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President Biden’s climate law gets a political stress test.

For the first time since it passed last summer, the Inflation Reduction Act — President Biden’s flagship climate law — is facing a threat of repeal.
The Republican majority in the House of Representatives has proposed essentially rolling back the law in their opening bid on negotiations with the White House to extend the government's borrowing limit and prevent a calamitous default. The GOP's proposal, called the Limit, Grow, and Save Act, would raise the debt ceiling for a year while slashing trillions in federal spending over the next decade.
While the Republican bill proposes deep cuts across the board, it takes a cleaver to Biden’s climate policy. Folding in the Lower Energy Costs Act, the first bill that the new GOP majority put on the floor, the act would repeal more than two dozen of the IRA’s clean-energy tax credits, including subsidies for renewables and electric vehicles. It would also defund programs meant to open new factories in the United States and gut climate-friendly programs popular with Republicans, such as generous subsidies for nuclear energy and hydrogen production.
Now, let’s get this out of the way: Neither the bill nor the negotiations around it are likely to repeal the IRA. Yet for the next few days or weeks, the IRA will likely appear to be in danger as nobody will quite say it’s safe out loud.
The Republican bill’s chief importance is as a piece of political posturing: Speaker of the House Kevin McCarthy hopes to demonstrate that he has 218 votes to raise the debt ceiling and pass a budget, any budget, through his disorganized and dramatic caucus. Then he can open more serious negotiations with President Biden and Senate leaders about the debt ceiling and the year’s budget.
But to get there, he’ll have to keep the GOP’s right flank on his side first. McCarthy and House Republican leadership didn’t even want to include the IRA repeal in the Limit, Save, and Grow Act, but included it because the far-right House Freedom Caucus demanded it. That means House leadership must look completely serious about its intent to repeal.
At the same time, climate advocates must now mobilize around the IRA to demonstrate its importance to the public and prevent the Biden administration from sacrificing it in negotiations.
More broadly, though, this moment is a test for a few competing hypotheses about whether the IRA can survive — and about the future of climate policy in America.
To the set of political scientists, climate activists, and energy experts who championed the law, repealing the IRA would be so damaging to Republicans as to be unthinkable. That’s because Republicans’ constituents are, for now, reaping much of the IRA’s economic rewards. Up to two-thirds of green-energy investment nationwide is happening in GOP congressional districts, according to Politico. The all-important swing state of Georgia leads the country in clean-energy and electric-vehicle investments, forming the heartland of a new, vaguely banana-shaped “Battery Belt” that stretches across the largely Republican Southeast. Even beyond that region, Speaker McCarthy’s California district is one of the top two districts nationwide for utility-scale solar, wind, and battery plants.
This wasn’t an accident. The IRA is a product of the Democratic Party, so it was, yes, meant to do all those old-school Democrat things — encourage unionization, boost wages, and help revitalize the old industrial Midwest. But it was written by Democrats who see the party’s future in the Sunbelt suburbs and who prioritize decarbonization above other political goals. They knew — they couldn’t help but know — that much of the law’s investment would flow to the manufacturing centers of the American South and Southwest, where “Right to Work” laws restrict worker power and corporate-friendly policies reign.
On the other side, a set of critics allege that Republicans’ attack on the IRA doesn’t need to make political sense. Kate Aronoff, a New Republic staff writer who has been guardedly skeptical of the law, argued last week that House Republicans don’t care about the political fallout of killing the IRA because they’re protected from virtually any type of political fallout at all, thanks to gerrymandering, their deep-pocketed corporate donors, and a sharply conservative Supreme Court. In that view, the attempts to secure the IRA by appealing to Republicans’ constituents is futile: The party will simply do what it wants.
At stake here is a deep but important disagreement about the IRA. The flagship law aims to cleave fossil-fuel interests from the rest of the corporate bolus: to make it so attractive for banks, carmakers, electric utilities, steelmakers, manufacturers, and everyone else to decarbonize that they had no choice but to do so.Can that happen? Will that happen? This is the question on which the IRA’s advocates and its climate-friendly critics disagree. It is also is the question on which the fate of the IRA — and American climate policy — turns.
