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Getting a commercial reactor online by the 2030s doesn’t sound as crazy as it used to.
There’s a reason they call a seemingly impossible technological reach a “moonshot.” Over the years, the term has been used to refer to virtual reality, self-driving cars, and biometric identification such as DNA fingerprinting. Now, it’s fusion’s turn.
“Where we are on fusion is kind of where we were on getting to the moon when Kennedy gave his speech,” Phil Larochelle, a founding partner at Breakthrough Energy Ventures who leads its fusion investment strategy, told me, referencing John F. Kennedy’s 1962 speech about putting a man on the moon by 1970. “Did they have any idea how they were going to make a guidance computer that was actually going to get on the moon? No. Did they have the rockets that they needed that were strong enough to get to the moon? No. And so it’s kind of like that in fusion.”
There have already been some high-profile milestones over the past few years. Toward the end of 2022, the National Ignition Facility at Lawrence Livermore National Lab beat breakeven, creating a fusion reaction that produced more energy than it took to heat up the fusion plasma. Or when the startup Commonwealth Fusion Systems, a.k.a. CFS, announced that it had developed a new type of extremely powerful magnet to better contain and control superheated plasma. Now, startups and investors think the next decade will be critical for commercialization.
“When we started BEV, we kind of assumed that fusion was going to be too far off,” said Larochelle. But after talking with CFS and learning more about the company’s magnet tech, minds changed. Breakthrough invested in the company — and eventually three other fusion startups, too. “These better magnets matter a lot,” Larochelle told me. “It matters as much as the transistor did to a computer. It’s that level of component level breakthrough that totally changes the game.”
For the ordinary optimist, fusion energy might invoke a cheerful Jetsons-style future of flying cars and interplanetary colonization. For the cynic, it’s a world-changing moment that’s perpetually 30 years away. But investors, nuclear engineers, and physicists see it as a technology edging ever closer to commercialization and a bipartisan pathway towards both energy security and decarbonization.
To some extent at least, the data backs them up. According to the Fusion Industry Association, over 60% of all private fusion companies were founded in 2019 or later. And in the past three years alone, fusion companies have brought in over $5.1 billion, over 70% of the sector’s total funding since 1992.
“We would hope to see a breakeven moment by private companies in the next two to three years, by 2028-ish,” followed by a commercial reactor in the mid-2030s, Julien Barber, an investor at Emerson Collective, told me. Thus far, Emerson, which is headed by Laurene Powell Jobs, has invested in two fusion companies, CFS and Xcimer Energy.
The major players in the startup ecosystem say they’re on track to get there. “The progress has actually been faster than Moore’s law,” Ally Yost, senior vice president of corporate development at CFS, told me, “but people weren't looking at that.”
Moore’s law is a prediction — largely validated for decades — that the number of transistors on a microchip, and thus a computer’s processing speed, would generally double every two years. The performance of fusion reactors, especially the donut-shaped tokamak reactors that CFS uses, has historically improved at an even faster rate. But due to some midcentury researchers and technology enthusiasts overpromising on the near-term feasibility of fusion, cynicism remains. It also doesn’t help that the large, intergovernmental fusion megaproject known as ITER has consistently faced delays and huge cost overruns due to the technical complexity of the project, as well as the difficulty of wrangling 35 countries to work together.
Thus far, though, the private sector is faring better. CFS has raised over $2 billion, more than any other private company in the space. It uses an approach known as magnetic confinement fusion, which involves using strong magnets to confine fusion fuel in the form of a plasma. If you can keep the plasma dense enough and hot enough for long enough, atoms start fusing together, releasing a vast amount of energy in the process. ITER, as well as startups including Type One Energy, Thea Energy, and Renaissance Fusion are pursuing the same fundamental route, though with their own technical twists.
Lawrence Livermore, on the other hand, achieved its breakthrough fusion reaction (which it’s since repeated several times) using an approach known as inertial confinement, in which powerful lasers fire at a pellet of fusion fuel, causing rapid compression and heating that leads to nuclear fusion. But the national lab is not aiming to create a commercial reactor. So when the founders of the startup Xcimer Energy saw that the National Ignition Facility was closing in on its goal, they jumped to get inertial confinement tech ready for market.
