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Plus cheese and eggs, if you want to go all the way.

It was burrito night — I had some tortillas, salsa, guacamole and red onion in my refrigerator, but all our meat was still frozen, and I didn’t have any beans handy. So I did what any climate reporter with an interest in food systems would do and grabbed a pack of meatless “carne asada” I’d picked up out of curiosity and threw it into the mix. The end result was more “huh” than “wow,” but it held its own — with a little help from some hot sauce.
Growing, raising, processing and transporting food is responsible for roughly a quarter of worldwide greenhouse gas emissions, nearly 60% of which comes from meat production, according to one estimation. If you're concerned about your personal carbon impact, eating less meat is probably on your to-do list. But what if you still like a carne asada burrito? Thankfully, there are plenty of companies working on satisfying your cravings, no animals involved.
There are lots of other food system concerns that won’t make it into this guide — things like agricultural livelihoods, water use, and animal well-being. But if you’re curious about how fake meats work, what they taste like, and their emissions impact, here’s what you’ll want to know.
Ben Kelley, owner and proprietor of Kelley Farms Kitchen, a vegan restaurant in Harpers Ferry, WV. Ben and his wife Sondra started Kelley Farms after going vegan themselves more than a decade ago. The cafe offers a mix of housemade and commercially available meat alternatives.
Ismael Montanez, the program manager at University of California Berkeley’s Alt Meat Lab, where he’s focused on food and sustainability broadly. He is co-founder and former CTO of plant-based lamb company Black Sheep Foods and eats both meat and plant-based replacements.
Andrea Cecchin, senior agriculture and carbon researcher at HowGood, a sustainability ratings company. Cecchin told me he and his family limit the amount of meat they eat but are focused on a wider plant based diet.
It’s a multi-trillion dollar question, frankly. While the worldwide food system is far more complex than individual consumer choices, shifts in demand for food products, especially among higher-income individuals, have created changes, such tripling the price of quinoa during a boom in its popularity in mid-2010s. The U.S. and China’s growing middle classes also drove a spike in pork demand, only to have that growth slow and reverse in the past few years over health concerns.
The plant-based meat alternatives currently available at your grocery store may be highly processed, but they’re different from the cultivated or “lab-grown” meat coming from a new batch of food companies that seek to “grow” meat from scratch on the cellular level. In theory, this would create direct replacements for things like steaks or fish without actually requiring us to raise actual animals. Almost all of these products are still in the research and development stage, however, and none are currently commercially available in the U.S.
Let’s not mince words: There is no such thing as carbon-neutral beef. How to reduce cattle’s climate impact is an area of active research, encompassing supplements and dietary changes, breeding programs to create animals that process food more efficiently, and even methane-sucking gas masks. There are also ranchers committed to using specific grazing techniques that encourage extra retention of soil carbon, thereby offsetting emissions from cows, but “the science is not there yet” on the scale of sequestration needed for fully carbon-neutral meat, Cecchin says. “Climate-friendly” or “low-carbon” meat labels have been criticized for a lack of data transparency and only represent a 10% reduction in beef emissions overall.
The process of making plant-based mock meats is basically the reverse of their animal version, Montanez explained. While meat is made by processing animals into specific cuts or parts, plant-based replacements use protein-packed flours and other ingredients to build the “meat” back up.
Almost all fake red meat products will have a smaller greenhouse gas impact than their animal versions, Cecchin explained. Compared to a beef burger, the alternatives “really bring down the carbon footprint — the amount of water we need to use, and the amount of land that we use” per unit of food. But for other products, the savings are less clear. Chicken, for instance, has a much lower footprint, meaning replacements have to compete against a “very efficient industry and a very efficient meat.”
Processing details are rarely public, making it difficult to declare other meat replacements automatic emissions winners. “It’s really company by company, and could even be year by year as processing efficiencies change,” Cecchin said, adding that he hopes more companies will show clear evidence of their total emissions, including being specific about what they are comparing against.
Fake animal products are also not the same nutritionally as actual animal products, in ways that can be positive or negative depending on your specific dietary needs. An allergy to soy or wheat gluten would immediately knock out a good portion of these options, and my carne asada came with a warning to anyone “sensitive” to fungi.