In her piece, Aronoff notes that fossil-fuel companies donated 13 times more to politicians in 2018 than renewable companies did. I found that to be oddly encouraging: If money alone is the issue, then the fossil-fuel industry’s alleged grip on the GOP could loosen over time. (The gap is already narrowing: Oil and gas-affiliated groups gave about six times more than renewables groups did in the most recent election cycle.)
The far more dangerous possibility for the IRA is that Republicans cannot be won over with money or argument. The party may just vibe with fossil fuels. Lawmakers and officials might feel an ideological affinity for oil and gas that goes deeper than those fuels’ economic or security benefits. During President Donald Trump’s term, he sometimes seemed to speak about fossil fuels not as a necessary evil, but as a positive good. This sometimes verged on trolling, but that was the point too: for Trump, at least, that it triggered liberals only underscored its correctitude. If that view were to break out into the party at large, it would spell an end to any kind of bipartisan shift on climate policy.
Which is all to say: Republicans probably won’t repeal the IRA this week.
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On AI forecasts, California bills, and Trump’s fusion push
Current conditions: The intense rain pummeling Southern California since the start of the new year has subsided, but not before boosting Los Angeles’ total rainfall for the wet season that started in October a whopping 343% above the historical average • The polar vortex freezing the Great Lakes and Northeast is moving northward, allowing temperatures in Chicago to rise nearly 20 degrees Fahrenheit • The heat wave in southern Australia is set to send temperatures soaring above 113 degrees.

It’s not the kind of thing anyone a decade ago would have imagined: a communique signed by most of Western Europe’s preeminent powers condemning Washington’s efforts to seize territory from a fellow NATO ally. But in the days since the United States launched a surprise raid on Venezuela and arrested its long-time leader Nicolás Maduro, President Donald Trump has stepped up his public lobbying of Denmark to cede sovereignty over Greenland to the U.S. Senator Thom Tillis, the North Carolina Republican, and Senator Jeanne Shaheen, the Democrat from New Hampshire, put out a rare bipartisan statement criticizing the White House’s pressure campaign on Denmark, “one of our oldest and most reliable allies.” While Stephen Miller, Trump’s hard-line deputy chief of staff, declined to rule out an invasion of Greenland during a TV appearance this week, The Wall Street Journal reported Tuesday that Secretary of State Marco Rubio told lawmakers that the goal of the administration’s recent threats against the autonomously-governed Arctic island were to press Denmark into a sale.
The U.S. unsuccessfully tried acquiring Greenland multiple times during the 20th century, and invaded the island during World War II to prevent the Nazis from gaining a North American foothold after Denmark fell in the blitzkrieg. Indeed, Washington purchased the U.S. Virgin Islands, its second largest Caribbean territory, shortly after the 1898 Spanish-American war that brought Puerto Rico under American control. But the national-security logic of taking Greenland now, when the U.S. already maintains a military base there, is difficult to parse. “Greenland already is in the U.S. sphere of influence,” Columbia University political scientist Elizabeth N. Saunders wrote in a post on Bluesky. “It’s far cheaper for the U.S., in material, security, and reputational terms, to have Denmark continue administering Greenland and work within NATO on security.” One potential reason Trump might want the territory, as Heatmap’s Jael Holzman wrote last fall, is to access Greenland’s mineral wealth. But the logistics of getting rare earths out of both the ground and the Arctic to refineries in the U.S. are challenging. Meanwhile, in other imperialistic activities, Trump said Tuesday evening in a post on Truth Social that Venezuela would cede between 30 million and 50 million barrels of oil to the U.S., though the legal mechanism for such a transfer remains murky, according to The New York Times.
I told you last month about the in-house market monitor at the PJM Interconnection, the country’s largest power grid, urging federal regulators to prevent more data centers coming online within its territory until it can sort out how to reliably supply them with electricity. As Heatmap’s Matthew Zeitlin wrote days later, “everyone wants to know PJM’s data center plan.” On Tuesday, E&E News reported that PJM is expected to ratchet down its forecasts for how much power demand artificial intelligence will add on the East Coast. When the grid operator’s latest analysis of future needs comes out later this month, PJM Chief Operating Officer Stu Bresler said during a call last month that the projections for mid-2027 will be “appreciably lower” than the current forecast.