“In August of 2021, NIF achieved a fusion gain of about 0.6,” Xcimer’s President and CTO, Alexander Valys, told me, referring to the ratio of the energy generated by the fusion reaction to the energy required to heat the fusion plasma. An energy gain of one constitutes breakeven, so the moment didn’t get any mainstream press to speak of. “But inside the field, everyone knew that the previous NIF shot record was effectively a gain of like 0.01,” Valys said. The massive jump indicated to him that, “If we’re going to do this, we have to do it now.” Since then Xcimer has gotten backing from the biggest names in the space, including BEV, Lowercarbon Capital, and Emerson Collective, as it looks to build lasers at lower cost and higher power.
One thing that ties fusion’s various technical approaches together is the fact that they’ve all benefited tremendously from advances in supercomputing, which allows researchers to better model plasma physics and rapidly simulate fusion experiments. “It’s really taken the advent of modern computational methods and supercomputers to be able to model that process with sufficient accuracy, that you can actually develop a machine that recreates those conditions,” Christofer Mowry, CEO of the magnetic confinement startup Type One Energy, told me.
At this point, many leading companies say that the problem is no longer about basic science, but cost. Clea Kolster, head of science at Lowercarbon Capital, told me that once CFS turns on its demonstration reactor, the company knows its fusion gain will be “at least greater than two.” (Lowercarbon is a CFS investor.) That said, there’s still loads of uncertainty around the reactor’s performance, as outside studies project that its energy gain will be more like 11 — although even that might not be enough for it to make economic sense.
So while the economics of fusion are a large part of what venture capitalists are betting on these days, private investment in the industry has actually fallen over the past two years, after peaking in 2022 at $2.8 billion. “A step change in growth will be required once private companies deliver results on their prototype machines,” Andrew Holland, CEO of the Fusion Industry Association, said in a statement, adding that last year’s $900 million in funding “will not be enough to deliver fusion’s ambitious goals.”
To date, government funding has comprised a mere 6% of the industry’s total, but contra the private funding trend, that figure has been ticking up as of late. Last year, the Department of Energy announced $46 million in funding for eight private fusion companies to help the administration reach its goal of demonstrating fusion at pilot scale within a decade.
All the companies I spoke with were awardees, and all agreed that much more would be needed, pointing to the public-private partnership between NASA and SpaceX as a model for how the government could more deeply support commercialization of fusion. That partnership was the product of NASA’s Commercial Orbital Transportation Services program, designed to catalyze the development of private spacecraft and funded to the tune of $800 million.
China, meanwhile, is outspending the U.S. on fusion, just as it’s done with solar, and launched a national fusion consortium at the beginning of this year.
“We are about to harness the sun a second time, and we can’t make that mistake again. We have to get serious about building this industry here in the United States,” Clay Dumas, a partner at Lowercarbon Capital, told me. The firm has a dedicated $250 million fusion fund, and has invested in a total of eight companies in the space, spanning a wide array of technical approaches. “That is going to take the combined efforts of investors and entrepreneurs and policymakers and energy companies and governments to make sure that we can drive this forward on the timeframe that it needs to happen.”
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Kettle offers parametric insurance and says that it can cover just about any home — as long as the owner can afford the premium.
Los Angeles is on fire, and it’s possible that much of the city could burn to the ground. This would be a disaster for California’s already wobbly home insurance market and the residents who rely on it. Kettle Insurance, a fintech startup focused on wildfire insurance for Californians, thinks that it can offer a better solution.
The company, founded in 2020, has thousands of customers across California, and L.A. County is its largest market. These huge fires will, in some sense, “be a good test, not just for the industry, but for the Kettle model,” Brian Espie, the company’s chief underwriting officer, told me. What it’s offering is known as “parametric” insurance and reinsurance (essentially insurance for the insurers themselves.) While traditional insurance claims can take years to fully resolve — as some victims of the devastating 2018 Camp Fire know all too well — Kettle gives policyholders 60 days to submit a notice of loss, after which the company has 15 days to validate the claim and issue payment. There is no deductible.