There are generally more carbs, less fat, and more fiber in substitutes compared to meat, but protein levels can vary widely, and sodium levels can be high (e.g. Impossible burgers have just as much fat and more salt than a 80% lean beef burger of the same size, though zero cholesterol). As with any processed or prepared food, a look at the nutritional label is well worth it.
The experts all enjoyed the big-name beef replacements — Cecchin even said he has chosen Impossible and Beyond patties over regular burgers while eating out. If you have a little more time, though, Kelley said to skip the fast food fake burgers and make them yourself. Making good tasting meat replacements isn’t all that different from cooking meat itself: spices, technique and how it integrates into a meal makes all the difference. This is the case whether he’s using Impossible beef on the restaurant griddle or hand-making a black bean and chickpea patty. “Just like a raw piece of chicken,” he said, “it's about how you cook it.”
Everyone I spoke to said most breaded chicken replacements match their animal versions pretty well — Montanez even called them “most consistently tasty” than their actual meat equivalents, which for him was enough to justify the slight additional cost. He said he thinks Impossible’s chicken nuggets are the “most convincing” — although he also cautioned that he doesn’t eat a lot of breaded meat products in the first place.
Morningstar Farms’ Chik Patty has been a go-to at-home lunch in my house for nearly three decades, primarily because of that consistency and ease of preparation. (The “buffalo” flavor is by far the best, in my opinion.) Kelley uses Gardein’s Chick’n on one of their most popular sandwiches at the restaurant — they’re a big fan of the company and product.
Don’t expect a lot of options for raw chicken alternatives, however. Montanez suspects the economics of competing with relatively cheap meat isn’t attractive to companies, especially when prepared breaded versions, both animal and plant-based, are already popular.
“Emulating the flavor of American chicken is relatively easy and shouldn't be seen as a significant achievement,” Montanez said. “What’s truly interesting is creating a versatile analog that can withstand the same cooking conditions as real chicken.”
Kelley’s favorite meat replacement is Beyond’s bratwurst sausage, made with pea protein and avocado oil. He uses it in a variety of meals at his cafe, as well as to grill up at home, sometimes adding it to pasta.
Steak and other meats that include marbled fats have been a particularly tricky nut to crack for fake meat producers because the traditional extrusion process makes it difficult to capture fat alongside protein. Montanez told me Juicy Marbles has developed a process capable of doing both, which it’s used to create filet and loin products.
Montanez’s favorite fake bacon is only available in a vegan deli in Berkeley, California, but generally both he and Kelley haven’t found full bacon strips that really match the experience of eating bacon. “There's no way to hold it after you cook it without it drying out,” Kelley said. Instead, he likes using soy [bacon] crumbles in various dishes, including in his potato salad.
The pepperoni and other fermented charcuterie from Prime Roots is “quite impressive, even from a meat eater’s perspective,” Montanez told me. The company starts its process with koji, a strain of fungus that has been part of Japanese cuisine for hundreds of years, including in the product of soy sauces and sake.
The deli slices Kelley uses in sandwiches like reubens or Italian hoagies are made with seitan or a mix of seitan and soy, from a variety of companies. But the Tofurky brand (not just turkey) is one of their favorites. “We are always testing new recipes of our own and using reliable and ethical companies that we grew up loving,” he said.
Kelley has yet to be convinced by most seafood replacements, he told me. “All the seafood is kind of just the same as the chicken replacements,” he said. Instead, he uses unripe jackfruit – a common meat replacement with a stringy texture – hearts of palm, and spices to replicate crab cakes. Having an exact match isn’t always a priority for Kelley, who’d rather highlight an ingredient that serves as a replacement rather than calling it by its faux name. His lobster roll replacement is made with hearts of palm, but it’s not “vegan lobster” on his menu, it’s a “hearts of palm” roll.
Texture is a “very difficult thing in seafood,” Montanez said. “I haven't seen anything myself where it is 100% convincing,” but he points out companies like Impact Food that are making plant-based sushi without extrusion or fermentation, currently available in some New York and California restaurants.
