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On Trump’s polysilicon tariffs, Oklo’s milestone, and black lung

Current conditions: The heat dome in the American Southwest is worsening, with temperatures in Phoenix set to climb as high as 110 degrees Fahrenheit • The wildfires in Greece have killed at least five people as thermometers in Athens near the triple digits • Sri Lanka’s sprawling capital of Colombo is in the midst of a week of intense thunderstorms.
The Department of Defense halted reviews of onshore wind projects in May on national security grounds, a move that my colleague Jael Holzman described at the time as “extrajudicial” and that would ultimately “murder an American industry.” Now the judiciary is getting involved. On Tuesday, U.S. District Judge Karin Immergut, a Trump appointee, indicated that she would likely find in favor of a coalition of renewable energy groups that sued the Trump administration to restart reviews. At the start of a two-hour hearing, Courthouse News Service reported from the federal courthouse in Portland, Oregon, Immergut said there was “strong evidence the government had violated statutory and regulatory deadlines” when the Pentagon stopped carrying out routine reviews needed to progress federal permits for wind turbines to the Federal Aviation Administration.

The Trump administration is preparing to impose new tariffs and minimum import prices on polysilicon in a bid to prop up a domestic supply chain for the primary ingredient in semiconductors and solar panels. The decision, due out after the market closes today, will set a tariff of at least 15% on imported polysilicon and set baseline prices for each component in the supply chain, from the raw material derived from purified quartz to solar wafers, cells, and modules, sources familiar with talks told me, confirming broad details first reported by Reuters and Bloomberg. The Department of Commerce plans to delay implementation to allow domestic manufacturers that rely on imported components time to adjust, and provide offsets to companies that make major investments in the U.S. The policy will serve as a key lifeline to solar manufacturers, who lost one of their main incentives to buy made-in-America panels when the investment and production tax credits for solar effectively ended last month. But industry sources told me that the new trade restrictions would likely fall short of incentivizing new manufacturing, and would require more support on the demand side. The dynamic mirrors what my colleague Matthew Zeitlin called the “paradox of Trump’s critical mineral crusade,” whereby the administration pulled out all the stops to boost mining of rare earths and lithium while eliminating the landmark electric vehicle tax credit that ensured a domestic market for those metals.
It’s hardly the only protectionism the Commerce Department is attempting this month. On Thursday, the agency plans to publish a temporary final rule that would block exports of battery scraps and tungsten waste without a special waiver from the Bureau of Industry and Security. Producers of the materials, E&E News reported, would be required to sell in the U.S. for one year. The move comes a week after President Donald Trump signed a memo blocking exports of mineral-rich waste as the White House seeks to shore up supplies of metals for weapons production. Tungsten, as the Bloomberg “Odd Lots” podcast explained nicely in a recent episode, has a very high melting point, making it ideal for artillery and ammunition. While it’s typically in demand in low amounts during peace time, soaring interest is a sign of widening global conflicts.
For retail investors, Oklo emerged as the face of the small modular reactor industry in 2024 after the Silicon Valley nuclear darling debuted on the stock market. But the company hadn’t yet split atoms. Last night, the company’s low-power test reactor in Texas sustained a reaction for the first time. The milestone makes Oklo the fifth company in the Department of Energy’s Reactor Pilot Program to achieve criticality, but the first to do so on private land. Oklo boasted that the company had erected the facility at a previously undeveloped greenfield site in less than a year, demonstrating that “American nuclear deployment timelines can be measured in months rather than years,” the company said in a press release.
The move comes five months after the Nuclear Regulatory Commission, which notoriously rejected Oklo’s first attempt at gaining approval for its power plant reactors, approved the company’s plans to produce medical isotopes from low-powered reactors, as I exclusively reported in this newsletter at the time.
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Two House Democrats formally referred Secretary of Energy Chris Wright to the Department of Justice for potential prosecution, accusing him of lying to Congress when asked whether the agency canceled green grants for partisan reasons. In a letter published Wednesday in The Hill, Representatives Zoe Lofgren of California and Gabe Amo of Rhode Island, alleged that Wright lied when he testified his blocking of billions in climate spending had nothing to do with the money going to states that voted for Democrat Kamala Harris in the 2024 election. In a federal lawsuit related to the same award terminations, Energy Department lawyers admitted that “the inclusion of grants in the October notice tranche was based solely on the political identity of the grant recipient’s state” Wright previously testified that politics had no role in the decisions. “Secretary Wright lied to the Committee with his statements, which sought to prevent us from learning the truth: that the October award terminations were an act of political retaliation,” Lofgren and Amo wrote in the letter, addressed to acting Attorney General Todd Blanche. “In doing so, he violated 18 USC §1001, which bars individuals from making ‘any materially false, fictitious, or fraudulent statement or representation’ to Congress. We have no choice but to refer Secretary Wright to the Department of Justice for potential prosecution in this matter.”
