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The buzzy clean energy tax credit marketplace expanded into debt right in the nick of time.

The Inflation Reduction Act opened up a whole new avenue for project financing when it allowed clean energy developers to sell the tax credits that they earned on their projects to any willing buyer on the open market. It also opened up a lucrative fintech opportunity: A digital marketplace where buyers and sellers of these credits could easily transact.
One of the first — and certainly most successful — startups to jump on this opportunity was Crux Climate. But by the time Crux announced its $50 million Series B funding round last month, however, some Congressional Republicans were already considering axing tax credit transferability in their budget proposal. Then last week, the House of Representatives’ Ways and Means committee followed through on this rumored threat, proposing a plan to get rid of transferability for all credits by 2028 (though the details are still in flux). So what’s to become of Crux now?
Everything’s going to be okay, Crux’s co-founder CEO Alfred Johnson told me late last week. In fact, “the business is in great shape,” he said. I was a tad confused. But as Johnson reminded me, the company always planned on being more than a mere tax credit marketplace. The question is whether developers will buy into this vision of Crux as the everything store for project financing.
In March, right before the company announced its Series B, Crux launched a debt marketplace, where developers and manufacturers can access financial tools such as short-term bridge loans, construction financing, and flexible lines of credit to fund the buildout of renewables projects. “The market size for transferable credits is $30 billion per year, while the market size for project finance debt is more than seven-and-half times as big: $230 billion,” Johnson told me.
This new offering may have come just in the nick of time. It’s also likely just the first in a series of platform expansions, some of which are already in the works.
“There are many more multibillion-dollar markets among the thousands of developers, manufacturers, investors, and corporate buyers that make up the market for U.S. energy and manufacturing project finance,” Johnson told me. Playing in all those markets is a lofty goal for a company that was founded just two years ago, but so far Crux has been good at defying expectations. After all, it’s been profitable since its second year, Johnson told me, a rare and rapid rise for an early-stage startup.
Crux shared some exclusive numbers with me that illustrate some ways in which it’s starting to outgrow its roots. For one, Johnson told me that Crux’s revenue for the first one-and-a-half quarters of this year is nearly 10 times higher than for the same period last year. While he wouldn’t reveal what portion of that was comprised of tax credit deals versus debt financing deals, he did say that in the two months since the debt marketplace launched, “lenders have issued $1.3 billion of term sheets.” Those are nonbinding loan offers, $700 million of which have turned into actual deals so far. “It took more than a year for the tax credit market to reach similar throughput," Johnson said.
In the meantime, Crux is by no means giving up on the embattled transferable tax credit marketplace. The company sounded a relatively optimistic note last week as it published a list of takeaways from the Ways and Means Committee’s proposal, stating, “This is the starting point and we anticipate that the final bill will take a more favorable stance on transferability and tax credits.” The company looks like it’s preparing to fight for that outcome, too, as a few months ago it hired new teams of tax lobbyists and brought on Hasan Nazar, former federal policy lead at Tesla, to direct these lobbying efforts.
Johnson said that the debut of Crux’s debt marketplace had developers, manufacturers, and investors rushing to its website in numbers not seen since the company launched. It logged more “inbound interest” on that one day in March than when it announced its Series A and its Series B — that is, more than on both of those days combined.
“We didn’t invest in Crux with the belief that this would be a transferable tax credit business forever,” David Haber, a general partner at Andreessen Horowitz, told me. The venture capital firm led the company’s $18.2 million Series A funding round. “We viewed that as a great wedge product to bootstrap a financial exchange that could help facilitate the types of financial products needed for this ecosystem,” he said. Clay Dumas of Lowercarbon Capital, which led Crux’s Series B, also saw the company as a so-called “wedge” into a “multi-hundred-billion-dollar opportunity to finance energy and advanced manufacturing through debt and a wide range of other products.”
Not all investors felt as confident that companies built around tax credit transferability could become a one-stop financing shop, however. As of now, most of Crux’s direct competitors — such as Basis Climate, Reunion Infrastructure, and Common Forge — haven’t expanded into other parts of the climate capital stack.
“We know the fundamental risk that a stroke of the pen can have in any of these sort of marketplaces,” Juan Muldoon, a partner at the climate software VC firm Energize Capital, told me. Thus far, Energize has not funded any tax credit-based marketplace, diligence platform, or underwriting tool. “We wanted to wait for signs of resilience and more complete platforms, more complete business models, versus solving for things that might be more transient in value,” Muldoon said. Last week’s committee proposals validate Energize’s core investment strategy, he added — supporting nimble software companies that can withstand political headwinds and change tacks quickly.