The merger of the parent company of Trump’s TruthSocial website and the nuclear fusion developer TAE Technologies, as I reported in this newsletter last month, is “flabbergasting” to analysts. And yet the pair’s partnership is advancing. On Tuesday, the companies announced that site selection was underway for a pilot-scale power plant set to begin construction later this year. The first facility would generate just 50 megawatts of electricity. But the companies said future plants are expected to pump out as much as 500 megawatts of power.
Meanwhile, the rival startup widely seen as the frontrunner to build America’s first fusion plant unveiled new deals of its own. Over at the CES 2026 electronics show in Las Vegas on Tuesday, Commonwealth Fusion Systems — which analysts say is taking a more simplified and straightforward pathway to commercializing fusion power than TAE — touted a new deal with microchip giant Nvidia and told the crowd at the conference that it had installed the first magnet at its pilot reactor, TechCrunch reported.
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Scott Wiener, the California state senator making a bid for Representative Nancy Pelosi’s long-held House seat, introduced two new bills he said were designed to ease rising energy costs. The first bill is meant to “get rid of a bunch of that red tape” that makes installing a heat pump expensive and challenging in the state, the Democrat explained in a video posted on Bluesky. The second piece of legislation would clear the way for renters to install small, plug-in solar panels on apartment balconies. “Right now, in California, it is way, way, way too hard, if not impossible, to install these kinds of units,” Wiener said. “We have to make energy more affordable for people.”
Sunrun is forming a new joint venture with the green infrastructure investor HASI to finance deployment of at least 300 megawatts of solar across what the companies billed as “more than 40,000 home power plants across the country.” As part of the deal, which closed last month, HASI will invest $500 million over an 18-month period into the new company, allowing the nation’s largest solar installer to “retain a significant long-term ownership position” in the projects. As I reported for exclusively Heatmap in October, a recent analysis by the nonprofit Permit Power, which advocates for easing red tape on rooftop solar, found that the cost of solar panels in the U.S. was far higher than in Australia or Germany due to bureaucratic rules. The HASI investment will help bring down the costs for Sunrun directly as it installs more panels.
Total U.S. utility-scale solar installations for 2025 were on track last month to beat the previous year, as I reported in this newsletter. But the phaseout of federal tax credits next year is set to dim the industry somewhat as projects race to start construction before the expiration date.
In another session at CES 2026, the electric transportation company Donut Labs claimed it’s made an affordable, energy-dense solid state battery that’s powering a new motorcycle and charges in just five minutes. The startup hasn’t yet produced any independent verification of those promises. But the company is known for what InsideEVs called its “sci-fi wheel-in electric motor” for its bikes.
Deep Fission says that building small reactors underground is both safer and cheaper. Others have their doubts.
In 1981, two years after the accident at Three Mile Island sent fears over the potential risks of atomic energy skyrocketing, Westinghouse looked into what it would take to build a reactor 2,100 feet underground, insulating its radioactive material in an envelope of dirt. The United States’ leading reactor developer wasn’t responsible for the plant that partially melted down in Pennsylvania, but the company was grappling with new regulations that came as a result of the incident. The concept went nowhere.
More than a decade later, the esteemed nuclear physicist Edward Teller resurfaced the idea in a 1995 paper that once again attracted little actual interest from the industry — that is, until 2006, when Lowell Wood, a physicist at the Lawrence Livermore National Laboratory, proposed building an underground reactor to Bill Gates, who considered but ultimately abandoned the design at his nuclear startup, TerraPower.
Now, at last, one company is working to make buried reactors a reality.
Deep Fission proposes digging boreholes 30 inches in diameter and about a mile deep to house each of its 15-megawatt reactors. And it’s making progress. In August, the Department of Energy selected Deep Fission as one of the 10 companies enrolled in the agency’s new reactor pilot program, meant to help next-generation startups split their first atoms by July. In September, the company announced a $30 million reverse merger deal with a blank check firm to make its stock market debut on the lesser-known exchange OTCQB. Last month, Deep Fission chose an industrial park in a rural stretch of southeastern Kansas as the site of its first power plant.
