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Most climate solutions are getting smarter. Solar panels can track the sun. Electric vehicles are equipped with the equivalent of an iPad and may soon be able to drive themselves (according to some people). Startups are inventing stoves with batteries that charge when energy is cheap and heat pumps that learn how you use your home and adjust accordingly.
But when it comes to permanently removing carbon dioxide from the atmosphere, the market is pushing in a different direction. There, it seems, there’s growing excitement for the dumbest, most primitive solutions companies can come up with.
The case in point this week is a $58 million agreement between Frontier, a fund started by tech companies to help grow the carbon removal market, and Vaulted Deep, a startup that collects food waste, poop, and other wet, sludgy, organic material and stashes it away underground. It’s the biggest deal Frontier has made to date, followed closely by a $57 million contract it signed in December with Lithos Carbon, which crushes up rocks and sprinkles the dust on agricultural fields. The rock naturally reacts with carbon dioxide in the air to form bicarbonate, which can essentially lock it away permanently.
There are at least 850 startups around the world trying to figure out the most effective, scalable, low-cost approach to cleaning up the legacy carbon pollution that’s warming the planet. Some of the most promising solutions have involved building big, energy-intensive systems that extract tiny amounts of carbon dioxide from the ambient air. One company I recently wrote about is manufacturing millions of tennis ball-sized sponges that will be stacked in trays, absorb carbon from the air, and then transferred into an oven to bake off the carbon.
Is it possible the answer could be as easy as pulverizing rocks and burying waste?
I ran my observation about the growing enthusiasm for dumb ideas past Hannah Bebbington, a strategy lead at Frontier, and she agreed — “totally,” she said, though she preferred the phrase “low-tech.” Compared to some of the earlier stars of carbon removal, Vaulted Deep and Lithos don’t require as much upfront capital investment or years and years of research and development. “At the end of the day, we are really excited about getting to gigaton scale carbon removal, and it doesn’t have to be the sexiest technology.”
So far, it seems, these lower-tech companies have been able to scale quickly. Vaulted Deep, for instance, launched at the end of August last year and has already delivered more than 2,400 tons of carbon removal. By comparison, the only operating direct air capture facility in the United States is capable of removing 1,000 tons of CO2 per year.
Vaulted Deep’s first project is in Kansas, where it is intercepting “woody waste” like grass clippings and tree trimmings that was destined to be incinerated. Once upon a time, when the plants were alive, they sucked up carbon from the atmosphere. If the clipping had been burned, the carbon would have been released back into the air. By slurrifying the waste and injecting it into a deep well, hundreds of feet underground, Vaulted Deep disrupts the cycle, potentially for millennia.
One advantage of this approach is that the carbon capture work is done for free, courtesy of photosynthesis. (Trees, of course, do this too, but not permanently.) Another is that Vaulted Deep uses mature technology to turn the waste into a slurry that can be injected underground. The company was spun out of Advantek, a waste management business that pioneered slurry injection in the 1980s. Most of the substances we inject into the layers of rock underneath our feet are pure liquid or gas, Julia Reichelstein, the CEO of Vaulted Deep told me. Advantek’s technology enables the company to take solid waste and, with minimal processing and energy, get it injection-ready.
The company’s third advantage is being able to pump its waste into “class five” wells, a designation made by the Environmental Protection Agency. Class five is sort of a catch-all category, encompassing shallow wells used for stormwater drainage and septic systems, to deep wells used for geothermal power. Regulations vary by type and by state, but in general, these are much more common and easier to permit than the “class six” wells used for carbon dioxide sequestration. “There’s, you know, 20, 30 years of permit history now on best practices on how you permit a slurry injection well,” Omar Abou-Sayed, the company’s co-founder, told me. “We comply with or exceed all those regulations. So this isn’t a case of, like, move fast and break things.”
All of this allows Vaulted Deep to charge less for carbon removal than many of its peers — closer to $400 per ton, as opposed to upwards of $600. Bebbington, of Frontier, thinks there’s a promising path to bring costs down a lot further if the company can achieve economies of scale by buying the sludgy organic waste in bulk, or move its injection wells closer to where the material originates.
But any climate solution involving biomass raises a host of questions about where the material came from, and what might have been done with it otherwise. Reichelstein said the company’s internal research found that there was almost a billion tons of bio-sludge produced in the U.S. annually. If it could capture all of it, the company estimated, it could sequester more than 300 million tons of carbon away from the atmosphere each year, after taking into account the emissions involved in collecting, processing, and injecting all that waste.
