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On Trump’s mineral paradox, China’s Great Green Wall, and sodium-ion batteries

Current conditions: After devastating the U.S. island of Rota in the Northern Mariana Islands territory, Super Typhoon Bavi is barreling toward Taiwan with winds of up to 200 miles per hour • Rare tornadoes brought on by storms touched down in China’s Hubei province, leaving 11 dead • Temperatures in Madrid are hovering at around 100 degrees Fahrenheit all week as the Spanish capital roasts in Europe’s latest heat wave.
Exactly three weeks after President Donald Trump signed a formal memorandum to halt the bombing campaign against Iran that the United States and Israel embarked on nearly five months ago, the war is back on. After Washington accused Tehran of launching missiles at tankers passing through the Strait of Hormuz this week, Trump officially declared the resumption of combat. Speaking Wednesday morning at the NATO summit in Turkey, Trump called the Iranian regime “scum,” “sick people,” and “vicious, violent people” when asked about the peace pact during a press conference. “If they had a nuclear weapon, they’d use it,” Trump said. “So as far as I’m concerned, it’s over.” He spent the rest of the day posting more than a dozen videos and photos on his Truth Social account purportedly showing U.S. missile strikes in Iran. “This is in retribution for yesterday’s bombing of ships by Iran,” Trump wrote in one post. “If it happens again, it will get much worse!”
The market is certainly preparing for worse. The price of Murban crude, the benchmark for oil flowing out of the United Arab Emirates, spiked nearly 7% on Wednesday. The European benchmark, Brent crude, jumped more than 5%. The American pricing yardstick, West Texas Intermediate crude, rose by just over 1%. Last month, my colleague Matthew Zeitlin cautioned that, despite a ceasefire, it would take a while for the Strait of Hormuz to return to normal — and “even longer” for energy markets. Emphasis on that last part.
The world’s capacity to generate nuclear energy has increased by 2.2 gigawatts already this year as new Chinese reactors have come online at a rapid clip. By 2035, global nuclear capacity is on track to surge by 44% to 535 gigawatts, up from 372 gigawatts last year. That’s according to the latest forecast from the consultancy BloombergNEF. China, the unrivaled global leader in domestic reactor construction, is largely responsible for the projected spike. Today, the People’s Republic is the world’s No. 2 user of atomic energy behind the U.S., which has long operated the largest fleet of plants on the planet. But China is on pace to surpass the U.S. by 2030 with 102 gigawatts of nuclear capacity.
Among the more promising signs for the democratic world: The U.S. is now working with Japan and South Korea to commercialize new small modular reactor technologies. On Tuesday, at the margins of the NATO summit, U.S. Secretary of State Marco Rubio signed onto a memorandum with the foreign ministers of Japan and South Korea. The document “outlines opportunities for our three countries, which have complementary advantages in the civil nuclear field, to encourage mutually beneficial cooperation among their respective nuclear industries,” the State Department said in a statement.
Right after the presidential inauguration in January 2025, Matthew wrote a sharp piece identifying what he called the “paradox of Trump’s critical minerals crusade.” At issue was the fact that the new Trump administration planned to (and ultimately did) kill off policies designed to spur demand for domestically mined and processed minerals such as lithium, cobalt, and rare earths — even as he slashed barriers to increasing the supply of those metals. U.S. production of minerals is picking up as the White House brokers a growing list of deals to give the government equity stakes in mining firms in exchange for federal support for increasing output. Sure enough, the demand just isn’t there in the U.S. On Tuesday, the Financial Times reported that companies backed by the administration, including rare earths miner MP Materials, uranium producer Energy Fuels, and the rare earths refiner Phoenix Tailings are instead selling their goods to buyers in Asia. Japanese customers were “clamoring” for rare earth metals from Phoenix Tailings, CEO Nick Myers said. The materials the firm produces are ending up “primarily in Korea and Japan.”
That isn’t stopping Trump from reviving his calls for Washington to seize Greenland and its resources from Denmark, a founding NATO ally. Speaking at the conference in the Turkish capital of Ankara, the American president repeated his claim that the U.S. invasion of the world’s largest island following Copenhagen’s collapse to Nazi blitzkrieg in April 1940 should have qualified as a permanent conquest. “We took Greenland and then, stupidly, we gave it back,” Trump told reporters. “We shouldn’t have given it back to them. We’re the ones who need it. We need it for protection of the world, not just the United States.”
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Not to be an old man about it, but I remember the Iraq War distinctly — the debates over the role of Baghdad’s oil and the calls from Congress for increased U.S. production with an eye toward energy independence. Here’s some data that will make you want to dismiss your humble millennial correspondent with an “ok boomer.” On Wednesday, the U.S. Energy Information Administration issued a definitive new analysis showing that U.S. petroleum exports hit a record high in April after Iran closed the Strait of Hormuz, forcing overseas buyers to find new sources of fuel. Exports increased to 13.6 million barrels per day, 15% more than the previous record set in March.