Montanez also called out vegan cheese as a category that struggles to match its original, citing texture, not flavor, as the sticking point, especially when it needs to work in a multitude of different recipes. “You might see a vegan cheese that’s okay applied in pieces,” he said, “but it's only as good if you put it in pizza oven temperatures.” An exception to the rule for him is Climax Foods’ blue cheese, which almost pulled off a Judgment of Paris-like upset in a food competition this year before being removed from the running.
Montanez identified Quorn as a brand that’s not trying to replicate meat exactly, but tastes good on its own. The British company has a wide range of no-meat products that feel like they could have a home in a Tesco, from a vegan Yorkshire ham to mini sausage rolls to “picnic eggs.”
Approaches to fake meat taste fall on a spectrum. On one end are companies that try to replicate as closely as possible the taste, texture, and smell of some specific meat product — say, a chicken nugget. (Your personal mileage may vary when it comes to replicas of more complicated meat cuts such as steaks or pork chops.) On the other end are brands that offer a functional, hopefully flavorful replacement for meat in a meal but otherwise aren’t trying to fool anyone.
The former approach involves more materials science and chemistry, Montanez told me. For example, Impossible makes a soy version of a key molecule in meat known as heme and combines it with a carefully calibrated proportion of sugars, fats, and water to induce the Maillard reaction, the process that makes meat brown and form a crust. It’s possible to create a similar meaty flavor profile without heme (Impossible has a patent on their version), but they have their own complications.
“It’s those sugars reacting with the proteins and creating these molecules that ultimately result in a meaty aroma or flavor,” Montanez said.
Kelley Farm’s menu is a good example of the wider ingredient possibilities of meat replacements beyond this approach. In addition to Impossible patties, Beyond brats, and Gardein’s Chick’n, the restaurant also serves deli meat replacements made with seitan (basically textured wheat gluten); folded eggs made from mung beans; BBQ pulled pork made from jackfruit, which mimics that stringy texture naturally (I’ve had both Kelley Farms’ barbeque sandwich and commercial jackfruit BBQ versions and would happily eat either again); and a burger patty that’s their own mix of chickpeas and black beans.
It’s also worth noting that there is a more literal approach to eating a plant-based diet that’s already the standard in many other countries — that is, rather than replacing meat products with fake meat products, just eat more plants. If you feel like you’re missing out on protein, beans, lentils, tofu, and certain grains like quinoa, farro or teff, have high amounts.
Highly engineered meat substitutes are often more expensive than the animal products they are replacing, so if you’re struggling with hunger, have specific dietary requirements, anxiety around food, or an eating disorder, concerns about emissions shouldn’t even enter the picture.
For that matter, just reorienting your approach to eating meat saves a lot of carbon on its own. Kelley told me he reaches for meat replacements when he’s craving something specific, while Cecchin prefers meat alternatives when he’s eating out.
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The Science Based Targets Initiative just released a major update to its signature rulebook for setting climate goals.
Companies have a new rulebook for what constitutes credible climate action. The Science Based Targets Initiative, an organization that seeks to align corporate sustainability plans with the goals of the Paris Agreement, published a major update to its signature Net Zero Standard on Thursday designed to help companies assess their progress on climate goals, not just set them.
The update marks a significant expansion of the standard, which previously defined what a good corporate emissions target looked like, but did not say much about how to achieve it. The new version sets requirements for what companies must do to prove they are advancing toward their benchmarks.
“The standard is moving from being focused on ambition only to really focused on implementation,” Alberto Carrillo Pineda, the SBTi’s co-founder and chief technical officer, told me.
This accompanies a broader rhetorical shift in the standard, which asks companies to demonstrate progress on a “best-efforts basis” rather than judging them solely on absolute emissions reductions. In the foreword to the standard, Chair Francesco Starace says that the SBTi made “an explicit choice to recognize that companies do not control everything, and that pretending otherwise does not serve anyone.”
That ethos permeates the revisions and additions to the standard. Here’s a breakdown of some of the biggest changes.
Version 2 of the standard introduces a new “implementation hierarchy.” Companies must first do everything in their power to reduce emissions directly. Once they have exhausted those options, they can then pursue indirect actions such as buying renewable energy certificates or certificates for low-carbon cement.
