantastic business opportunity. “This is actually a great investment opportunity for Japanese companies now that the U.S. companies are out,” Yuki Sekiguchi, founder of Startup Navigator for Climate Tech and the leader of a group for the Japanese clean tech community, told me. “They get to work with really high caliber startups. And now everybody’s going to Japan to raise money and have a partnership, so they have a lot to choose from.”
Chris Takigawa, a director at the Tokyo-based venture firm Global Brain, agreed. Previously he worked at Mitsubishi, where he pioneered research on CO2 removal technologies and led the company’s investment in Heirloom. “Ultimately, if there’s going to be a big project, we want to be part of that, to earn equity from that business,” he told me of Mitsubishi’s interest in DAC. “We own large stakes in mining assets or heavy industrial assets. We see this as the same thing.”
Takigawa said that he sees plenty of opportunities for the country to leverage its engineering and manufacturing expertise to play a leading role in the DAC industry’s value chain. Many Japanese companies have already gotten a jump.
To name just a few, NGK Insulators is researching ceramic materials for carbon capture, and semiconductor materials company Tokyo Ohka Kogyo is partnering with the Japanese DAC startup Carbon Xtract to develop and manufacture carbon capture membranes. The large conglomerate Sojitz is working with academic and energy partners to turn Carbon Xtract’s tech into a small-scale “direct air capture and utilization" system for buildings. And the industrial giant Kawasaki Heavy Industries has built a large DAC pilot plant in the port city of Kobe, as the company looks to store captured CO2 in concrete.
During his time at Mitsubishi, as he worked to establish the precursor to what would become the Japan CDR Coalition, Takigawa told me he reached out to “all the companies that I could think about that might be related to DAC.” Most of them, he found, were already either doing research or investing in the space.
Japan has clear climate targets — reach net-zero by 2050, with a 60% reduction in emissions by 2035, and a 73% reduction by 2040, compared to 2013 levels. It’s not among the most ambitious countries, nor is it among the least. But experts emphasize that its path is stable and linear.
“In Japan, policy is a little more top down,” Sekiguchi told me. Japan’s business landscape is dominated by large conglomerates and trading companies, which Sekigushi told me are “basically tasked by the government” to decarbonize. “And then you have to follow.”
Unlike in the U.S., climate change and decarbonization are not very politically charged issues in Japan. But at the same time, there’s little perceived need for engagement. A recent Ipsos poll showed that among the 32 countries surveyed, Japanese citizens expressed the least urgency to act on climate change. And yet, there’s broad agreement there that climate change is a big problem, as 81% of Japanese people surveyed said they’re worried about the impacts already being felt in the country.
The idea that large corporations are being instructed to lower their emissions over a decades-long timeframe is thus not a major point of contention. The same holds for Japan’s now-voluntary emissions trading scheme, called the GX-ETS, that was launched in 2023. This coming fiscal year, compliance will become mandatory, with large polluters receiving annual emissions allowances that they can trade if they’re above or below the cap.
International credits generated from DAC and other forms of carbon removal, such as bioenergy with carbon capture and storage, are accepted forms of emissions offsets during the voluntary phase, making Japan the first country to include engineered credits in its national trading scheme. But to the dismay of the country’s emergent carbon removal sector, it now appears that they won’t be included in the mandatory ETS, at least initially. While a statement from the Chairman and CEO of Japan’s Institute of Energy Economics says that “carbon removal will be recognized in the future as credits,” it’s unclear when that will be.
Sekiguchi told me this flip-flop served as a wake-up call, highlighting the need for greater organizing efforts around carbon removal in Japan.
“Now those big trading houses realize they need an actual lobbying entity. So they created the Japan CDR Coalition this summer,” she explained. Launched by Mitsubishi, the coalition’s plans include “new research and analysis on CDR, policy proposals, and training programs,” according to a press release. The group’s first meeting was this September, but when I reached out to learn more about their efforts, a representative told me the coalition had “not yet reached a stage where we can effectively share details or outcomes with media outlets.”
Sekiguchi did tell me that the group has quickly gained momentum, growing from just a handful of founding companies to a membership of around 70, including representatives from most major sectors such as shipping, chemicals, electronics, and heavy industry.
Many of these companies — especially those in difficult to decarbonize sectors — might be planning for a future in which durable engineered carbon offsets do play a critical role in complying with the country’s increasingly stringent ETS requirements. After all, Japan is small, mountainous, densely populated, and lacks the space for vast deployments of solar and wind resources, leaving it largely dependent on imported natural gas for its energy needs. “We’ll always be using fossil fuels,” Takigawa told me, “So in order to offset the emissions, the only way is to buy carbon removals.”