On the other end of the American energy spectrum, the nation’s largest provider of home battery and solar equipment just launched a distributed compute pilot program for artificial intelligence servers. Under the program, Sunrun will coordinate “the selling of inference capacity to enterprise compute buyers.” In other words, homeowners can earn money by hosting “compute nodes” — small servers —that then supply output to AI companies in much the same way Sunrun’s customers are paid by giving the virtual power plant operators access to solar panels and batteries. “Over nearly two decades, we have perfected our ability to operationalize, finance, and scale distributed assets,” Paul Dickson, Sunrun’s president and chief revenue officer, said in a press release. “We are now using our leadership position in distributed home energy and proven infrastructure to bring compute closer to the sources of energy and inference.”
Much like the United Nations effort to plant trees at the southern edge of the Sahara to keep the desert at bay, China is building a Great Green Wall. Since 1978, the country has planted 66 billion trees and plans another 34 billion by 2050 in a bid to slow the spread of the Gobi and Taklamakan deserts. A new study using satellite measurements of leafy areas found that the planted forests are greening much faster than wild ones. Younger trees grow faster. But even at similar ages, planted stands grew 4.6% faster, meaning they can absorb more carbon. The findings, according to Fertilizer Daily, “suggest global climate models should better distinguish forest types and age when accounting for carbon.”
Sodium-ion technology, as Heatmap’s Katie Brigham explained two years ago, promises cheaper, less combustible batteries than its dominant lithium-ion cousin. But it remains niche and underdeveloped. Perhaps not for long. On Wednesday, sodium battery startup Peak Energy announced plans for a factory in Sacramento capable of producing 4 gigawatt-hours of sodium battery systems annually. “America needs energy storage that is lower cost, more affordable, more reliable and purpose-built to meet the demand coming onto the grid,” Peak Energy CEO Landon Mossburg said in a statement. “This facility is proof that America can lead not only in inventing the technology, but in building it at scale.”
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The Iran war has been a gift to the country’s vehicle, solar, and battery business.
This is Heatmap Daily, a weekday evening digest written by our executive editor.
Happy Monday and welcome back. For months now, we’ve been talking about how the U.S. and Israel’s war in Iran has been a boon for electric vehicles, clean energy, and (unfortunately) coal.
But today we got data that confirms: This clean energy export boom is not just a side story. It is one of the brighter spots in the overall Chinese economy, which remains the world’s second largest.
According to economic data released on Monday, China grew 4.5% during the summer quarter as compared to the quarter from a year earlier. That means the country will likely hit its growth target this year, albeit on the low end.
The country’s economic expansion wasn’t driven by domestic consumption, however. Consumer confidence remains low, and residential investment has yet to return after the property crash earlier this decade.
Instead, booming exports are now driving China’s economy. Exports were more than 36% higher in September than a year earlier, driven by chips, ships, electric vehicles, and solar panels and batteries. The country will likely record its biggest trade surplus ever this year.
Some of those categories are clearly flourishing thanks to the global AI boom — think chips and even batteries. But the preponderance of vehicle exports suggests surging oil prices aren’t hurting. Sales of ‘new energy vehicles,’ a category that includes 100% electric vehicles and plug-in hybrids, were up more than 13% on a year-over-year basis in September, according to the Chinese car manufacturer’s trade group. But exports of these vehicles are booming. Battery electric vehicles were up 130% last month compared to the same period in 2025, and plug-in hybrid exports were up more than 200%.
It’s interesting to consider how much the Chinese and U.S. economy are mirroring each other at this moment. Americans are dealing with a remarkable investment boom, which is buoying the labor market and stubbornly maintaining high inflationary pressure. China is struggling with deflation, and exports are its quickest path to growth. (Consumer sentiment in both countries, interestingly, seems to be in the doldrums, even though American consumers appear to be in much better shape.)
When thinking about what artificial intelligence could do for the United States over the next decade, some subject-matter prognosticators (and even some Anthropic employees) imagine a world of 4%, 5%, or even 7% GDP growth. Such a growth rate is difficult even to envision in the modern era, of course, and it seems like it could propel the U.S. economy to staggering prosperity.
I know better than to make a prediction about where we’re headed. But amateur economic commentators should keep China in mind, too: a country that dominates along many technological axes, but where the standard economic math of supply, demand, and consumer sentiment still holds. Except if the United States economy were to stumble, no exterior source of demand will come to our rescue.
Endurance Energy hoped its generator would run for a full year, but the team isn’t afraid of the “error” in “trial and error.”