This isn’t just a guideline. It’s a reporting requirement. Companies are asked to “document and demonstrate” all of the actions they have assessed and implemented to reduce their emissions directly, as well as to define the constraints to pursuing additional reductions. They also have to describe their indirect actions and explain how they “complement, and do not substitute for” direct reductions.
The updated standard differentiates between larger and smaller companies, and those based in higher-income and lower-income countries, recognizing that the former in both cases will have an easier time decarbonizing than the latter.
Larger companies in higher-income countries, referred to as “category A companies” are required to set near-term, five-year targets for all emissions related to their businesses, whether they fall under scope 1, 2 or 3. All others are required to set targets only for scope 1 and 2. Category A companies are also required to verify much of their reporting to the SBTi with a third party, while this is optional for other companies.
The updated standard clarifies that in order for renewable energy certificates to count toward a company’s scope 2 target, they must be “deliverable,” or purchased from a clean energy source within the same grid region as the company. That means a company with offices or factories in Idaho can’t buy certificates from a solar farm in Florida. (The standard does seem to offer some wiggle room on that rule to companies with many locations.)
An earlier draft of the new standard released last year would have required that companies set targets for purchasing hourly-matched, deliverable clean electricity. That would mean looking at their energy consumption for every hour they operate and setting a goal to match it with an equivalent amount of locally produced clean power for a certain percentage of hours.
Much to the disappointment of proponents of this strategy, however, that’s not in the final standard. Companies can set scope 2 targets on an annual matching basis, meaning they can effectively claim they consumed solar power at night and will not have to do the hard work of trying to clean up the harder-to-decarbonize hours of the day.
The standard does, however, require those larger companies in category A to at least report the percentage of their energy use that they have matched with clean power on an hourly basis. This reporting rule aligns with a proposal by the Greenhouse Gas Protocol, a separate corporate standard-setter focused on emissions accounting. The SBTi also aims to encourage companies to make progress on hourly-matched clean power by creating a new dashboard showing which companies have exceeded certain benchmarks — 50% until 2030, 75% until 2035, and 90% from that year onward.
Previously, regular old carbon credits like the kind that pay a Brazilian landowner not to cut down trees or fund a methane capture system at a landfill had no place in the SBTi’s net-zero standard. Also, while the “net-zero” in the name implied that companies should eventually begin investing in carbon removal credits to make up for any residual emissions, the earlier version did not say when they should start doing that.
Now, the SBTi says it will require category A companies to begin covering some of their ongoing emissions with carbon removal beginning in 2035. Because companies are only required to set targets in five year increments, they won’t have to report on those efforts for several years. But the carbon removal industry will require investment now to be able to meet demand in 2035, so companies will likely need to begin buying credits today in order to meet that deadline.
Prior to 2035, companies will be able to earn kudos for purchasing carbon avoidance and removal credits by participating in something the SBTi is calling the “ongoing emissions responsibility program.” The program has three tiers that will recognize companies that are contributing to a lower, medium, and high degrees of carbon mitigation, ranked either by tallying dollars spent or tons of carbon abated. Companies will still not be allowed to count these credits when measuring progress toward their targets, however.
One question hanging over the news is whether the SBTi’s definition of a “science based target” is still appropriate. The organization requires companies to calibrate their targets to be consistent with limiting warming to 1.5 degrees Celsius above pre-industrial levels by the end of the century. But many scientists believe the world has already warmed more than 1.5 degrees. In theory, cooling the planet back down to this level by 2100 is still possible with a huge amount of carbon removal, but it appears exceedingly unlikely.
“Of course, there is healthy scientific debate about what is the most likely temperature outcome, so that's something that we are aware of,” Pineda said when I asked about this. “But we maintain the focus to catalyze transformation consistent with achieving net-zero emissions by mid-century.”
Pineda may have been downplaying how much the SBTi has considered this. After our call, I did a search for “1.5°” in the new version of the standard and the old one. The temperature target appeared 59 times in the old document, but just once in the new one, and only in the executive summary, where it was used to describe the SBTi’s larger mission as an organization. Nevertheless, the standard continues to emphasize a long-term goal of net-zero emissions by 2050, and there is no indication that the underlying modeled decarbonization pathways that the SBTi uses to validate targets are going to change.