In 1978, the U.S. used millions more tons of coal than today. Yet miners in Appalachia are facing rates of pneumoconiosis — the incurable, fatal disease known as black lung — at exactly the same levels today. That’s the finding of new data published Wednesday in the American Journal of Respiratory and Critical Care Medicine. Miners in Kentucky, Virginia, and West Virginia who had spent at least 25 years working underground had by far the worst rates, with one in three testing positive in X-rays conducted by the National Institute for Occupational Safety and Health, a federal agency. “I’m disgusted,” Scott Laney, a NIOSH research epidemiologist who is the lead author of the research letter, told NPR. “This is not going to get better because of all the disease that’s already in the pipeline. These guys are being treated like disposable widgets, not human beings. … We’re watching them die right before our eyes.”
Your humble correspondent is due for a series of flights this afternoon. I lose little sleep over my personal carbon footprint; I don’t find it a useful metric, and even if I did, I live in New York City, so my family’s life in dense housing and reliance on public transit already places me well below most Americans. But I can’t help but think of it when I’m riding multiple planes in one day. Which makes this new Bloomberg feature so exciting. In Brazil’s Minas Gerais state, more than 200 researchers are working to commercialize jet fuel made from the oil-rich fruit of the macauba palm tree. Across 356,000 acres, the Abu Dhabi-based biofuels producer Acelen Renováveis plans to start processing macauba oil as part of a $3 billion project. The effort is meant to help the push to reduce airlines’ carbon intensity, but — as with biofuels in general — it’s worth considering the climate benefits with healthy doses of skepticism until detailed analyses come out.
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Voltpost announced two new models today designed to mount on walls and ceilings.
Voltpost, the company putting electric vehicle chargers on lampposts, is now expanding to parking garages.
On Wednesday, the company unveiled two new configurations that can attach to the walls and ceilings of parking garages, lots, and other locations without easy access to streetlights or utility poles. Like Voltpost’s signature pole-mounted design, the ceiling- and wall-mounted options avoid the expensive construction work required by freestanding charging infrastructure. In theory at least, that should allow the company to deploy more chargers faster.
“Our mission has always been to decarbonize mobility by democratizing charging access,” Jeff Prosserman, Voltpost’s co-founder and CEO, told me. “And the real value proposition is that, when you can leverage the existing infrastructure, you can significantly reduce the cost, the timeline, and the physical footprint of chargers.”
The second Trump administration hasn’t made things easy. Almost immediately after taking office, Trump officials began slashing Biden-era programs designed to support the EV charging buildout, including the National Electric Vehicle Infrastructure and Charging and Fueling Infrastructure programs. Along with a handful of environmental groups, 17 states sued in May of last year to force the federal government to release NEVI funding and quickly received a preliminary injunction unfreezing the program. A similar group sued in December over the CFI funding, and though that case is still pending, Prosserman told me he expects to see a positive resolution before the end of the year.
Though the death of the EV tax credit has shrunk its addressable market, Voltpost has emerged relatively unscathed. “Honestly, that doesn’t really impact us at all,” Prosserman told Heatmap’s Katie Brigham last year. “At the end of the day, EV adoption will either increase X or Y percent in a given year, but it’s going to continue to increase year over year. We’re past the tipping point, going from early adopters into the mainstream.”
That said, he also told Katie that the company was taking a “more conservative approach” to growth as climate tech investment dried up. Voltpost itself also received several federal grants that are still in limbo. Instead, the company focused on its strategic partnerships with the likes of AT&T and Zipcar, and in July signed an agreement with InCharge Energy to handle installation and maintenance. To date, Voltpost’s funders include RWE Energy Transition Investments, a private equity vehicle within German energy giant RWE, alongside Twynam Funds Management, Exelon Foundation, Good News Ventures, and Climate Capital.
Like its lamppost chargers, Voltpost’s wall- and ceiling-mount kits work with Tesla and non-Tesla vehicles alike, and come with demand management software that responds to electricity time-of-use price signals to enable cheaper charging where and when possible. As for the cost of the kits and how many the company plans to install initially, Prosserman wouldn’t say.