Crux certainly hopes that expanding into the debt market will put any fears of its potential transience to rest. After all, Johnson told me, “all parts of the capital stack are opaque, illiquid, bespoke and manual.” That includes not only transferable tax credits, but also debt and equity financing. “These are private transactions that require a ton of documentation, models, advisory lawyers. But it doesn't have to be as bad as it is,” he said.
But if the transferable tax credits do indeed disappear, many renewable energy developers may be forced to return to one of the most opaque funding mechanisms of all: tax equity financing, which Crux is not currently set up to facilitate. As my colleague Emily Pontecorvo recently explained, prior to the passage of the IRA, renewable energy developers who wanted to liquidate their tax credits had to partner with tax equity investors — usually banks — who would give them cash in exchange for an equity stake in their clean energy project and the benefits of their tax credits. But forming these types of partnerships is both legally complicated and costly, and thus not a viable option for many smaller developers.
Presumably, Crux could shake up and simplify this space, too. And while it’s made no official commitments to a tax equity product, the company’s website has been reconfigured to advertise it as the go-to platform to “source new opportunities for lending, equity, and tax credit transfers,” as it commits to “financing the future of energy.”
Crux has its work cut out for it, though, as often the more complex the financial transaction, the more customized it must be. “The competitors are offline advisors for the most part,” Haber told me. Thus, standardizing and digitizing as many esoteric and project specific elements of the capital stack as possible is going to be, as he put it, “their opportunity and their challenge.”
Johnson says Crux is up for it. “It’s never going to be, you know, one click buy it on Amazon. That’s a ridiculous and implausible concept for deals of this size and importance. But these negotiations and transactions can be so much better.” Efficiency, at the very least, seems to be something we can all get behind. So as the partisan fighting over tax credits and transferability commences and the clean energy incentives start to fall, maybe at least this one climate tech darling can weather the storm.
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“Engineered hydrogen” companies make up a hefty portion of the latest Activate Fellowship class, announced Tuesday morning — a reliable harbinger of investments to come.
The hype around clean hydrogen has come in waves, with investors and policymakers betting that the versatile molecule could help decarbonize everything from fertilizer production to long-haul shipping and heavy industry. Different production methods have come in and out of vogue: Around 2020 it was using carbon capture and storage, then electrolysis powered by clean electricity and subsidized by generous tax credits in the Inflation Reduction Act. More recently, venture capitalists have poured money into the search for naturally occurring deposits hidden underground.
So far, none of these approaches has delivered cheap, low-carbon at any kind of scale. Yet enthusiasm for this latest frontier — so-called geologic hydrogen — has continued to build.
Much of that excitement stems from an even newer concept, alternately known as engineered geologic hydrogen or engineered mineral hydrogen. This is the idea that if naturally occurring hydrogen deposits — which require a precise mixture of geologic conditions — prove too rare or difficult to find, scientists can engineer those subsurface conditions themselves, producing this valuable molecule straight from the earth wherever the right iron-rich rocks are found. Essentially, the approach trades exploration risk for engineering risk.
“I think it’s really a natural evolution,” Sophie Broun, CEO of the seed-stage engineered hydrogen company Anning Corporation, told me. “It’s the evolution that we’ve seen play out from oil and gas — conventional to unconventional — from geothermal to [enhanced geothermal systems], and now we’re seeing it in geologic hydrogen.”
Broun is a member of the new class of Activate Fellows announced on Tuesday morning. The two-year fellowship provides early-stage founders with funding for research and development, as well as a network of fellow founders, mentors, investors, and corporate partners. It’s helped seed cohorts of companies that have gone on to form brand new industries, from clean cement startups Brimstone and Sublime Systems to thermal energy players Antora Energy and Electrified Thermal Solutions.
Dan Recht, Activate’s chief fellowship officer, thinks that the nascent geologic hydrogen industry — which includes both natural and engineered deposits — is next. “This process of seeing these up and coming sectors and industries is routine for us at Activate,” he told me. “At the end of our selection process we now have a pretty good sense of, oh, the U.S. is going to have a geologic hydrogen industry.”
Of the 50 fellows selected this year, nine work in energy. Of those nine, three are hydrogen companies: geologic hydrogen startups Anning and Hydrify, as well as Brint Tech, which is developing hydrogen leak detectors. Anning is squarely an engineered hydrogen company, aiming to stimulate the production of the molecule underground using an undisclosed technology, while Hydrify is building tools to better locate where natural hydrogen deposits already exist.