SpaceX and Tesla have produced executives and founders across the clean energy world. Here’s what they had to say about working for their former boss.
While SpaceX founder and Tesla CEO Elon Musk is often lauded for turning technology like reusable rockets and American-made electric vehicles into thriving businesses in a way long thought impossible, or at least improbable, he has also more quietly done something about as unlikely: get investors excited about capital-intensive hard tech startups.
For most of the time Musk was sleeping on the floor of Tesla’s factory to oversee Model 3 assembly and his rockets were riding across the country on the back of flatbed trucks, the venture capitalists that fund the next generation of technology companies were largely enamored with software businesses, which required little capital to start up and could scale quickly with accelerating profitability.
Today, thanks in no small part to Musk, hard tech companies are able to raise hundreds of millions of dollars within a few years of being starting up, with top-flight venture capital firms such as Andreessen Horowitz building whole funds devoted to the broad sector.
That investor interest has helped nurture a series of startups founded and led by former SpaceX and Tesla employees. These types of businesses don’t have the forgiving characteristics of software companies; instead, they’re often incredibly capital intensive, and require years of design and manufacturing before profits show up. Climate tech and energy companies almost inevitably fall in this category, often working on trying to turn technology that may mostly exist in a lab with nascent markets and high barriers to scale into something that can generate real returns for investors.
To mark the occasion of SpaceX’s initial public offering, Heatmap decided to survey the landscape of SpaceX and Tesla alumni now cutting their own swath through the climate tech marketplace. We identified 40 founders and executives, who all together spent a total of 252 years working for Musk. They’ve since moved on to companies in 9 different industries, from Musk-adjacent categories such as batteries and electric vehicles to carbon removal and grid tech. Cumulatively they’ve raised at least $27 billion, according to the data available in Crunchbase. (Since we finalized this list, one more Musk alum-founded company has emerged from stealth. Welcome to the world, Ambrosia Energy.)
Heatmap asked these founders and executives by email what they learned from their experiences working at Musk-led companies, and we heard back from more than a dozen of them. The vast majority of those told us it was no accident that they’d ended up where they have after working for Musk.
“While working at Tesla, I was surrounded by people who were there for the hard stuff and thrived on it,” Mateo Jaramillo, co-founder and CEO of the long-duration battery company Form Energy and a former Tesla Energy vice president, told us. “It's not just that they tolerated it — that was the stuff they lived for. There are moments in a company's arc when that kind of mentality is required, and at Tesla in those days it was like walking through a crucible every single day, with truly no idea how things were going to resolve. And yet you keep going and figure it out along the way.”
Musk himself has been a formidable digester of investor capital, including from Founders Fund, the venture capital firm founded by his former PayPal colleague Peter Thiel, which invested in SpaceX before its first successful launch.
Founders Fund has since become an investor in several Musk-alumni-founded companies, including the fuel enrichment startup General Matter, the geothermal company Endurance Energy, and the hydrogen company Hgen.
Another frequent investor, Andreessen Horowitz, had previously been the great promoter of software businesses. Its cofounders Marc Andreessen and Ben Horowitz wrote the seminal essay “Why Software Is Eating The World,” which became a manifesto for its investments in businesses like Facebook (now Meta) and Twitter (now X). Since then, a16z, as it’s known, has expanded its remit and invested in several Musk-alumni founded companies, including the power electronics company Heron Power, the mining services company Mariana Minerals, electric boat company Arc, and home battery company Base Power.
These investments are not just simply giving money to Tesla and SpaceX employees to do the same things they did in their previous jobs. Many of the companies we looked at were founded by SpaceX alumni and have nothing to do with space, rockets, or satellites.
Mike Schroepfer, former Meta chief technical officer and founder of hard tech VC firm Gigascale Capital, which has invested in Heron and Form, as well as battery systems company Arbor and nuclear microreactor company Radiant, told us that when founders have a Musk company on their resume, it tells him “they’ve been trained to build in the physical world, which is rarer than people think.”
And what’s rare can be profitable.
“Hardware is capital-intensive for the best possible reason” Schroepfer said. “You’re building the foundations the world runs on, and those things have to work reliably and get cheaper as they scale. The dollar figure tells you investors are starting to take the physical world seriously again.”