Since deploying its first lamppost chargers in New York in 2024, Voltpost has expanded into California, Massachusetts, and Washington, D.C., among other states. It has more than 100 deployments in the pipeline through the end of this year, and is aiming for 10,000 by 2030. The point, Prosserman told me, is not to stand out in these communities, but rather to fit in.
“It’s not going to be just about greenfield project development if we’re going to decarbonize a planet across all aspects,” Prosserman said. “We’re really looking at building something that’s integrated, that fits in the fabric of the built environment and communities.”
Current conditions: A sleepy Atlantic hurricane season just snapped to attention as two tropical storms started forming near the Caribbean and off Africa’s coast • Southern California is bracing for a week of triple-digit temperatures • The Hawk Fire has forced 42,000 people to evacuate an area near Reno, Nevada.
The Environmental Protection Agency plans to repeal a federal rule requiring states to publicize and solicit comments on applications for air pollution permits for various industrial facilities, including new data centers and power plants that provide the electricity they need. The move, The New York Times cautioned, “could prevent residents from raising concerns about — or even learning about — data centers before permits are approved and construction starts.” Three-quarters of Americans now oppose data centers built near their homes, according to the latest polling from Heatmap Pro. That’s up from less than half last year.
The Trump administration’s effort to curb public input comes as local opposition to data centers reaches an intensity that frequently draws comparisons to a moral panic. In a post on X last week, one commentator compared the backlash to a 2004 newspaper clip in which a pregnant woman photographed smoking a cigarette complains that the sound of jackhammers from construction on her block posed a risk to her unborn child. A video circulating on Facebook this week showed the former mayor of the Upstate New York town of Massena, where census data shows one in four residents lives below the poverty line, pleading with residents to consider the benefits of data centers. “They’re data centers. They’re being built somewhere. Communities are accepting these things,” he said, urging residents holding protest signs to listen with an open mind to experts about how a proposed facility would be built. “I know for a fact we have aging infrastructure. It’s just going to get worse. How do you fix that? We’re losing people left and right in this community. Look at the number of boarded-up houses. Look at the number of businesses that are going out of business … You can’t afford the time it’s going to take to research for three years when these things are being built today.”
As you may recall, the Trump administration last week imposed harsh water cuts on the three states in the Lower Basin of the Colorado River: Arizona, California, and Nevada. This week, Nevada Governor Joe Lombardo, a Republican, announced litigation filed in federal district court challenging the Department of the Interior’s plan, arguing that the cuts unfairly harm downstream states like his. The lawsuit makes Nevada the first of the three states to launch what E&E News called a “legal war” against the policy. Under the Trump administration’s proposed plan, southern Nevada could lose more than 70% of what Lombardo called its “already meager Colorado River allocation,” even though Colorado, Utah, New Mexico, and Wyoming “are not required to contribute a drop.” The governor, who is up for reelection, continued: “This isn’t about political posturing; this is a matter of survival for a community that represents about two-thirds of our state’s citizens and the lion’s share of its economy.”
Between 2010 and 2024, the United States imported about 59 terawatt-hours of electricity per year from Canada, and exported roughly 13 terawatt-hours back north across the border. America’s appetite for Canadian electricity is only likely to increase as our northern neighbors build more nuclear reactors, hydroelectric dams, and offshore turbines in areas such near the Northeast, among (I say, haughtily clearing my throat as a fourth-generation New Yorker) the most densely populated and culturally powerful parts of the entire U.S. Now that’s under threat as Canadian Prime Minister Mark Carney plays hardball with President Donald Trump in floundering trade talks. After summoning home its trade negotiators over the weekend, Ottawa announced retaliatory tariffs against the U.S. on Tuesday, slapping levies of up to 50% on about $20 billion in goods. On Monday, Ontario Premier Doug Ford said his province could cut off electricity and critical mineral exports to the U.S. “We power 1.5 million homes and businesses,” Ford told the Associated Press. “Everything’s on the table. I’ll do whatever it takes.” While the BBC reported that “squeezing the U.S. on energy is not a current countermeasure,” it also said that such a response “hasn’t been ruled out.” In statements to Utility Dive, the grid operators in New York and New England said new tariffs would not affect reliability, though the latter region cautioned that it could face problems during extreme weather events.
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European buyers of liquified natural gas paid $22.83 for a million British thermal units at the start of this week, more than double the price a year ago and the highest since 2023, according to the Financial Times. The surge came as Iran struck an oil tanker trying to cross the Strait of Hormuz, damaging its engine room and halting the ship. Trump said Tuesday that all underwater mines the Iranian military had laid were now cleared from the waterway. Tehran is set to begin talks with neutral Oman on a route for fully reopening the strait, the Oman Observer reported.
