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A firestorm over stoves couldn't stop these states from reining in gas.

One of the biggest climate stories of the year — the first, and perhaps only, to go viral — didn’t so much draw attention to the warming planet as it did to the dangers of using fossil fuels.
During the second week of January, Bloomberg reported that a federal safety agency would “consider a ban on gas stoves amid health fears.” Though the headline was somewhat misleading — the commission was investigating the risks of cooking with gas, but a ban was not immediately forthcoming — the article invited swift backlash.
The next day, the Wall Street Journal editorial board published an op-ed warning readers that “Biden is coming for your gas stove.” Conservative politicians expressed their undying loyalty to the appliance. “If the maniacs in the White House come for my stove, they can pry it from my cold dead hands. COME AND TAKE IT!!,” Ronny Jackson, a Republican congressman from Texas, posted on Twitter. Governor Ron DeSantis of Florida designed aprons bearing an illustration of a gas stove that said “Don’t Tread on Florida.” Democratic Senator Joe Manchin of West Virginia also piled on, tweeting, “I can tell you the last thing that would ever leave my house is the gas stove that we cook on.” House Republicans eventually passed a bill called the Gas Stove Protection and Freedom Act.
Meanwhile, everyday Americans were trying to make sense of the news that their gas stoves could be harming them. Every major media outlet ran stories on the risks of cooking with gas and how to minimize them. “How bad is it actually?,” friends started asking me over drinks.
It’s not good. Burning natural gas releases nitrogen dioxide, a pollutant that contributes to respiratory illnesses like asthma. Concentrations from cooking can often exceed government standards for outdoor air quality. Proper ventilation with a range hood can reduce your exposure. But it won’t do anything about the effects gas has on the climate.
About 13% of U.S. emissions come from the fuels burned in buildings. Stoves may be a small part of that, but officials in some of the most climate-forward cities and states have been grappling with reducing the use of all fossil fuel-burning appliances in buildings for a number of years now. In February, the Building Decarbonization Coalition reported that 98 municipalities and four states — California, Washington, Maryland, and Colorado — had adopted policies promoting a switch to electric appliances. When the gas stove hysteria erupted, one in five Americans was already living under laws that encouraged or required landlords and developers to eschew gas.
A lot has happened in the months since, and not every state is swimming in the same direction on the issue. But in 2023, policymakers took big leaps toward a future without gas in buildings in three key ways:
There’s no blueprint for how to decommission thousands of miles of gas pipelines and retrofit millions of homes with electric appliances in a systematic, let alone equitable way. As a start, policymakers have generally followed the Law of Holes, as in, the first step is to stop digging — or in this case, stop growing demand for gas.
In 2019, the city of Berkeley, California, led the way, passing the first ordinance in the country to prohibit gas hookups in new buildings, and dozens of other cities followed. This year, New York became the first state to enact such a policy. The law requires all new buildings that are smaller than seven stories to be fully electric beginning in 2026, and applies to taller buildings in 2029.
“I think it’s huge that a state is doing it, not only because New York is a big-impact state,” Sarah Fox, an associate law professor at Northern Illinois University School of Law, told CNN at the time. It’s no longer “fringe cities passing these policies,” she said. “This is becoming a mainstream policy that a state like New York is taking on.”
However, this year also saw a continuation of Republican-led states taking the opposite tack. Montana, North Dakota, South Dakota, and Idaho joined a list of 24 states that have passed laws prohibiting municipalities from setting these kinds of restrictions on gas in buildings. By my estimation, using 2022 population data from the U.S. Census Bureau, that means two in five Americans live in states with such preemption laws.
Berkeley’s gas ban was also struck down by a federal appeals court, and the city is now fighting for a rehearing. That decision led to some uncertainty, but no loss of momentum. In Washington, where regulators created a de facto ban on gas in new construction through the building code last year, officials recently amended the code to safeguard it against legal challenges.
Utilities typically spend hundreds of millions of dollars each year maintaining, replacing, and building new pipes — funds they expect to recover from ratepayers over the course of decades.
This year, in a few states with strong emission reduction laws that imply heating will have to be electrified in the next few decades, regulators started to scrutinize these investments more. In Illinois, for example, the Commerce Commission ordered People’s Gas, which serves the Chicago area, to pause its pipe replacement program, rejecting the company’s request to hike rates to fund it.
“This program was deeply flawed,” Abe Scarr, state director of the Public Interest Research Group in Illinois, told me. It was supposed to address the real problem of risky iron pipes, but it had been mismanaged and over-budget for years, he said. At the current rate, the company won’t be done until 2049, “right around the time that a lot of us think we should be stopping to use the gas system.”