About 300 miles off the Oregon coast, a mile beneath the ocean’s surface, a startup just drilled the world’s first subsea geothermal well. And for a grand total of exactly 8.7 seconds, its prototype power plant generated about 2 kilowatts of net power. It wasn’t quite the result the Seattle-based Endurance Energy was hoping for — the company’s goal was to run its 100-kilowatt generator for a full year. But it’s not nothing.
“We really proved with this mission that a geothermal well could be drilled and completed on the seafloor, and doing that within 21 months of the company existing I think is really a testament to our pace of progress,” Endurance CEO Andrew Redd told me.
A former SpaceX engineer — as so many climate tech founders seem to be — Redd appears quite comfortable with the rapid trial-and-error cycles that hard tech startups often demand. Or as he stated in the company’s press release, which provides a refreshingly frank account of what this first test did and didn’t accomplish, “We follow the adage ‘make it exist, then make it good.’”
Investors seem to be buying it. In June, the startup raised a $54 million Series A, led by Peter Thiel’s Founders Fund — Endurance’s second funding round in less than two years of existence. Still, the team certainly has their work cut out for them. The ocean is a notoriously difficult operating environment: Saltwater is corrosive and offshore infrastructure is difficult and expensive to build, maintain, and repair.
Indeed, Endurance spent the first 11 days of its three-week stint at sea debugging its drill, which the team had never operated underwater before. But with a vessel chartered and a locked-in deployment date, the company couldn’t afford to wait for everything to work out perfectly. “We were still working on that generator hours before it got on the seafloor,” Redd told me. He’s used to that sort of thing, though, comparing it to making final tweaks to rockets already sitting on the launchpad. “That’s kind of the name of the game,” he said.
The trial took place at Axial Seamount, an active underwater volcano and the only place in the world with a cluster of hydrothermal vents connected to shore by fiber optic cable, which allows the Endurance team to monitor and control its system in real time from Seattle. While this was the company’s fifth deep-sea mission, it was the team’s first attempt to actually drill their own well.
After lowering their drill about a mile below the surface, the team bored two holes and turned the second into a well about 2 inches wide, lining it with pipe and sealing it with cement. But after losing so much time to debugging, the team only managed to drill about 52 feet deep — far short of its original 200-foot target.
Water then flowed up the well at about 260 degrees Celsius (around 500 degrees Fahrenheit), but the narrow borehole proved too restrictive to deliver enough heat for the generator to operate. So the team pivoted, connecting the generator directly to a naturally flowing, hotter hydrothermal vent instead. The generator then ran for a total of 29 seconds, producing about 2 kilowatts of net power for 8.7 seconds. That represents the total electricity the turbine generated, minus the 7 to 8 kilowatts needed to run its supporting components, such as the refrigerant pump and other onboard equipment.
Then a software glitch triggered the onboard battery safety system, which shut down the plant. When the team tried to restart the system, the power cable feeding the refrigerant pump failed, leaving the pump unable to restart. That was the end of the road. The mission wrapped up after three weeks at sea, a far shorter run than the team had hoped.
“The success criteria would be if we had left with the generator still on the seafloor; that would have been an example of sustained net power, and we didn’t get there,” Redd told me. Instead, the team brought the system back to Endurance’s Seattle headquarters, where it’s fixing the software as well as refurbishing and upgrading the hardware — which includes changing how it builds and tests subsea cables — to prepare for another mission sometime this winter. This time, the goal will be to generate sustained power from a much deeper well.
The team will need to demonstrate progress soon to keep its next major milestone on track: a planned 2-megawatt deployment off the coast of Tonga by the end of 2027. The project aims to supply electricity directly to the Tongan grid, which today is heavily dependent on expensive, imported diesel. Redd expects subsea geothermal to be cost-competitive with that fuel in this first pilot.
Getting there, however, is a formidable engineering challenge. While it’s long been a subject of academic curiosity, no one prior to Endurance had ever drilled an offshore geothermal well before, meaning the team can’t simply transplant existing land-based technology to the seafloor. “Every component that you would use terrestrially now needs to be either modified or built completely from scratch,” Redd explained. “And so you multiply that across every component required to make these kinds of infrastructure projects happen, and it’s a lot of work.”
No kidding. But if Endurance can pull it off, Redd sees this resource as “the perfect energy source for the future.” A conference paper presented by the geoscience company Viridien last year estimates that offshore geothermal resources worldwide could yield about 6 terawatts of recoverable electric power — nearly twice the world’s current continuous electricity output.
“We can access terawatts of power. There’s no fuel. We can site next to extremely large cities around the Pacific. We have no surface presence,” Redd said, ticking off the advantages. Plus, the three necessary ingredients for a high-quality geothermal well — permeable rock, high heat, and water — are widely accessible offshore, he added. Eventually, he expects subsea geothermal to undercut natural gas in Endurance’s target markets: electricity grids, industrial facilities, and data centers across the Pacific Islands, the U.S. West Coast, and Northeast Asia, all of which sit along the undersea volcanic zone known as the “Ring of Fire.”