Like Broun, Recht sees a clear parallel with the geothermal industry, where Fervo Energy is manipulating the subsurface to create the conditions necessary for geothermal power production and Zanskar is using artificial intelligence models to identify previously overlooked conventional geothermal resources. Anning could become the Fervo of hydrogen, while Hydrify could be its Zanskar, he told me. The parallels also extend beyond the companies themselves: The drilling techniques that underpin geothermal development — largely adapted from the oil and gas industry — stand to be just as critical to unlocking geologic hydrogen, which could give this emerging tech a similar bipartisan appeal.
Natural hydrogen company Koloma is by far the best capitalized startup in this space, having raised around $400 million from big-name backers such as Breakthrough Energy Ventures, Amazon’s Climate Pledge Fund, and Khosla Ventures. That said, it has yet to publish any results indicating it’s discovered commercially significant new deposits. That relative silence from the industry’s biggest player has helped fuel the dreams of the even-more-nascent engineered players such as Anning, Vema Hydrogen, Addis Energy, GeoKiln and Eden GeoPower, who think they can achieve quicker, more consistent breakthroughs.
“By being able to deploy the engineered solution, we’re able to be repeatable and scalable, and ultimately, that’s what customers and infrastructure providers need,” Broun told me. Being able to produce hydrogen closer to where it’s actually used could slash transportation costs, often one of the most expensive parts of the hydrogen value chain as the gas typically must be compressed or liquified before transport. “Being able to place that engineered system at a location that’s much more within your control, I think that that is a far stronger or more appealing business case in many cases,” she explained.
Anning raised a pre-seed round last year, and is now raising a $6 million seed round, which would put it more or less on par with other early players in the engineered hydrogen subsector. Vema has raised the most thus far, bringing in an oversubscribed $13 million seed round last February from a group of climate-focused investors including Extantia Capital and Propeller, and is now raising its Series A.
Vema drills its wells into iron-rich rock formations known as ophiolites, then injects water and a proprietary catalyst to trigger serpentinization, a natural geochemical reaction between water and iron minerals that produces hydrogen gas. While this process would typically unfold over millions of years, Vema says it’s aiming to speed up that reaction by a factor of 10,000 to generate commercial quantities of hydrogen on a human timeframe. The resulting hydrogen gas would then flow back to the surface through the well, where it would be purified before its delivery to customers.
The company’s senior vice president of operations, Colin McCulley, told me he expects that it can all be done for less than $1 per kilogram, the so-called “magic number where you start to compete with petroleum-derived hydrogen.” And Vema’s CEO, Pierre Levin, told TechCrunch that once the startup dials in its tech, the price will eventually drop to less than 50 cents per kilogram, making it definitively the cheapest form of hydrogen yet developed.
The company is currently conducting pilot testing in Quebec, home to the well-mapped Thetford Mines ophiolite deposits. But while Vema has yet to release any early results from this pilot, it’s already laying the groundwork for rapid commercialization. Late last year, Vema signed a conditional 10-year offtake agreement with the off-grid data center power startup Verne to supply up to 36,000 metric tons per year of hydrogen, with delivery expected to begin “as soon as 2028.” Then last week, the startup inked a nonbinding memorandum of understanding with Montreal-based sustainable aviation fuels developer SAF + International Group to supply 4,000 tons of hydrogen annually, also beginning “in approximately 2028.” The group will make that fuel at a facility co-located with Vema’s planned Quebec production site to minimize transport costs.
A report shared with me last month from the Cleantech Group, a San Francisco-based market intelligence and advisory firm, cast some doubts on that timeline, however. It called the 2028 target “over aggressive,” given that Vema will need to build a first of its kind facility to fulfill its deals with Verne and SAF + International Group.
“This is the Earth. This isn’t like your lab space where you can exactly control the pressure and temperature and conditions that exist downhole,” Diana Rasner, author of the report and the firm’s group lead for materials and chemicals, told me. “You’re going into territory you can’t see, or that you don’t know how it behaves day to day, let alone like on the scale of what you would think hydrogen production needs to be.”
Even McCulley admits that it’s a stretch, telling me that, “If we have realistic complexity in our project, it will be difficult to deliver on this timeline.” But he thinks the ambition is essential to demonstrate near-term demand and secure commitments for larger projects down the road. He expects the industry to really hit its stride between 2035 and 2040, by which point he says Vema could be looking at a fourth or fifth large-scale commercial project at costs competitive with fossil fuel-derived hydrogen.