The commission ordered an investigation into the program. It also initiated a new “Future of Gas” proceeding for all utilities in the state to determine how to align the sector with Illinois’ clean energy goals. “As the State embarks on a journey toward a 100 percent clean energy economy, the gas system’s operations will not continue to exist in its current form,” said Illinois Commerce Commission Chairman Doug Scott in a press release.
Meanwhile, regulators in Massachusetts were wrapping up their own “Future of Gas” proceeding that had kicked off in 2020. In early December, the state’s Department of Public Utilities issued a final order declaring, among many other things, that it will no longer allow companies to recover costs for gas infrastructure without showing that alternatives, like helping customers electrify, were considered. Regulators also rejected the utilities’ preferred path to reducing emissions — switching to lower-carbon fuels like renewable natural gas and hydrogen — as not yet proven. Unless and until the evidence changes, any money the companies spend investigating these solutions will have to be covered by shareholders, not ratepayers.
Also this year, Massachusetts began testing one potentially more systematic pathway to transition off gas. Eversource, a utility there, broke ground on a first-of-its-kind project to switch an entire neighborhood to “networked geothermal,” a form of electric heating that draws on the steady temperature of the ground beneath the earth’s surface to heat and cool buildings.
In many states, it’s standard practice for utilities to bake the cost of political activities like lobbying, advertising, and trade association memberships into customers’ gas and electric rates. These activities often amount to efforts to slow down the clean energy transition — for example, an investigation published this year found that the American Gas Association has fought to stifle warnings about the risks of gas stoves for decades.
“[Utilities] are conscripting their customers into an unknowing army of millions of small-dollar donors to prolong the era of dirty energy,” David Pomerantz, executive director of the nonprofit Energy and Policy Institute, wrote in The New York Times earlier this year.
But now Maine, Colorado, and Connecticut, have all outlawed the practice; if utilities in those states want to spend money on lobbying or trade groups, they’ll have to pay for it out of their own profits. Massachusetts regulators took a similar step, banning gas companies from charging customers for any marketing related to the promotion of natural gas.
I asked Mike Henchen, a principal at the clean energy think tank RMI who follows gas utility regulation around the country, what the next wave of action on the issue might look like.
He said he expects progress to continue next year, with states rolling out rebates for heat pumps with money from the Inflation Reduction Act. Some, like New Jersey and Maryland may follow the playbooks written by first movers like New York and Massachusetts, and those leading states could continue to break new ground. One of the next fronts, he said, is removing the gas industry’s “obligation to serve,” a rule written into most state laws that gives customers the right to demand gas service. That means that even if there’s a strong economic argument to electrify a city block rather than replace a risky pipeline, one resident’s refusal could sink the whole project.
On the bright side, some utilities are starting to talk more openly about needing to reduce the amount of natural gas they sell to customers, Henchen told me. But midway through sharing this thought, he stopped to laugh. “I laugh, because it seems like it should be more obvious that that is the case.”
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The spinoff of Lawrence Livermore National Lab has a new 10-point plan to get onto the grid by the 2030s.
One of fusion energy’s newest startups, Inertia Enterprises, is betting that the fastest route to commercial fusion runs through one of the field’s oldest ideas. The company, which raised a $450 million Series A earlier this year, plans to build a power plant based on the laser-driven fusion system pioneered at Lawrence Livermore National Laboratory’s — the only tech yet to have produced more energy from a fusion reaction than it took to initiate it. Now, Inertia has shared its commercialization roadmap exclusively with Heatmap, detailing the 10 near-term capabilities it must demonstrate before this landmark experiment can become a grid-scale power plant by the mid-2030s.
The roadmap offers a route from the national lab’s impressive but commercially impractical fusion demonstrations to an economical power plant capable of producing electricity for the grid. At its core are a set of milestones — mostly aimed at developing cheap, mass-manufacturable components — that Inertia says it must clear before those individual systems can be integrated into a working plant. This road is not necessarily linear, however, as various teams will likely be working on many of these goals simultaneously.
At least the physics of Inertia’s approach are already proven, the startup’s CEO Jeff Lawson told me, pointing to the fusion experiments at Lawrence Livermore’s National Ignition Facility as a proof-of-concept. The lab’s demonstration of net energy gain caps more than six decades and $30 billion (in 2026 dollars) of U.S. fusion research. The remaining challenges, he argued, are all engineering-related, requiring “elbow grease, hard work, and smart people” rather than breakthroughs in fusion science.