The way Redd sees it, advances in subsea technology pioneered by the offshore wind, oil, and gas industries have cleared much of the technological path to making underwater geothermal a viable clean energy resource. In his view, what’s been missing is simply the ambition to chase the opportunity in the private market. SpaceX, he said, really proved what’s possible for a scrappy startup to achieve.
“It is quite new at industrial scale for a small company with a bunch of fairly young people to go after something like this,” he told me. “Before SpaceX went to launch a rocket as a private company, no one thought you could get to orbit as a private company. And so that has really seeded this ambition.”
On Greenland’s deepsea mining ban, Indonesia floating nuclear, and a solar boom
Current conditions: Hurricane Trudy has weakened from its peak as a Category 2 storm but still threatens up to 8 inches of rain as it swirls off Baja California • A nor’easter is howling through the Mid-Atlantic this week, hammering the coast with winds of up to 70 miles per hour • A humid overcast has settled over Paris this week as French authorities struggle to regain control after protests over living costs gave way to anarchic riots.
At least 47 major data center projects have been delayed, withdrawn, or blocked so far this year, according to data the regulatory intelligence service RegLayer shared with the Financial Times — and that may be a “conservative estimate.” Just 35% of planned data centers are “credible,” analysts told the newspaper, as more than 1,000 communities across the United States now have restrictions on artificial intelligence infrastructure. The data comes as investors look increasingly jittery about AI following ChatGPT-maker OpenAI’s missing a key revenue metric this year.
Those findings stand in contrast with the numbers from our data service, Heatmap Pro. Based on our research, at least 107 projects faced cancellation so far this year, putting 2026 on track to beat last year, which saw 108 proposals nixed.
Unless you’re living off the grid and away from any social media (if so, I’m jealous), then you can probably surmise that not-in-my-backyard opposition prevails in many such cases against proposed data centers. That makes selling would-be neighbors on the projects critical. New polling by the advocacy group GoodPower found that a binding promise to protect local electricity rates boosts support for the projects upward by as much as 14 points. Such a pledge worked primarily on the 78% of voters who distrust data centers. Another potential winner: Pair a data center with renewables. At least 46% of respondents to the poll said their support would increase if a project were powered by renewables. The survey spoke to 2,610 registered voters last month and oversampled in states with at least 200 data centers completed: Arizona, Georgia, Indiana, Pennsylvania, Texas, and Virginia.
Greenland wants to find ways to exploit its mineral riches in hopes of generating enough income from industries other than fishing and tourism to eventually wean off subsidies from the governments of Denmark and the European Union. Earlier this month, as you may recall, the self-governing Danish island gave a project the green light. But the government in Nuuk doesn’t want miners harvesting metals from the seabed surrounding the Arctic island, which are fertile fishing grounds and could, in theory, lead to mineral production without meaningful infrastructure to create jobs for Greenlandic people. Last week, the Greenlandic Parliament adopted a resolution requiring the government to draft legislation banning deep-sea mining. All members present voted to approve the proposal, according to Sermitsiaq, a leading newspaper in Nuuk. The ban would, if adopted, last until the end of 2029, with the possibility of an extension for two years at a time.
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Long before the race for small modular reactors kicked off, Russia launched a floating nuclear power station and sailed the vessel up to the Arctic to power a small town. Now, as you may recall, the state-owned Russian nuclear company Rosatom is making plans to build more floating nuclear plants, and it has a major nuclear newcomer nation as an offtaker. Last week, NucNet reported, Rosatom announced a deal with Indonesia’s state-owned PT Pembangkit Listrik Nuklir to supply electricity to northern Indonesia from at least two floating nuclear plants with a capacity of 200 megawatts each.

Over the past decade, small-scale and rooftop solar systems increased from 18,812 gigawatt-hours to 92,979 gigawatt-hours, an increase of over 394%. That’s according to a new analysis from the Energy Information Administration, which found that California, Arizona, Texas, Florida are the regions with the most abundant solar resources. Even though the state has worse solar resources in general, New York ranked fifth as a result of growing capacity. Still, the rate of growth in generation has slowed over the past three years. l
The Trump administration is pulling out all the stops for Alaskans who want to drill and transport fossil fuels, mine minerals, and log trees. Now he’s easing rules on hunters. A new final rule from the National Park Service has revived a hunting method the Biden administration banned in 2024: Baiting bears with doughnuts soaked in bacon grease. Hunters use the baits to lure bears to close range before shooting them. “Some hunters prefer to use strong-smelling, high-calorie foods like pastries, doughnuts, meat scraps or fish remains to lure bears from miles away,” The New York Times reported. “But some conservationists say the practice is unethical and risks making the bears accustomed to human food, which could endanger people.”