And while the offset market is currently dominated by inexpensive nature-based solutions, “you have to have an expectation that the price is going to go up,” Sekiguchi told me. The project developer Deep Sky is certainly betting on that. As the company’s CEO Alex Petre told me, “Specifically in Japan, due to the very strong culture of engineering and manufacturing, there is a really deep recognition that engineered credits are actually a solution that is not only exciting, but also one where there’s a lot of opportunity to optimize and to build and to deploy.”
As it stands now though, the rest of the world may expect a little too much of Japan’s nascent DAC industry, experts told me.
Take the DeCarbon Tokyo conference, which was held at the beginning of December. Petre, Sekiguchi, and Takigawa all attended. Petre’s takeaway? “Deep Sky is not the only company that has figured out that Japan is really interested in decarbonization,” she put it wryly. DAC companies Climeworks and AirMyne were also present, along with a wide range of other international carbon removal startups such as Charm Industrial, Captura, and Lithos Carbon.
Overall, Sekiguchi — who attended the conference in her role as a senior advisor to the Bay Area-based AirMyne — estimated that about 80% of participants were international companies or stakeholders looking for Japanese investment, whereas “it should be the other way around” for a conference held in Tokyo.
“I think there’s big potential, Japan can be a really big player,” she told me. But perhaps Americans and Europeans are currently a little overzealous when it comes to courting Japanese investors and pinning their expectations on the country’s developing decarbonization framework. “There’s so much hope from the international side. But in Japan it’s still like, okay, we are learning, and we are going steadily but kind of slowly. So don’t overwhelm us.”
In some cases, rising electricity rates are the least of a company’s worries.
Skyrocketing electricity prices are hitting Americans hard, which makes one wonder: Are electrification-based technologies doomed? No doubt sectors like green hydrogen, clean fuels, low-carbon steel and cement, and direct air capture would benefit from a hypothetical world of cheap, abundant electricity. But what happens if that world doesn’t materialize anytime soon?
The answer, as it so often turns out, is significantly more complicated than a simple yes or no. After talking with a bunch of experts, including decarbonization researchers, analysts, and investors, what I’ve learned is that the extent to which high electricity prices will darken the prospects for any given technology depends on any number of factors, including the specific industry, region, and technical approach a company’s taking. Add on the fact that many industries looking to electrify were hit hard by the One Big Beautiful Bill Act, which yanked forward deadlines for clean hydrogen and other renewable energy projects to qualify for subsidies, and there are plenty of pressing challenges for electrification startups when it comes to unit economics.
“Having lower energy prices is good for everybody,” Bryan Fisher, a managing director at the energy think tank RMI focused on industrial decarbonization, told me simply. And so when those prices go up, “the biggest macro theme is it hurts industries or applications of industry unevenly — green hydrogen being the biggest one.”
There was a general consensus among the people I spoke with that electrolytic hydrogen — known as green hydrogen if it’s produced with renewable electricity — is the clearest casualty here. That’s unsurprising given that electricity drives roughly 60% to 70% of its production cost, as it powers the process that splits water into hydrogen and oxygen. Rising hydrogen costs will also have knock-on effects across other emergent industries, as many companies and investors are banking on green hydrogen to replace fossil fuels in hard-to-electrify sectors such as chemical production or long-haul transport.
Fisher told me that rising electricity costs now means that the transition from blue hydrogen — produced from natural gas feedstock, with carbon capture and storage to control emissions — to green hydrogen will be prolonged. “What we always thought was going to happen was that a blue hydrogen market would develop and be replaced by green as those costs went down,” Fisher explained. “So I think the time at which the market will utilize low-emissions blue hydrogen is just extended.”
Dan Lashof, the former U.S. director and a current senior fellow at the World Resources Institute, told me that if and when hydrogen projects scale, circumventing the rising costs of grid electricity with behind-the-meter renewable power could be a viable option, given that new wind and solar generation remains quite cheap. He also emphasized the other factors at play when it comes to making green hydrogen economically feasible — mainly the high cost of electrolyzers themselves, the devices that split water into its component parts. “Tariffs on Chinese imports are going to be a big factor in terms of electrolyzer costs,” he told me. That leads him to ask, “will other countries like India step up and be able to produce low cost electrolyzers for the U.S. market?”
Among industries that rely on green hydrogen, sustainable aviation and green shipping might suffer the most, as hydrogen is a necessary ingredient in certain net-zero fuels. But high electricity prices — and by extension green hydrogen costs — are far from their only financial concern. Producing clean fuels often requires combining hydrogen with captured carbon to synthesize hydrocarbons.Sourcing and capturing CO2, breaking it down into carbon monoxide, and synthesizing hydrocarbons are all expensive in and of themselves.