"It seems to us like a startup or a commercial company of any variety should be focused on commercializing a proven scientific result, as opposed to actually trying to demonstrate the basic science to begin with," Lawson told me. Basic science, he argues, is better left to national labs and universities, where researchers can pursue "unbounded problems" that don’t align with the expectations and timelines of venture-backed startups.
Indeed, no fusion startup has yet achieved scientific breakeven, the milestone Lawrence Livermore first hit in 2022, and has since repeated numerous times. But leading players such as Commonwealth Fusion Systems and Helion Energy maintain that it’s only a matter of time before they validate the physics behind their own reactor designs, which they claim will be highly cost-competitive.
Lawson, on the other hand, readily acknowledged that Lawrence Livermore’s tech is uneconomical in its current form. His bet is simply that the more predictable path to a commercial reactor is to drive down the cost of the lab’s validated fusion approach, known as inertial confinement. This system relies on high-powered lasers firing at a millimeter-scale pellet of fusion fuel, compressing it to extreme temperatures and pressures until the atoms fuse. Today, the National Ignition Facility makes each individual fusion target by hand, a workable solution given that it only uses about a dozen per year.
That production model, however, isn’t remotely plausible for a grid-scale power plant. Because each fusion reaction lasts just a fraction of a billionth of a second, a commercial facility must fire its lasers at a fresh target about 10 times per second to generate continuous electricity — requiring the production of hundreds of millions of targets each year.
Scaling production to roughly a million pellets per day and making them inexpensive enough for commercial operation without compromising the strength or precision required for fusion ignition is central to Inertia’s roadmap. That includes goals five, seven, eight and nine — industrializing the manufacturing of the carbon shells that hold the fusion fuel, making the thin films that hold those carbon shells both durable and cheap, scaling up and automating fusion target assembly, and speeding up how fast targets are filled with the requisite deuterium-tritium fuel.
The other central focus of the roadmap is the laser system, which will ultimately consist of 1,000 individual units operating in concert to compress and heat the fusion fuel. Key priorities include reducing the system’s cost (goal two), dramatically increasing its firing cadence (goal three), and bolstering its durability to withstand high-intensity operations (goal four). Goal six also complements these efforts, calling for the development of a control system capable of tracking moving fusion targets to precisely align each laser shot.
Goals one and 10 bookend the journey with some broader milestones. The first focuses on increasing the fusion target’s energy gain — the ratio of fusion energy produced to laser energy delivered — to more than 25 times ignition. Today, the National Ignition Facility’s best-performing laser shot has yielded a gain of just over four times what it took to start the reaction. Goal 10 then zooms out to the ultimate objective: integrating all these technologies into a commercially viable power plant that can deliver either electricity or industrial heat to end customers.
To reach that point, Inertia has embarked on an industrial engineering hiring spree, recruiting folks with experience taking complex hardware systems from prototype to mass production, “not unlike the processes that are used in the semiconductor or consumer electronics world,” Lawson explained. The company has been making progress on its component development goals since the beginning of the year, he told me, and expects to announce the successful demonstration of a few of these milestones in the coming months. Lawson ultimately expects Inertia to complete the core components of its laser and target manufacturing systems by the middle of next year.
The team will spend the next two to three years integrating these individual pieces into two fully operational subsystems, a prototype laser system and a target manufacturing line. Around 2030, the company will begin combining those subsystems into a first-of-a-kind fusion power plant, which will also serve as the proving ground for the target chamber, tritium fuel breeding system, and power conversion system that turns fusion heat into electricity. By the middle of the next decade, Inertia aims to be generating power from this first plant, setting the stage for the company to build and connect additional grid-scale commercial power plants.
There are plenty of engineering trade-offs that the company will have to solve for. Take the decision around how to size the target chamber, for example. “If you make it bigger, your walls have an easier time and survive longer, but it’s more expensive. If you make it smaller, your walls have a tougher time because they’re closer to all the heat and energy that the fusion reaction is creating, but now your power plant costs less to build.”
But to Lawson, this represents exactly the type of problem Inertia was built to solve: complex engineering issues that come to the fore once scientists have demonstrated the fundamental physics are sound. He thinks other fusion companies may someday reach this stage, as well — though he’s unwilling to hazard a guess on exactly what approach or startup is best positioned to do so.
“There have been generations of scientists who’ve made their predictions about fusion energy and gotten it wrong,” he told me. “I’m not going to pretend to be smarter than them. All I’m here to say is, just knowing that one did work, we can commercialize it.”