And yet, “The definition of a ‘waste’ is highly contested,” Freya Chay, program lead at the nonprofit CarbonPlan, which analyzes the integrity of different carbon removal approaches, told me.
For example, some companies are eyeing the use of agricultural waste like corn stalks, which are often left to decompose in fields, but also add nutrients to the soil. If the corn waste is removed and processed and buried underground, will that increase the use of carbon-intensive fertilizer? What if the waste was going into a landfill? There, it would have broken down eventually, but much more slowly than if it had been burned.
These questions get more complicated as projects that utilize waste biomass scale up. Once there’s more of a market for the material, will those counterfactuals that support what Vaulted Deep is doing — like that the waste would have been incinerated — still hold? “It's really hard to govern system-level risks with project-level rules, but that is the situation we are in,” said Chay.
At a second project location, in Los Angeles, Vaulted Deep is collecting sewage from the city’s wastewater treatment facilities that otherwise would have been trucked hundreds of miles out of the city and spread on farmland to decompose, releasing CO2 both during the transport and as it decays. The city has actually been paying Advantek to dispose of some of its sewage since 2008. But now, because of the Frontier deal, the company will drop its fee, allowing the city to divert even more of the waste for slurry injection.
Chay didn’t have any immediate concerns about Vaulted Deep’s biomass sourcing. In fact, she highlighted the co-benefits the company would provide. Oftentimes biomass waste is contaminated with toxic chemicals, and Vaulted Deep is preventing it from getting dumped in communities. “We should celebrate that,” she said.
Editor’s note: This story has been updated to correct the type of waste diverted for the Kansas project.
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A new Data for Progress poll provided exclusively to Heatmap shows steep declines in support for the CEO and his business.
Nearly half of likely U.S. voters say that Elon Musk’s behavior has made them less likely to buy or lease a Tesla, a much higher figure than similar polls have found in the past, according to a new Data for Progress poll provided exclusively to Heatmap.
The new poll, which surveyed a national sample of voters over the President’s Day weekend, shows a deteriorating public relations situation for Musk, who has become one of the most powerful individuals in President Donald Trump’s new administration.
Exactly half of likely voters now hold an unfavorable view of Musk, a significant increase since Trump’s election. Democrats and independents are particularly sour on the Tesla CEO, with 81% of Democrats and 51% of independents reporting unfavorable views.
By comparison, 42% of likely voters — and 71% of Republicans — report a favorable opinion of Musk. The billionaire is now eight points underwater with Americans, with 39% of likely voters reporting “very” unfavorable views. Musk is much more unpopular than President Donald Trump, who is only about 1.5 points underwater in FiveThirtyEight’s national polling average.
Perhaps more ominous for Musk is that many Americans seem to be turning away from Tesla, the EV manufacturer he leads. About 45% of likely U.S. voters say that they are less likely to buy or lease a Tesla because of Musk, according to the new poll.
That rejection is concentrated among Democrats and independents, who make up an overwhelming share of EV buyers in America. Two-thirds of Democrats now say that Musk has made them less likely to buy a Tesla, with the vast majority of that group saying they are “much less likely” to do so. Half of independents report that Musk has turned them off Teslas. Some 21% of Democrats and 38% of independents say that Musk hasn’t affected their Tesla buying decision one way or the other.
Republicans, who account for a much smaller share of the EV market, do not seem to be rushing in to fill the gap. More than half of Republicans, or 55%, say that Musk has had no impact on their decision to buy or lease a Tesla. While 23% of Republicans say that Musk has made them more likely to buy a Tesla, roughly the same share — 22% — say that he has made them less likely.
Tesla is the world’s most valuable automaker, worth more than the next dozen or so largest automakers combined. Musk’s stake in the company makes up more than a third of his wealth, according to Bloomberg.
Thanks in part to its aging vehicle line-up, Tesla’s total sales fell last year for the first time ever, although it reported record deliveries in the fourth quarter. The United States was Tesla’s largest market by revenue in 2024.
Musk hasn’t always been such a potential drag on Tesla’s reach. In February 2023, soon after Musk’s purchase of Twitter, Heatmap asked U.S. adults whether the billionaire had made them more or less likely to buy or lease a Tesla. Only about 29% of Americans reported that Musk had made them less likely, while 26% said that he made them more likely.