Fisher told me that when it comes to the category of sustainable aviation fuels known as e-SAF, which is made from green hydrogen and captured carbon dioxide, innovations in these other areas — as well as economies of scale — are more likely to make a meaningful dent in fuel prices than cheaper electricity. “Power prices going up 20% adds about $1 or $1.50 a gallon to e-SAF,” he explained. “And right now we’re probably $5 to $7 out of the money.” So while lower electricity prices would certainly be welcome, the industry needs cost breakthroughs on multiple fronts before this fuel has a shot at competing.
Some companies, including Twelve, require electrolyzers to break down both CO2 and H2O. Rajesh Swaminathan, a partner at Khosla Ventures, told me he simply doesn’t think the current approaches to e-SAF will get there economically. “It’s a terrible economic idea. It doesn’t pass any kind of sniff test,” he said. “Even if electricity prices were extremely low, this will not be competitive from a capex and opex perspective,” he said, referring to both capital expenditures and the cost of operating the business.
Khosla has instead invested in Lanzatech, which sources carbon-rich gases from industrial facilities such as steel mills and ferments them into ethanol, which can then be chemically converted into jet fuel. Its core process doesn’t rely on green hydrogen or electrolysis at all. “That’s such a low-cost approach that will meet the SAF targets of $4 per gallon,” Swaminathan told me — a claim that remains to be seen, of course.
Efforts to decarbonize high heat industrial processes such as steel and cement production also rely heavily on electrification. The clean cement company Sublime Systems and clean steel companies Boston Metal and Electra, for instance, all use electricity-driven chemical processes to replace the need for burning fossil fuels in either cement kilns or the blast furnaces used in steel production.
The companies themselves often emphasize the importance of low electricity prices for making this tech cost-competitive. For example, when Boston Metal’s CEO Tadeu Carneiro was asked by a Time magazine reporter two years ago about where the company would source the enormous amount of electricity needed to melt iron ore as planned, he replied, “If you don’t believe that electricity will be plentiful, reliable, available, green, and cheap, forget about it,” essentially acknowledging the tech won’t pencil out in the absence of cheap power. He added that there are regions such as Quebec and Scandinavia — both of which have abundant hydropower resources — where it would make economic sense to deploy Boston Metal’s tech sooner rather than later. Similarly, Sublime is building its first commercial-scale clean cement plant in Holyoke, Massachusetts, where it’s sourcing power from the city’s hydroelectric dam.
“We have to believe that the electricity will be available,” Carneiro told Time.
Lashof told me that in the meantime, higher electricity prices will “push industrial decarbonization more towards using carbon capture and sequestration pathways” over electrification-driven approaches. But Fisher thinks that in many cases there’s still “headroom” for electrification of power and heat to make sense domestically, even with a relatively significant “20% to 30% type increase” in electricity costs.
“If you’re doing a heat by electrification project at your industrial site, in some cases it’s an adaptive problem, not an economic problem.” he told me. Indeed, plants will need to be redesigned — no small cost in itself — and teams must be willing to change their systems and processes to accommodate new technologies. That organizational inertia could, in some cases, prevent the adoption of novel electrification tech, even if electricity prices would support it.
One technology that Fisher is absolutely certain isn’t constrained by electricity prices so much as the lack of a fundamental technical breakthrough is engineered carbon removal, such as direct air capture. “Innovation is the key, not low power prices, because we need to get from $500 bucks a ton in carbon removal to $50 bucks a ton,” he told me. While DAC certainly requires loads of electricity to pull CO2 out of the air and chemically separate it, that won’t be enough to conjure the 90% price reduction necessary before DAC can reach scale.
But rest assured, rising electricity prices will also create some winners, with energy efficiency likely to be at the top of the list, Duncan Turner, a general partner at venture capital firm SOSV, told me. Personally, he’s excited about everything from innovations in HVAC systems to companies developing more energy-efficient chemical separation processes, low-power light-based data transfer hardware for data centers, and plasma-based cooling products for computing chips.
Energy efficiency isn’t the only category he thinks stands to benefit. “There’s a bunch of long-duration energy storage companies that will look very interesting indeed as the price of electricity starts to go up and the demand for electricity from data centers starts to peak,” Turner told me. Like Fisher, he also sees an opportunity for point-source carbon capture, viewing it as a way to “very quickly get cheaper and cleaner electricity onto the grid.”
Moments like these are also when investors are quick to remind us that betting on consistency across seemingly any dimension — whether that’s clean energy incentives, the funding environment, or commodity prices — is often a losing strategy. Or, as Turner put it, “It’s probably for the good for the whole industry — our community as a whole — that we reset to, We work better than anything else, even when there’s expensive electricity.”