Based in Berkeley, California, the one-time hub of the West Coast’s fading anti-nuclear movement, the company says its design is meant to save money on above-ground infrastructure by letting geology do the work to add “layers of natural containment” to “enhance safety.” By eliminating much of that expensive concrete and steel dome that encases the reactor on the surface, the startup estimates “that our approach removes up to 80% of the construction cost, one of the biggest barriers for nuclear, and enables operation within six months of breaking ground.”
“The primary benefit of placing a reactor a mile deep is cost and speed,” Chloe Frader, Deep Fission’s vice president of strategic affairs, told me. “By using the natural pressure and containment of the Earth, we eliminate the need for the massive, above-ground structures that make traditional nuclear expensive and slow to build.”
“Nuclear power is already the safest energy source in the world. Period,” she said. “Our underground design doesn’t exist because nuclear is unsafe, it exists because we can make something that is already extremely safe even safer, simpler, and more affordable.”
But gaining government recognition, going public, and picking a location for a first power plant may prove the easy part. Convincing others in the industry that its concept is a radical plan to cut construction costs rather than allay the public’s often-outsize fear of a meltdown has turned out to be difficult, to say nothing of what actually building its reactors will entail.
Despite the company’s recent progress, I struggled to find anyone who didn’t have a financial stake in Deep Fission willing to make the case for its buried reactors.
Deep Fission is “solving a problem that doesn't actually exist,” Seth Grae, the chief executive of the nuclear fuel company Lightbridge, told me. In the nearly seven decades since fission started producing commercial electrons on the U.S. grid, no confirmed death has ever come from radiation at a nuclear power station.
“You’re trying to solve a political problem that has literally never hurt anyone in the entire history of our country since this industry started,” he said. “You’re also making your reactors more expensive. In nuclear, as in a lot of other projects, when you build tall or dig deep or lift big and heavy, those steps make the projects much more expensive.”
Frader told me that subterranean rock structures would serve “as natural containment, which also enhances safety.” That’s true to some extent. Making use of existing formations “could simplify surface infrastructure and streamline construction,” Leslie Dewan, a nuclear engineer who previously led a next-generation small modular reactor startup, told IEEE Spectrum.
If everything pans out, that could justify Deep Fission’s estimate that its levelized cost of electricity — not the most dependable metric, but one frequently used by solar and wind advocates — would be between $50 and $70 per megawatt-hour, lower than other SMR developers’ projections. But that’s only if a lot of things go right.
“A design that relies on the surrounding geology for safety and containment needs to demonstrate a deep understanding of subsurface behavior, including the stability of the rock formations, groundwater movement, heat transfer, and long-term site stability,” Dewan said. “There are also operational considerations around monitoring, access, and decommissioning. But none of these are necessarily showstoppers: They’re all areas that can be addressed through rigorous engineering and thoughtful planning.”
As anyone in the geothermal industry can tell you, digging a borehole costs a lot of money. Drilling equipment comes at a high price. Underground geology complicates a route going down one mile straight. And not every hole that’s started ends up panning out, meaning the process must be repeated over and over again.
For Deep Fission, drilling lots of holes is part of the process. Given the size of its reactor, to reach a gigawatt — the output of one of Westinghouse’s flagship AP1000s, the only new type of commercial reactor successfully built from scratch in the U.S. this century — Deep Fission would need to build 67 of its own microreactors. That’s a lot of digging, considering that the diameters of the company’s boreholes are on average nearly three times wider than those drilled for harvesting natural gas or geothermal.
The company isn’t just distinguished by its unique approach. Deep Fission has a sister company, Deep Isolation, that proposes burying spent nuclear fuel in boreholes. In April, the two startups officially partnered in a deal that “enables Deep Fission to offer an end-to-end solution that includes both energy generation and long-term waste management.”
In theory, that combination could offer the company a greater social license among environmental skeptics who take issue with the waste generated from a nuclear plant.
In 1982, Congress passed a landmark law making the federal government responsible for the disposal of all spent fuel and high-level radioactive waste in the country. The plan centered on building a giant repository to permanently entomb the material where it could remain undisturbed for thousands of years. The law designated Yucca Mountain, a rural site in southwestern Nevada near the California border, as the exclusive location for the debut repository.