As Espie explained, Kettle’s AI-powered risk assessment model is able to make more accurate and granular calculations, taking into account forward-looking, climate change-fueled challenges such as out-of-the-norm weather events, which couldn’t be predicted by looking at past weather patterns alone (e.g. wildfires in January, when historically L.A. is wet). Traditionally, California insurers have only been able to rely upon historical datasets to set their premiums, though that rule changed last year and never applied to parametric insurers in the first place.
“We’ve got about 70 different inputs from global satellite data and real estate ground level datasets that are combining to predict wildfire ignition and spread, and then also structural vulnerability,” Espie told me. “In total, we’re pulling from about 130 terabytes of data and then simulating millions of fires — so using technology that, frankly, wouldn’t have been possible 10 or maybe five years ago, because either the data didn’t exist, or it just wasn’t computationally possible to run a model like we are today.”
As of writing, it’s estimated that more than 2,000 structures have burned in Los Angeles. Whenever a fire encroaches on a parcel of Kettle-insured land, the owner immediately qualifies for a payout. Unlike most other parametric insurance plans, which pay a predetermined amount based on metrics such as the water level during a flood or the temperature during a heat wave regardless of damages, Kettle does require policyholders to submit damage estimates. The company told me that’s usually pretty simple: If a house burns, it’s almost certain that the losses will be equivalent to or exceed the policy limit, which can be up to $10 million. While the company can always audit a property to prevent insurance fraud, there are no claims adjusters or other third parties involved, thus expediting the process and eliminating much of the back-and-forth wrangling residents often go through with their insurance companies.
So how can Kettle afford to do all this while other insurers are exiting the California market altogether or pulling back in fire-prone regions? “We like to say that we can put a price on anything with our model,” Espie told me. “But I will say there are parts of the state that our model sees as burning every 10 to 15 years, and premiums may be just practically too expensive for insurance in those areas.” Kettle could also be an option for homeowners whose existing insurance comes with a very high wildfire deductible, Espie explained, as buying Kettle’s no-deductible plan in addition to their regular plan could actually save them money were a fire to occur.
But just because an area has traditionally been considered risky doesn’t mean that Kettle’s premiums will necessarily be exorbitant. The company’s CEO, Isaac Espinoza, told me that Kettle’s advanced modeling allows it to drill down on the risk to specific properties rather than just general regions. “We view ourselves as ensuring the uninsurable,” Espinoza said. “Other insurers just blanket say, we don’t want to touch it. We don’t touch anything in the area. We might say, ’Hey, that’s not too bad.’”
Espie told me that the wildly destructive fires in 2017 and 2018 “gave people a wake up call that maybe some of the traditional catastrophe models out there just weren’t keeping up with science and natural hazards in the face of climate change.” He thinks these latest blazes could represent a similar turning point for the industry. “This provides an opportunity for us to prove out that models built with AI and machine learning like ours can be more predictive of wildfire risk in the changing climate, where we’re getting 100 mile per hour winds in January.”
Everyone knows the story of Mrs. O’Leary’s cow, the one that allegedly knocked over a lantern in 1871 and burned down 2,100 acres of downtown Chicago. While the wildfires raging in Los Angeles County have already far exceeded that legendary bovine’s total attributed damage — at the time of this writing, on Thursday morning, five fires have burned more than 27,000 acres — the losses had centralized, at least initially, in the secluded neighborhoods and idyllic suburbs in the hills above the city.
On Wednesday, that started to change. Evacuation maps have since extended into the gridded streets of downtown Santa Monica and Pasadena, and a new fire has started north of Beverly Hills, moving quickly toward an internationally recognizable street: Hollywood Boulevard. The two biggest fires, Palisades and Eaton, remain 0% contained, and high winds have stymied firefighting efforts, all leading to an exceedingly grim question: Exactly how much of Los Angeles could burn. Could all of it?
“I hate to be doom and gloom, but if those winds kept up … it’s not unfathomable to think that the fires would continue to push into L.A. — into the city,” Riva Duncan, a former wildland firefighter and fire management specialist who now serves as the executive secretary of Grassroots Wildland Firefighters, an advocacy group, told me.