When Heatmap asked the question again in November 2023, the results did not change. The same 29% of U.S. adults said that Musk had made them less likely to buy a Tesla.
By comparison, 45% of likely U.S. voters now say that Musk makes them less likely to get a Tesla, and only 17% say that he has made them more likely to do so. (Note that this new result isn’t perfectly comparable with the old surveys, because while the new poll surveyed likely voters , the 2023 surveys asked all U.S. adults.)
Musk’s popularity has also tumbled in that time. As recently as September, Musk was eight points above water in Data for Progress’ polling of likely U.S. voters.
Since then, Musk has become a power player in Republican politics and been made de facto leader of the Department of Government Efficiency. He has overseen thousands of layoffs and sought to win access to computer networks at many federal agencies, including the Department of Energy, the Social Security Administration, and the IRS, leading some longtime officials to resign in protest.
Today, he is eight points underwater — a 16-point drop in five months.
“We definitely have seen a decline, which I think has mirrored other pollsters out there who have been asking this question, especially post-election,” Data for Progress spokesperson Abby Springs, told me .
The new Data for Progress poll surveyed more than 1,200 likely voters around the country on Friday, February 14, and Saturday, February 15. Its results were weighted by demographics, geography, and recalled presidential vote. The margin of error was 3 percentage points.
On Washington walk-outs, Climeworks, and HSBC’s net-zero goals
Current conditions: Severe storms in South Africa spawned a tornado that damaged hundreds of homes • Snow is falling on parts of Kentucky and Tennessee still recovering from recent deadly floods • It is minus 39 degrees Fahrenheit today in Bismarck, North Dakota, which breaks a daily record set back in 1910.
Denise Cheung, Washington’s top federal prosecutor, resigned yesterday after refusing the Trump administratin’s instructions to open a grand jury investigation of climate grants issued by the Environmental Protection Agency during the Biden administration. Last week EPA Administrator Lee Zeldin announced that the agency would be seeking to revoke $20 billion worth of grants issued to nonprofits through the Greenhouse Gas Reduction Fund for climate mitigation and adaptation initiatives, suggesting that the distribution of this money was rushed and wasteful of taxpayer dollars. In her resignation letter, Cheung said she didn’t believe there was enough evidence to support grand jury subpoenas.
Failed battery maker Northvolt will sell its industrial battery unit to Scania, a Swedish truckmaker. The company launched in 2016 and became Europe’s biggest and best-funded battery startup. But mismanagement, production delays, overreliance on Chinese equipment, and other issues led to its collapse. It filed for Chapter 11 bankruptcy protection in November and its CEO resigned. As Reutersreported, Northvolt’s industrial battery business was “one of its few profitable units,” and Scania was a customer. A spokesperson said the acquisition “will provide access to a highly skilled and experienced team and a strong portfolio of battery systems … for industrial segments, such as construction and mining, complementing Scania's current customer offering.”
TikTok is partnering with Climeworks to remove 5,100 tons of carbon dioxide from the air through 2030, the companies announced today. The short-video platform’s head of sustainability, Ian Gill, said the company had considered several carbon removal providers, but that “Climeworks provided a solution that meets our highest standards and aligns perfectly with our sustainability strategy as we work toward carbon neutrality by 2030.” The swiss carbon capture startup will rely on direct air capture technology, biochar, and reforestation for the removal. In a statement, Climeworks also announced a smaller partnership with a UK-based distillery, and said the deals “highlight the growing demand for carbon removal solutions across different industries.”
HSBC, Europe’s biggest bank, is abandoning its 2030 net-zero goal and pushing it back by 20 years. The 2030 target was for the bank’s own operations, travel, and supply chain, which, as The Guardiannoted, is “arguably a much easier goal than cutting the emissions of its loan portfolio and client base.” But in its annual report, HSBC said it’s been harder than expected to decarbonize supply chains, forcing it to reconsider. Back in October the bank removed its chief sustainability officer role from the executive board, which sparked concerns that it would walk back on its climate commitments. It’s also reviewing emissions targets linked to loans, and considering weakening the environmental goals in its CEO’s pay package.
A group of 27 research teams has been given £81 million (about $102 million) to look for signs of two key climate change tipping points and create an “early warning system” for the world. The tipping points in focus are the collapse of the Greenland ice sheet, and the collapse of north Atlantic ocean currents. The program, funded by the UK’s Advanced Research and Invention Agency, will last for five years. Researchers will use a variety of monitoring and measuring methods, from seismic instruments to artificial intelligence. “The fantastic range of teams tackling this challenge from different angles, yet working together in a coordinated fashion, makes this program a unique opportunity,” said Dr. Reinhard Schiemann, a climate scientist at the University of Reading.