Philip Schröder, who left the European battery startup Sonnen to run Tesla’s Germany and Austria business, told us that after he rejoined his former company, the European battery startup, they were able to raise “one of the largest cleantech financing rounds in Europe.”
It’s not just raising money where a SpaceX or Tesla pedigree helps. Many former employees of the two companies left with enough of a financial cushion to take a risk on something new. When asked how being part of SpaceX helped him found his own company, John Bucknell, who worked on the Raptor rocket engine at SpaceX, said that having worked for Musk gave him the “financial freedom” necessary to start a company — in his case Virtus Solis, which is developing solar power in space.
But it also doesn’t hurt when raising money to put a SpaceX or Tesla logo on a slide deck, considering the size of returns they’ve generated for their backers.
Former Tesla employees have started and run some of the buzziest and best funded battery, transportation, and electrical infrastructure companies in the world. These include Lucid Motors, led until recently by former Tesla VP of vehicle engineering Peter Rawlinson, battery recycling company Redwood Materials, founded by former Tesla chief technical officer J.B. Straubel, and Heron Power, founded by Drew Baglino, who worked at Tesla from 2006 to 2024, ending his career there leading its powertrain and energy divisions.
When asked how their current work was connected to their past work for Musk or what they had learned, the founders and executives we surveyed — especially the SpaceX alumni — focused more on management and engineering principles than anything specific to energy or transportation.
“You can get way more done in a day and can move way faster than you think,” Justin Lopas, the co-founder of the home battery company Base Power, and a former manufacturing engineer at SpaceX, told us of what he’d learned from Musk.
Musk’s legendary short deadlines (which he says he only expects to hit about half the time) came up frequently among the group. Describing his time at Tesla, Arch Rao, the founder and chief executive of the smart electric panel company Span and a former head of products at Tesla Energy, told us, “The milestones to hit were incredibly audacious, but with the right group of people, possible. This has been a key model for how Span has scaled from the very early days to today.”
Jonathan Criss, the co-founder and chief executive of the desalination company Vital Lyfe, who worked at SpaceX for over a decade on both the Dragon spacecraft and the satellite communications service Starlink, told us that the rocket company had a unique “building for rate” philosophy, where engineers work backwards from a specific production goal, as opposed to first designing a product and then figuring out how to manufacture it as cheaply as possible. “That capability lets us design and manufacture highly reliable products at a fraction of the cost of most of the industry,” Criss said.
Investors, too, recognize SpaceX and Tesla alumni’s ability to work fast. Schroepfer, of Gigascale Capital, told us that speed sets these founders apart. “They know physical products can take years to get from first unit to cost-competitive scale. Even with a long timeline, they move with urgency,” he said. “They get how iteration and cost-down curves only work if you move fast, learn fast, and scale deliberately.”
Several founders also talked about learning to challenge assumptions. “At Tesla, there was a strong culture of questioning established ways of doing things,” Enric Asuncion, the co-founder and CEO of the EV charging company Wallbox who worked as a program manager for vehicle charging at Tesla, told us. Austin Spiegel, the co-founder and CEO of the infrastructure management software company Sift and a former software engineer at SpaceX, said that his former employer never accepted that something was good enough just because it existed. “Instead of buying off-the-shelf software, they asked, what would this look like if we designed it for a company that's going to launch and land rockets for the first time? That stuck with me.”
A former product engineer for Tesla’s Powerwall battery business, Cole Ashman, gave another example. He described how, for years, enabling a home to island from the power grid during a blackout required a labor-intensive, expensive electrical job. Tesla engineered a backup switch that was quicker and easier to install, but it required utility cooperation. “Conventional wisdom said it would never get broad approval,” Ashman, who founded the battery startup Pila, told us. “Tesla did the unglamorous work of bringing utilities along and moving the codes and standards — and pulled the whole industry forward.”
The other management concept that came up frequently was “ownership,” the idea of devolving responsibility down to engineers who were directly responsible for the projects they were working on. Working at SpaceX “taught me how to run a challenging hardware development program: how to choose and organize engineers around a tough unsolved problem, and give each of them real ownership from concept to mission success,” Colin Ho, founder and chief technology officer at the electrolyzer company Hgen, told us.