The spike in European LNG prices serves as a reminder of the benefits for the U.S. of becoming the world’s top producer of natural gas and exporter of the version that’s super-chilled to a liquid state for more efficient transportation. LNG, as my colleague Matthew Zeitlin wrote in February, “is the ultimate bogeyman” for many progressives and climate activists. But the American industry, transformed by the fracking revolution over the past two decades, had more than enough supply to help Europe stay warm and keep the lights on in 2022, when Russia started throttling the pipelines selling gas to Ukraine’s allies after the start of the war. “The world is going to keep needing natural gas at least until 2050, and likely well beyond that,” John Hebert, a senior policy adviser at the advocacy group Third Way who is pushing for Democrats to embrace LNG, told Matthew. “The focus, in our view, should be much more on how we reduce emissions from the oil and gas value chain and less on actually trying to phase out these fuels entirely.”

When I visited the Netherlands’ lone nuclear power station in 2022, the single-reactor plant, called Borssele, stood alone next to a demolition site dismantling the power station. But soon the country plans to finally expand its atomic power sector. On Tuesday, NucNet reported that the Dutch nuclear energy agency had signed contracts with France’s EDF and the U.S.-based Westinghouse Electric Company for design studies on at least two new reactors. The advancing plans are a sign of how quickly things are changing in the region. At the end of my visit six years ago, I stood atop a high berm — classic Dutch engineering to reclaim the land and keep the floodwaters at bay — at the end of the facility and caught a glimpse at northern Belgium. Back then, Brussels was shutting down its own nuclear fleet. Now, as I reported earlier this year, the country has nationalized its reactors and plans to revive its industry.
Wildfire smoke is nasty stuff. That’s not news to anyone living in the American West, but we in the Northeast learned the hard way just how harmful it is when Canadian smoke poured into our cities this summer and in 2023. But that smoke can have a benefit, at least when rain carries it into soil: It acts as a fertilizer. A new study found that smoke-rain events can deliver large bursts of nitrogen, phosphorus, and potassium as black soot in the air mixes with water droplets. “It’s important to remember that what goes up must come down,” Alexandra Ponette-González, an urban ecologist at the University of Utah and Natural History Museum of Utah and the lead author of the paper, said in a statement. “There’s so much focus on what goes up and how that affects human health. We’re interested in everything that falls out of the atmosphere and lands on ecosystems, and what that means for our environment.”
The singer’s music spanned genre and generating technology — and asked how to live in a world on fire.
This is an edition of Heatmap Daily, an evening review of the day’s news written by our executive editor. Sign up for it here.
Even as state-level Republicans have started talking about the data center boom more skeptically, the Trump administration keeps hugging it.
The Environmental Protection Agency will ditch a federal rule requiring states to publicize air pollution permits for major new industrial sites, including data centers and off-grid power plants, The New York Times reports. Those are some of the permits that we used in our recent reporting to, for instance, make sense of the scale of the coming gargantuan gas buildout. This policy might make sense as realpolitik in a more subdued development environment, but I don’t understand it when trust in any type of project is so low — and when even a majority of Republicans have turned on local data center development.
We badly need insight into the scale of artificial intelligence energy use right now, but this policy could make things even more uncertain. It reveals, too, just how much President Trump has fallen out of touch with the public.
I was planning on writing about a different topic today — and then Dolly Parton died. The country legend was 80 years old. Her nephew announced her death on social media in a sad, sweet, and lovely video.
What can I say? She was among the most admired living Americans. So voluminous and impressive was her legacy that I don’t even have to stretch much to find an energy or climate angle in it. How many other musicians were born in a home without heat or electricity — but would be eulogized upon their death by the public utility from their Tennessee Mountain Home?
Her music spanned genres and generating technologies. Some of our readers may appreciate her trio with Emmylou Harris and Linda Ronstadt of Neil Young’s environmentalist classic “After the Gold Rush”; others, her takes on lighting — or liquid combustion. But most will enjoy the lead single off her final album, where the studiously apolitical singer confronted the prospect of a burning world: “Now I ain’t one for speaking out much / But that don’t mean I don’t stay in touch,” she sang. “Liar, liar the world’s on fire / What we gonna do when it all burns down?”
In a fluke, the next tropical cyclone to form in the Atlantic basic will — according to the World Meteorological Organization’s 2026 list — be named Dolly. Let’s hope it puts on a show but doesn’t find any islands in its stream.