But Vema is now facing competition from startups pursuing markedly different approaches to the same problem. Because heat is a natural accelerant of serpentinization, a company called GeoKiln is forgoing chemical catalysts altogether in favor of underground electric heaters designed to stimulate and speed up hydrogen production. Meanwhile, Eden GeoPower plans to apply high voltage electricity to fracture surrounding rocks, which also releases heat and exposes fresh reactive rock surfaces.
Then there’s Addis Energy, which is betting that ammonia production offers a stronger commercial proposition. Hydrogen is often an intermediate molecule in the process of producing ammonia, which is widely used in fertilizers and has become newly interesting for low-carbon shipping fuel. Addis aims to skip that conversion step entirely by injecting water, its own proprietary catalyst, plus a nitrogen-containing compound into the subsurface, triggering a chemical reaction that directly produces ammonia — a molecule that’s simple to transport using existing shipping infrastructure.
Eden raised a $12 million seed round in 2023, backed by a mix of oil and gas industry investors and sustainability-focused funds, while Addis raised a $8.3 million seed round late last year led by climate tech VC At One Ventures.
But investing in the space, Rasner told me, isn’t something everyone in the VC community is comfortable with these days. “It’s not to say that they didn’t believe in it,” she said of investors who did eventually pull the trigger. But it certainly wasn’t an easy decision. As promises of affordable, low-carbon hydrogen production have come and gone, there’s an undeniable aura of uncertainty around the industry, a feeling that has only grown stronger since the Trump administration curtailed clean hydrogen subsidies and froze funding for the previous Biden administration’s hydrogen hubs initiative.
With natural hydrogen players such as Koloma yet to deliver on their early momentum, Rasner told me many would-be backers are approaching the sector with a general attitude best summarized as, “You’re going to be able to do the thing that a lot of the big names in this space haven’t been able to prove out yet, but on your own terms? What’s the catch?”
Recht, however, naturally has a more optimistic outlook. The subsurface has long supplied the minerals that underpin our modern economy, and now it’s increasingly being tapped for geothermal energy as well. In his view, it’s only natural that it might be able to deliver the long-promised hydrogen economy.
“It turns out we’re really good at digging stuff up out of the ground cheaply. If you look at what has humanity decided to do with the past century, it’s to get good at that.”
Current conditions: New England is bracing for a series of severe thunderstorms this afternoon with the potential to cause widespread damage from winds and flooding • A firefighting helicopter crashed while battling Colorado’s Gold Mountain Fire, killing the pilot • Temperatures in Delhi, India, are nearing 100 degrees Fahrenheit today.
Dubai is planning to build a new port and container terminal on the United Arab Emirates’ east coast in a bid to circumvent the Strait of Hormuz and neuter Iran’s ability to leverage its control of the waterway toward geopolitical ends. On Monday, the Financial Times reported that DP World, the logistics giant and port operator based in the glitzy Emirati megacity, was working on a new port in the coastal area of Fujairah. The company’s Jebel Ali hub, located near the contested maritime route, has long served as “Dubai’s crown jewel.” But the newspaper said “shifting some of the port’s capacity outside Dubai marks a seismic change for the emirate, which has established itself as a global trade and finance hub partly off the back of Jebel Ali’s growth.” After all, activity at the port nosedived by as much as 95% after the United States and Israel began bombing Iran in February.
Meanwhile, the war appears to be back on. After resuming mutual attacks last week, President Donald Trump said Monday the U.S. would reinstate its blockade of Iran’s ports. “The U.S.A. will be, from this point forward, known as ‘THE GUARDIAN OF THE HORMUZ STRAIT,’” Trump wrote in a post on his Truth Social network.
With the world’s largest fleet of nuclear reactors, the U.S. has the capacity to pump out about 97 gigawatts of atomic energy. If every project now waiting in the pipeline goes forward, the country could nearly double that total capacity. A new analysis by the Breakthrough Institute, a think tank, found that the U.S. has 74 gigawatts of projects in various stages of development. “While it is unlikely that all of that capacity will ultimately be built, if even a fraction of it is deployed it would mark a historic turnaround for the U.S. nuclear industry,” Joy Jiang, an analyst at the Breakthrough Institute who authored the paper, wrote in a blog post. And more appears to be coming: New Jersey Governor Mikie Sherrill signed a bill Monday that creates a new procurement process for building a new nuclear plant in the state.