Frank Tybor, the chief technical officer at Infravision, the drone grid maintenance company and a former launch engineer at SpaceX, told us that “one of the things that made SpaceX special was the concentration of exceptionally talented people who were willing to take ownership of difficult problems and work across traditional organizational boundaries to solve them.”
Andreessen has endorsed the description of Musk-run companies and SpaceX specifically as a “zone of shocking competence” that attracts the best engineers, which its alumni founders have tried to recreate. Justin Cohen, the founder and CEO of Maritime Fusion who did stints at both Tesla and SpaceX, told us the talent network was “analogous to SEAL Team 6 of engineering; there is no better on earth.”
Several mentioned the Musk alumni network as a recruitment resource for their own businesses. “Tesla has cultivated a highly passionate ecosystem of engineers and tech developers,” Rao, the Span founder, told us. “My experience at Tesla helped me quickly identify what a skillful talent pool looks like and expect rapid and ambitious development from them.”
Brad Hartwing, a former SpaceX manufacturing engineer and founder and chief executive of Arbor Energy told us that “several early Arbor employees came from SpaceX, and that shared experience helped us build a world-class engineering team quickly. Many of us have worked on complex, high-stakes technology; we’ve already proven that we can execute in demanding environments, which helps when building a hard-tech company from scratch.”
When asked to name specific, non-Musk employees that influenced them, one name came up more than another: J.B. Straubel, the former Tesla chief technology officer and founder of Redwood Materials.
“Straubel is easily one of the smartest yet incredibly humble engineers and leaders I’ve had the opportunity to work with,” Rao told us.
Straubel, along with Heron Power’s Drew Baglino, “were both influential in how they helped solve complex problems within the company while dealing with constant pressure on cash & company survival,” Kunal Girotra, former Tesla Energy chief and founder of the battery company Lunar Energy, told us.
Jaramillo, the Form Energy founder, also singled out Straubel and Baglino, saying, “They’re very different people from each other, but both technically world class, with incredibly high standards. They drove that mindset into their teams from an engineering perspective — to never compromise on those standards.” About Straubel specifically, Jaramillo said that he had an “amazingly calibrated impatience, to know precisely when enough study is done, to just push start and get going in the physical world, and accept that you're going to learn things along the way.”
While Musk and his legions of former employees have helped turn hard tech and climate tech into an investible sector for venture capitalists, the amount of money the companies we’ve looked at have raised — about $30 billion — pales in comparison to the hottest sector, artificial intelligence. Even SpaceX, the signature hard tech company of its era, is itself running a massive “neo-cloud” business, renting out data center capacity to companies like Anthropic and Google to the tune of around $2 billion a month.
That being said, Tesla and SpaceX, which together are worth around $3 trillion, will continue to produce engineers and managers with sizable net worths and resumes uniquely looked favorably on by investors.
More than 4,000 current and former SpaceX employees are expected to become instant millionaires after the IPO, with 400 potentially getting at least $100 million, generating a wave of wealth that can give potential founders the cushion necessary to found their own company — or the capital necessary to become investors themselves.
“I think this is the emergence of a hardware mafia,” Schroepfer told us. “The PayPal mafia helped define an era of software and internet companies. This group will probably define an era where the center of gravity moves back toward atoms: energy, industry, mobility, infrastructure, manufacturing, and the physical systems that modern life depends on.”
On Texas data centers, Holtec’s New Jersey plans, and Polish renewables
Current conditions: Las Vegas is well over 100 degrees Fahrenheit, and could hit 110 degrees by tomorrow • Tropical Storm Cristina is deluging Central America as it barrels toward the coast of El Salvador • Temperatures are already 110 degrees in Minab, Iran, where American missiles struck early this morning.
The two-month ceasefire is over. U.S. strikes on Iran began again Wednesday and continued early this morning as President Donald Trump vowed to make Tehran “pay the price” for stalled negotiations to end the conflict. The second day of strikes came hours after U.S. allies Bahrain, Kuwait, and Jordan came under Iranian missile fire. In response, oil prices surged yet again, right as U.S. inflation data showed a 4% price spike last month as higher energy prices ripple through the economy. Inflation is now at its highest level since April 2023. The price of West Texas Intermediate crude, the benchmark for American oil, shot up nearly 4% on Wednesday following the strikes, roughly twice the increase for the European and Emirati benchmarks.