In 2024, China alone invested almost as much in clean energy technologies as the entire world did in fossil fuels.
Editor’s note: This story has been updated to correct the name of the person serving as EPA administrator.
Rob and Jesse get real on energy prices with PowerLines’ Charles Hua.
The most important energy regulators in the United States aren’t all in the federal government. Each state has its own public utility commission, a set of elected or appointed officials who regulate local power companies. This set of 200 individuals wield an enormous amount of power — they oversee 1% of U.S. GDP — but they’re often outmatched by local utility lobbyists and overlooked in discussions from climate advocates.
Charles Hua wants to change that. He is the founder and executive director of PowerLines, a new nonprofit engaging with America’s public utility commissions about how to deliver economic growth while keeping electricity rates — and greenhouse gas emissions — low. Charles previously advised the U.S. Department of Energy on developing its grid modernization strategy and analyzed energy policy for the Lawrence Berkeley National Laboratory.
On this week’s episode of Shift Key, Rob and Jesse talk to Charles about why PUCs matter, why they might be a rare spot for progress over the next four years, and why (and how) normal people should talk to their local public utility commissioner. Shift Key is hosted by Jesse Jenkins, a professor of energy systems engineering at Princeton University, and Robinson Meyer, Heatmap’s executive editor.
Subscribe to “Shift Key” and find this episode on Apple Podcasts, Spotify, Amazon, or wherever you get your podcasts.
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Here is an excerpt from our conversation:
Robinson Meyer: I want to pivot a bit and ask something that I think Jesse and I have talked about, something that you and I have talked about, Charles, is that the PUCs are going to be very important during the second Trump administration, and there’s a lot of possibilities, or there’s some possibilities for progress during the Trump administration, but there’s also some risks. So let’s start here: As you survey the state utility landscape, what are you worried about over the next four years or so? What should people be paying attention to at the PUC level?
Charle Hua: I think everything that we’re hearing around AI data centers, load growth, those are decisions that ultimately state public utility commissioners are going to make. And that’s because utilities are significantly revising their load forecasts.
Just take Georgia Power — which I know you talked about last episode at the end — which, in 2022, just two years ago, their projected load forecast for the end of the decade was about 400 megawatts. And then a year later, they increased that to 6,600 megawatts. So that’s a near 17x increase. And if you look at what happens with the 2023 Georgia Power IRP, I think the regulators were caught flat footed about just how much load would actually materialize from the data centers and what the impact on customer bills would be.
Meyer:And what’s an IRP? Can you just give us ...
Hua: Yes, sorry. So, integrated resource plan. So that’s the process by which utilities spell out how they’re proposing to make investments over a long term planning horizon, generally anywhere from 15 to 30 years. And if we look at, again, last year’s integrated resource plan in Georgia, there was significant proposed new fossil fuel infrastructure that was ultimately fully approved by the public service commission.
And there’s real questions about how consumer interests are or aren’t protected with decisions like that — in part because, if we look at what’s actually driving things like rising utility bills, which is a huge problem. I mean, one in three Americans can’t pay their utility bills, which have increased 20% over the last two years, two to three years. One of the biggest drivers of that is volatile gas prices that are exposed to international markets. And there’s real concern that if states are doubling down on gas investments and customers shoulder 100% of the risk of that gas price volatility that customers’ bills will only continue to grow.
And I think what’s going on in Georgia, for instance, is a harbinger of what’s to come nationally. In many ways, it’s the epitome of the U.S. clean energy transition, where there’s both a lot of clean energy investment that’s happening with all of the new growth in manufacturing facilities in Georgia, but if you actually peel beneath the layers and you see what’s going on internal to the state as it relates to its electricity mix, there’s a lot to be concerned about.
And the question is, are we going to have public utility commissions and regulatory bodies that can adequately protect the public interest in making these decisions going forward? And I think that’s the million dollar question.
This episode of Shift Key is sponsored by …
Download Heatmap Labs and Hydrostor’s free report to discover the crucial role of long duration energy storage in ensuring a reliable, clean future and stable grid. Learn more about Hydrostor here.
Music for Shift Key is by Adam Kromelow.