When a fire is burning in the chaparral of the hills, it’s one thing. But once a big fire catches in a neighborhood, it’s a different story. Houses, with their wood frames, gas lines, and cheap modern furniture, might as well be Duraflame. Embers from one burning house then leap to the next and alight in a clogged gutter or on shrubs planted too close to vinyl siding. “That’s what happened with the Great Chicago Fire. When the winds push fires like that, it’s pushing the embers from one house to the others,” Duncan said. “It’s a really horrible situation, but it’s not unfathomable to think about that [happening in L.A.] — but people need to be thinking about that, and I know the firefighters are thinking about that.”
Once flames engulf a block, it will “overpower” the capabilities of firefighters, Arnaud Trouvé, the chair of the Department of Fire Protection Engineering at the University of Maryland, told me in an email. If firefighters can’t gain a foothold, the fire will continue to spread “until a change in driving conditions,” such as the winds weakening to the point that a fire isn’t igniting new fuel or its fuel source running out entirely, when it reaches something like an expansive parking lot or the ocean.
This waiting game sometimes leads to the impression that firefighters are standing around, not doing anything. But “what I know they’re doing is they’re looking ahead to places where maybe there’s a park, or some kind of green space, or a shopping center with big parking lots — they’re looking for those places where they could make a stand,” Duncan told me. If an entire city block is already on fire, “they’re not going to waste precious water there.”
Urban firefighting is a different beast than wildland firefighting, but Duncan noted that Forest Service, CALFIRE, and L.A. County firefighters are used to complex mixed environments. “This is their backyard, and they know how to fight fire there.”
“I can guarantee you, many of them haven’t slept 48 hours,” she went on. “They’re grabbing food where they can; they’re taking 15-minute naps. They’re in this really horrible smoke — there are toxins that come off burning vehicles and burning homes, and wildland firefighters don’t wear breathing apparatus to protect the airways. I know they all have horrible headaches right now and are puking. I remember those days.”
If there’s a sliver of good news, it’s that the biggest fire, Palisades, can’t burn any further to the west, the direction the wind is blowing — there lies the ocean — meaning its spread south into Santa Monica toward Venice and Culver City or Beverly Hills is slower than it would be if the winds shifted. The westward-moving Santa Ana winds, however, could conceivably fan the Eaton fire deeper into eastern Los Angeles if conditions don’t let up soon. “In many open fires, the most important factor is the wind,” Trouvé explained, “and the fire will continue spreading until the wind speed becomes moderate-to-low.”
Though the wind died down a bit on Wednesday night, conditions are expected to deteriorate again Thursday evening, and the red flag warning won’t expire until Friday. And “there are additional winds coming next week,” Kristen Allison, a fire management specialist with the Southern California Geographic Area Coordination Center, told me Wednesday. “It’s going to be a long duration — and we’re not seeing any rain anytime soon.”
Editor’s note: Firefighting crews made “big gains” overnight against the Sunset fire, which threatened famous landmarks like the TLC Chinese Theater and the Dolby Theatre, which will host the Academy Awards in March. Most of the mandatory evacuation notices remaining in Hollywood on Thursday morning were out of precaution, the Los Angeles Times reported. Meanwhile, the Palisades and Eaton fires have burned a combined 27,834 acres, destroyed 2,000 structures, killed at least five people, and remain unchecked as the winds pick up again. This piece was last updated on January 9 at 10:30 a.m. ET.
On greenhouse gases, LA’s fires, and the growing costs of natural disasters
Current conditions: Winter storm Cora is expected to disrupt more than 5,000 U.S. flights • Britain’s grid operator is asking power plants for more electricity as temperatures plummet • Parts of Australia could reach 120 degrees Fahrenheit in the coming days because the monsoon, which usually appears sometime in December, has yet to show up.