Solar panels supplied a record 12.8% of the United States’ electricity last month, while coal fell to 12.2% in its fourth-lowest monthly share ever, according to a new analysis by the pro-renewables think tank Ember. It’s the first time in U.S. history that solar eclipsed coal for a whole month. Solar generated an all-time high of 45.5 terawatt-hours, exceeding its May 2025 output by 17% and surpassing last July’s previous record. This summer is on track to break yet more records. “U.S. solar power continues to set new records,” Nicolas Fulghum, a senior data analyst at Ember, said in a statement. “Overtaking coal for the first month on record shows just how far solar has come, from a niche contributor to the third-largest and fastest-growing source of power in the U.S. electricity system.”
The milestone comes as the U.S. prepares to produce more of its own solar panels. As I told you yesterday, America’s largest solar factory, South Korean giant Qcells’ plant in northern Georgia, is nearly at full capacity.
Texas has a reputation as a place where, if the land is yours, you can do what you want with it. That’s partly why the state has been such a hotbed for data center development. Well, the Republican leadership is pumping the brakes. In a letter to state regulators on Wednesday, Governor Greg Abbott recommended the legislature pass sweeping data center reforms. Among the policy changes The Texas Tribune highlighted:
The move comes in response to plummeting support among American voters for data center development. The latest poll from Heatmap Pro, which my colleague Robinson Meyer wrote up earlier this month, found that roughly three-quarters of U.S. voters now oppose data center development in their neighborhoods, including 55% who say they “strongly” oppose server farms.
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When the Department of Energy canceled the American Battery Technology Company’s nearly $58 million grant last October, it appeared to many as a sign that the Trump administration would go after virtually any firm awarded money by its predecessors, even if its business aligned with the White House’s policy priorities. But the Nevada-based battery and critical minerals startup said this week that the Energy Department had reinstated the grant, which was meant to support construction of the company’s first commercial lithium refinery. “Of the hundreds of DOE grants terminated last Fall very few have been able to successfully appeal the decisions and have their contracts reinstated,” American Battery Technology CEO Ryan Melsert said in a statement. “I am very proud of our team for relentlessly demonstrating the performance of these internally-developed critical mineral technologies and how crucial it is to implement and scale these commercial facilities to support the national security of the United States and enable its energy dominance.”
The Energy Department is also making moves on fusion. On Tuesday, the agency put out its roadmap for commercializing fusion energy, tapping more than 800 scientists to inform its analysis. “Fusion energy has entered a new era defined by extraordinary scientific progress and public-private momentum,” Darío Gil, the under Energy secretary for science, said in a statement. “With this roadmap, we now have the clarity, coordination, and sustained commitment needed to turn the promise of fusion into a reality for the American people.”
Holtec International was once the undertaker of the nuclear industry with a business split between manufacturing storage casks for spent fuel and decommissioning shuttered plants. But the company is nearly ready to turn a shuttered atomic power plant back online for the first time in U.S. history, with its Palisades nuclear station. It’s also considering rebuilding New York City’s defunct nuclear station, Indian Point. All the while, Holtec is racing to build its 300-megawatt pressurized water reactor. The first two units are set to debut at Palisades once the plant’s single older reactor is back online. Next it’s looking at building as many as four of the small modular reactors at Holtec’s half-demolished Oyster Creek nuclear station in southern New Jersey. If approved, the Asbury Park Press reported, the project would generate nearly 1.3 gigawatts of power.
I reached out to Patrick O’Brien, Holtec’s director of government affairs, who confirmed the story. “It’s a potential project post-Palisades SMRs,” he wrote in a text.
If you’re booking a flight right now, you might not yet be feeling the difference. But U.S. production of jet fuel has reached record highs as refiners scramble to respond to soaring prices following the closure of the Strait of Hormuz. By the start of May, the four-week average estimate of fuel production surpassed 2 million barrels per day for the first time on record, according to new analysis by the Energy Information Administration. But with domestic inventories still relatively high, much of that increased production is being exported.