In Belgium, meanwhile, the government just approved nearly $12.5 million in funding for eight nuclear energy research projects as Prime Minister Bart De Wever seeks to reverse his country’s previous phaseout policy. On Monday, NucNet reported that the government wanted to restore nuclear power to its “rightful place” in the Belgian energy mix.
The International Brotherhood of Electrical Workers, or IBEW, added a record 30,000 new members so far this year, up from 24,000 a year ago. The milestone, announced Monday in a post on X, highlights a looming challenge for Democrats who are embracing the populist wing of the party’s calls for a moratorium on data center construction, no doubt a large part of what’s led to the recent hiring boom. “The building trades unions that the left’s major decarbonization agenda revolves around putting to work are further alienated by data center rejection (instead of regulation),” Fred Stafford, the pseudonymous socialist energy researcher and Heatmap contributor, wrote in a post on X. Still, the political dynamics are hard to pass up for left-wing candidates and advocacy groups. As Semafor reporter David Weigel wrote on X, moderates worry that coming out against a data center will activate opposition spending from the AI industry’s political action committees. “No such worries on the left, which wasn’t getting that money,” he wrote.
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Turkey is building its first nuclear plant and billions of dollars of new hydroelectric dams. But that doesn’t mean wind and solar don’t have a part. On Monday, Renewables Now reported that, over the weekend, the Turkish Ministry of Energy and Natural Resources published announcements for nearly two dozen renewable energy tenders scheduled for this year, with a target of deploying 2.4 gigawatts of new projects.
Shortly after the 2024 presidential election, Heatmap’s Katie Brigham declared “the death of ‘climate tech.’” By that, she meant that the incoming Trump administration would kibosh use of that two-word phrase to describe next-generation technologies that could generate power without emissions or reduce the impacts of global warming in other ways. But the sector is mounting quite a comeback. In the first half of this year, the global climate tech sector notched its busiest six months on record. A Bloomberg write-up of a new analysis by the market research firm Currence identified 153 transactions in the first half of 2026. That’s an eye-popping 70% hike from the same period last year.
It’s been 36 years since the signing of the Americans with Disability Act, yet the country remains tragically inaccessible to people who use wheelchairs, walkers, and canes. (For a disturbing account of just how bad things are in the nation’s largest city, listen to this old “This American Life” episode about lawyer and advocate Britney Wilson’s struggle to use Access-a-Ride, New York City’s para-transit provider.) It’s a problem Tesla aims to change. The auto giant is building a wheelchair-accessible self-driving taxi. But Electrek cautioned that Tesla “gave no timeline, no vehicle, and no details, and it’s not clear the ‘active product’ is anything more than the Robovan it unveiled nearly two years ago.” Nevertheless, I’d welcome its entry to the roads.
At this point, I think it’s clear that AI data centers are unpopular.
You probably know it, at least. I was preparing talk about data center opposition on a podcast today and I took the opportunity to dive back into our data, so I certainly know it. At this point, we’ve written about results from our polling that show Americans overwhelmingly oppose local data center construction, that majorities of Americans now support a national data center moratorium, and that the only group of Americans who feels more optimistic than pessimistic about artificial intelligence is … men older than 65 years old.
So I got curious: Given all that, who actually supports AI data centers?
One question from our recent Heatmap Pro poll, conducted by Embold Research, helps give us a sense. This is the profile of someone our data says would support a data center built in their local area:
A few facets stand out. These data center YIMBYs are more likely to be men, and more likely to be 2024 Trump voters, but they’re not locked into one age demographic or voting cohort. A third are Harris supporters, and roughly a third are women. Data center YIMBYs are more likely to be older than 50, but the majority isn’t overwhelming.
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Perhaps more surprising: The group has many more people who voted third-party in the 2024 election (8%) than the general population (just under 2%), although that response could also include people who didn’t vote. (Alas, the data can’t quite confirm how many in this group are libertarian.)
What’s perhaps most interesting: This group overwhelmingly believes that artificial intelligence will make their lives better. And in heartening news for climate advocates, they are even more likely to support a given data center project if it is powered by renewables.
I was going to joke that the profile is essentially a newly retired engineering dad — except that, to my surprise, these data center YIMBYs are far less gender imbalanced than the American engineering profession. (They’re also less gender-imbalanced than American Tesla owners.) So I’ll leave it at that.