The fire emergency in Los Angeles continues this morning, with at least five blazes raging in different parts of the nation’s second most-populated city. The largest, known as the Palisades fire, has charred more than 17,000 acres near Malibu and is now the most destructive fire in the county’s history. The Eaton fire near Altadena and Pasadena has grown to 10,600 acres. Both are 0% contained. Another fire ignited in Hollywood but is reportedly being contained. At least five people have died, more than 2,000 structures have been destroyed or damaged, 130,000 people are under evacuation warnings, and more than 300,000 customers are without power. Wind speeds have come down from the 100 mph gusts reported yesterday, but “high winds and low relative humidity will continue critical fire weather conditions in southern California through Friday,” the National Weather Service said.
Apu Gomes/Getty Images
As the scale of this disaster comes into focus, the finger-pointing has begun. President-elect Donald Trump blamed California Gov. Gavin Newsom, suggesting his wildlife protections have restricted the city’s water access. Many people slammed the city’s mayor for cutting the fire budget. Some suspect power lines are the source of the blazes, implicating major utility companies. And of course, underlying it all, is human-caused climate change, which researchers warn is increasing the frequency and severity of wildfires. “The big culprit we’re suspecting is a warming climate that’s making it easier to burn fuels when conditions are just right,” said University of Colorado fire scientist Jennifer Balch.
America’s greenhouse gas emissions were down in 2024 compared to 2023, but not by much, according to the Rhodium Group’s annual report, released this morning. The preliminary estimates suggest emissions fell by just 0.2% last year. In other words, they were basically flat. That’s good news in the sense that emissions didn’t rise, even as the economy grew by an estimated 2.7%. But it’s also a little worrying given that in 2023, emissions dropped by 3.3%.
Rhodium Group, EPA
The transportation, power, and buildings sectors all saw upticks in emissions last year. But there are some bright spots in the report. Emissions fell across the industrial sector (down 1.8%) and oil and gas sector (down 3.7%). Solar and wind power generation surpassed coal for the first time, and coal production fell by 12% to its lowest level in decades, resulting in fewer industrial methane emissions. Still, “the modest 2024 decline underscores the urgency of accelerating decarbonization in all sectors,” Rhodium’s report concluded. “To meet its Paris Agreement target of a 50-52% reduction in emissions by 2030, the U.S. must sustain an ambitious 7.6% annual drop in emissions from 2025 to 2030, a level the U.S. has not seen outside of a recession in recent memory.”
Insured losses from natural disasters topped $140 billion last year, up significantly from $106 billion in 2023, according to Munich Re, the world’s largest insurer. That makes 2024 the third most expensive year in terms of insured losses since 1980. Weather disasters, and especially major U.S. hurricanes, accounted for a large chunk ($47 billion) of these costs: Hurricanes Helene and Milton were the most devastating natural disasters of 2024. “Climate change is taking the gloves off,” the insurer said. “Hardly any other year has made the consequences of global warming so clear.”
Munich Re
A new study found that a quarter of all the world’s freshwater animals are facing a high risk of extinction due to pollution, farming, and dams. The research, published in the journal Nature, explained that freshwater sources – like rivers, lakes, marshes, and swamps – support over 10% of all known species, including fish, shrimps, and frogs. All these creatures support “essential ecosystem services,” including climate change mitigation and flood control. The report studied some 23,000 animals and found about 24% of the species were at high risk of extinction. The researchers said there “is urgency to act quickly to address threats to prevent further species declines and losses.”
A recent oil and gas lease sale in Alaska’s Arctic National Wildlife Refuge got zero bids, the Interior Department announced yesterday. This was the second sale – mandated by Congress under the 2017 Tax Act – to generate little interest. “The lack of interest from oil companies in development in the Arctic National Wildlife Refuge reflects what we and they have known all along – there are some places too special and sacred to put at risk with oil and gas drilling,” said Acting Deputy Secretary Laura Daniel-Davis. President-elect Donald Trump has promised to open more drilling in the refuge, calling it “the biggest find anywhere in the world, as big as Saudi Arabia.”
“Like it or not, addressing climate change requires the help of the wealthy – not just a small number of megadonors to environmental organizations, but the rich as a class. The more they understand that their money will not insulate them from the effects of a warming planet, the more likely they are to be allies in the climate fight, and vital ones at that.” –Paul Waldman writing for Heatmap