Construction took years to start. After initial work got underway during the Bush administration, Obama took office and promptly slashed all funding for the effort, which was opposed by then-Senate Majority Leader Harry Reid of Nevada; the nonpartisan Government Accountability Office clocked the move as a purely political decision. Regardless of the motivation, the cancellation threw the U.S. waste disposal strategy into limbo because the law requires the federal government to complete Yucca Mountain before moving on to other potential storage sites. Until that law changes, the U.S. effort to find a permanent solution to nuclear waste remains in limbo, with virtually all the spent fuel accumulated over the years kept in intermediate storage vessels on site at power plants.
Finland finished work on the world’s first such repository in 2024. Sweden and Canada are considering similar facilities. But in the U.S., the industry is moving beyond seeing its spent fuel as waste, as more companies look to start up a recycling industry akin to those in Russia, Japan, and France to reprocess old uranium into new pellets for new reactors. President Donald Trump has backed the effort. The energy still stored in nuclear waste just in this country is sufficient to power the U.S. for more than a century.
Even if Americans want an answer to the nuclear waste problem, there isn’t much evidence to suggest they want to see the material stored near their homes. New Mexico, for example, passed a law barring construction of an intermediate storage site in 2023. Texas attempted to do the same, but the Supreme Court found the state’s legislation to be in violation of the federal jurisdiction over waste.
While Deep Fission’s reactors would be “so far removed from the biosphere” that the company seems to think the NRC will just “hand out licenses and the public won’t worry,” said Nick Touran, a veteran engineer whose consultancy, What Is Nuclear, catalogs reactor designs and documents from the industry’s history, “the assumption that it’ll be easy and cheap to site and license this kind of facility is going to be found to be mistaken,” he told me.
The problem with nuclear power isn’t the technology, Brett Rampal, a nuclear expert at the consultancy Veriten, told me. “Nuclear has not been suffering from a technological issue. The technology works great. People do amazing things with it, from curing cancer to all kinds of almost magical energy production,” he told me. “What we need is business models and deployment models.”
Digging a 30-inch borehole a mile deep would be expensive enough, but Rampal also pointed out that lining those shafts with nuclear-grade steel and equipping them with cables would likely pencil out to a higher price than building an AP1000 — but with one one-hundredth of the power output.
Deep Fission insists that isn’t the case, and that the natural geology “removes the need for complex, costly pressure vessels and large engineered structures” on the surface.
“We still use steel and engineered components where necessary, but the total material requirements are a fraction of those used in a traditional large-scale plant,” Frader said.
Ultimately, burying reactors is about quieting concerns that should be debunked head on, Emmet Penney, a historian of the industry and a senior fellow at the Foundation for American Innovation, a right-leaning think tank that advocates building more reactors in the U.S., told me.
“Investors need to wake up and realize that nuclear is one of the safest power sources on the planet,” Penney said. “Otherwise, goofy companies will continue to snow them with slick slide decks about solving non-issues.”
On energy efficiency rules, Chinese nuclear, and Japan’s first offshore wind
Current conditions: Warm air headed northward up the East Coast is set to collide with cold air headed southward over the Great Lakes and Northeast, bringing snowfall followed by higher temperatures later in the week • A cold front is stirring up a dense fog in northwest India • Unusually frigid Arctic air in Europe is causing temperatures across northwest Africa to plunge to double-digit degrees below seasonal norms, with Algiers at just over 50 degrees Fahrenheit this week.

Oil prices largely fell throughout 2025, capping off December at their lowest level all year. Spot market prices for Brent crude, the leading global benchmark for oil, dropped to $63 per barrel last month. The reason, according to the latest analysis of the full year by the Energy Information Administration, is oversupply in the market. China’s push to fill its storage tanks kept prices from declining further. Israel’s June 13 strikes on Iran and attacks on oil infrastructure between Russia and Ukraine briefly raised prices throughout the year. But the year-end average price still came in at $69 per barrel, the lowest since 2020, even when adjusted for inflation.

The price drop bodes poorly for reviving Venezuela’s oil industry in the wake of the U.S. raid on Caracas and arrest of the South American country’s President Nicolás Maduro. At such low levels, investments in new infrastructure are difficult to justify. “This is a moment where there’s oversupply,” oil analyst Rory Johnston told my colleague Matthew Zeitlin yesterday. “Prices are down. It’s not the moment that you’re like, I’m going to go on a lark and invest in Venezuela.”
The Energy Department granted a Texas company known for recycling defunct tools from oil and gas drilling an $11.5 million grant to fund an expansion of its existing facility in a rural county between San Antonio and Dallas. The company, Amermin, said the funding will allow it to increase its output of tungsten carbide by 300%, “reducing our reliance on foreign nations like China, which produces 83%” of the world’s supply of the metal used in all kinds of defense, energy, and hardware applications. “Our country cannot afford to rely on our adversaries for the resources that power our energy industry,” Representative August Pfluger, a Texas Republican, said in a statement. “This investment strengthens our district’s role in American energy leadership while providing good paying jobs to Texas families.”
That wasn’t the agency’s only big funding announcement. The Energy Department gave out $2.7 billion in contracts for enriched uranium, with $900 million each to Maryland-based Centrus Energy, the French producer Orano, and the California-headquartered General Matter. “President Trump is catalyzing a resurgence in the nation’s nuclear energy sector to strengthen American security and prosperity,” Secretary of Energy Chris Wright said in a press release. “Today’s awards show that this Administration is committed to restoring a secure domestic nuclear fuel supply chain capable of producing the nuclear fuels needed to power the reactors of today and the advanced reactors of tomorrow.”
Low-income households in the United States pay roughly 30% more for energy per square foot than households who haven’t faced trouble paying for electricity and heat in the past, federal data shows. Part of the problem is that the national efficiency standards for one of the most affordable types of housing in the nation, manufactured homes, haven’t been updated since 1994. Congress finally passed a law in 2007 directing the Department of Energy to raise standards for insulation, and in 2022, the Biden administration proposed new rules to increase insulation and reduce air leaks. But the regulations had yet to take effect when President Donald Trump returned to office last year. Now the House of Representatives is prepared to vote on legislation to nullify the rules outright, preserving the standards set more than three decades ago. The House Committee on Rules is set to vote on advancing the bill as early as Tuesday night, with a full floor vote likely later in the week. “You’re just locking in higher bills for years to come if you give manufacturers this green light to build the homes with minimal insulation,” Mark Kresowik, senior policy director of the American Council for an Energy-Efficient Economy, told me.
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The newest reactor at the Zhangzhou nuclear station in Fujian Province has officially started up commercial operation as China’s buildout of new atomic power infrastructure picks up pace this year. The 1,136-megawatt Hualong One represents China’s leading indigenous reactor design. Where once Beijing preferred the top U.S. technology for large-scale reactors, the Westinghouse AP1000, the Hualong One’s entirely domestic supply chain and design that borrows from the American standard has made China’s own model the new leader.
In a sign of just how many reactors China is building — at least 35 underway nationwide, as I noted in yesterday’s newsletter — the country started construction on two more the same week the latest Hualong One came online. World Nuclear News reported that first concrete has been poured for a pair of CAP1000 reactors, the official Chinese version of the Westinghouse AP1000, at two separate plants in southern China.
Back in October, when Japan elected Sanae Takaichi as its first female prime minister, I told you about how the arch-conservative leader of the Liberal Democratic Party planned to refocus the country’s energy plans on reviving the nuclear industry. But don’t count out offshore wind. Unlike Europe’s North Sea or the American East Coast, the sharp continental drop in Japan’s ocean makes rooting giant turbines to the sea floor impossible along much of its shoreline. But the Goto Floating Wind Farm — employing floating technology under consideration on the U.S. West Coast, too — announced the start of commercial operations this week, pumping nearly 17 megawatts of power onto the Japanese grid. Japanese officials last year raised the country’s goal for installed capacity of offshore wind to 10 gigawatts by 2030 and 45 gigawatts by 2040, Power magazine noted, so the industry still has a long way to go.
Beavers may be the trick to heal nature’s burn scars after a wildfire. A team of scientists at the U.S. Forest Service and Colorado State University are building fake beaver dams in scorched areas to study how wetlands created by the dams impact the restoration of the ecosystem and water quality after a blaze. “It’s kind of a brave new world for us with this type of work,” Tim Fegel, a doctoral candidate at Colorado State, who led the research, said in a press release.