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A platform to expedite clean energy projects
Businesses and developers often face a steep learning curve when installing clean energy technologies, such as solar installations and EV chargers. To get a fair deal, they need to navigate a complex bidding process that involves requesting proposals, evaluating bids, and ultimately contracting with a provider.
Now the startup Station A, founded by a pair of MIT alumni and their colleagues, is streamlining the process of deploying clean energy. The company has developed a marketplace for clean energy that helps real estate owners and businesses analyze properties to calculate returns on clean energy projects, create detailed project listings, collect and compare bids, and select a provider.
The platform helps real estate owners and businesses adopt clean energy technologies like solar panels, batteries, and EV chargers at the lowest possible prices, in places with the highest potential to reduce energy costs and emissions.
“We do a lot to make adopting clean energy simple,” explains Manos Saratsis MArch ’15, who co-founded Station A with Kevin Berkemeyer MBA ’14. “Imagine if you were trying to buy a plane ticket and your travel agent only used one carrier. It would be more expensive, and you couldn’t even get to some places. Our customers want to have multiple options and easily learn about the track record of whoever they’re working with.”
Station A has already partnered with some of the largest real estate companies in the country, some with thousands of properties, to reduce the carbon footprint of their buildings. The company is also working with grocery chains, warehouses, and other businesses to accelerate the clean energy transition.
“Our platform uses a lot of AI and machine learning to turn addresses into building footprints and to understand their electricity costs, available incentives, and where they can expect the highest ROI,” says Saratsis, who serves as Station A’s head of product. “This would normally require tens or hundreds of thousands of dollars’ worth of consulting time, and we can do it for next to no money very quickly.”
Building the foundation
As a graduate student in MIT’s Department of Architecture, Saratsis studied environmental design modeling, using data from sources like satellite imagery to understand how communities consume energy and to propose the most impactful potential clean energy solutions. He says classes with professors Christoph Reinhart and Kent Larsen were particularly eye-opening.
“My ability to build a thermal energy model and simulate electricity usage in a building started at MIT,” Saratsis says.
Berkemeyer served as president of the MIT Energy Club while at the MIT Sloan School of Management. He was also a research assistant at the MIT Energy Initiative as part of the Future of Solar report and a teacher’s assistant for course 15.366 (Climate and Energy Ventures). He says classes in entrepreneurship with professor of the practice Bill Aulet and in sustainability with Senior Lecturer Jason Jay were formative. Prior to his studies at MIT, Berkemeyer had extensive experience developing solar and storage projects and selling clean energy products to commercial customers. The eventual co-founders didn’t cross paths at MIT, but they ended up working together at the utility NRG Energy after graduation.
“As co-founders, we saw an opportunity to transform how businesses approach clean energy,” said Berkemeyer, who is now Station A’s CEO. “Station A was born out of a shared belief that data and transparency could unlock the full potential of clean energy technologies for everyone.”
At NRG, the founders built software to help identify decarbonization opportunities for customers without having to send analysts to the sites for in-person audits.
“If they worked with a big grocery chain or a big retailer, we would use proprietary analytics to evaluate that portfolio and come up with recommendations for things like solar projects, energy efficiency, and demand response that would yield positive returns within a year,” Saratsis explains.
The tools were a huge success within the company. In 2018, the pair, along with co-founders Jeremy Lucas and Sam Steyer, decided to spin out the technology into Station A.
The founders started by working with energy companies but soon shifted their focus to real estate owners with huge portfolios and large businesses with long-term leasing contracts. Many customers have hundreds or even thousands of addresses to evaluate. Using just the addresses, Station A can provide detailed financial return estimates for clean energy investments.
In 2020, the company widened its focus from selling access to its analytics to creating a marketplace for clean energy transactions, helping businesses run the competitive bidding process for clean energy projects. After a project is installed, Station A can also evaluate whether it’s achieving its expected performance and track financial returns.
“When I talk to people outside the industry, they’re like, ‘Wait, this doesn’t exist already?’” Saratsis says. “It’s kind of crazy, but the industry is still very nascent, and no one’s been able to figure out a way to run the bidding process transparently and at scale.”
From the campus to the world
Today, about 2,500 clean energy developers are active on Station A’s platform. A number of large real estate investment trusts also use its services, in addition to businesses like HP, Nestle, and Goldman Sachs. If Station A were a developer, Saratsis says it would now rank in the top 10 in terms of annual solar deployments.
The founders credit their time at MIT with helping them scale.
“A lot of these relationships originated within the MIT network, whether through folks we met at Sloan or through engagement with MIT,” Saratsis says. “So much of this business is about reputation, and we’ve established a really good reputation.”
Since its founding, Station A has also been sponsoring classes at the Sustainability Lab at MIT, where Saratsis conducted research as a student. As they work to grow Station A’s offerings, the founders say they use the skills they gained as students every day.
“Everything we do around building analysis is inspired in some ways by the stuff that I did when I was at MIT,” Saratsis says.
“Station A is just getting started,” Berkemeyer says. “Clean energy adoption isn’t just about technology — it’s about making the process seamless and accessible. That’s what drives us every day, and we’re excited to lead this transformation.”
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How cities are weathering the climate crisis
Several years ago, the residents of a manufactured-home neighborhood in southeast suburban Houston, not far from the Buffalo Bayou, took a major step in dealing with climate problems: They bought the land under their homes. Then they installed better drainage and developed strategies to share expertise and tools for home repairs. The result? The neighborhood made it through Hurricane Harvey in 2017 and a winter freeze in 2021 without major damage.
The neighborhood, known as Pasadena Trails, is part of a U.S. movement toward the Resident Owned Community (ROC) model for manufactured home parks. Many people in manufactured homes — mobile homes — do not own the land under them. But if the residents of a manufactured-home park can form an ROC, they can take action to adapt to climate risks — and ease the threat of eviction. With an ROC, manufactured-home residents can be there to stay.
That speaks to a larger issue: In cities, lower-income residents are often especially vulnerable to natural hazards, such as flooding, extreme heat, and wildfire. But efforts aimed at helping cities as a whole withstand these disasters can lead to interventions that displace already-disadvantaged residents — by turning a low-lying neighborhood into a storm buffer, for instance.
“The global climate crisis has very differential effects on cities, and neighborhoods within cities,” says Lawrence Vale, a professor of urban studies at MIT and co-author of a new book on the subject, “The Equitably Resilient City,” published by the MIT Press and co-authored with Zachary B. Lamb PhD ’18, an assistant professor at the University of California at Berkeley.
In the book, the scholars delve into 12 case studies from around the globe which, they believe, have it both ways: Low- and middle-income communities have driven climate progress through tangible built projects, while also keeping people from being displaced, and indeed helping them participate in local governance and neighborhood decision-making.
“We can either dive into despair about climate issues, or think they’re solvable and ask what it takes to succeed in a more equitable way,” says Vale, who is the Ford Professor of Urban Design and Planning at MIT. “This book is asking how people look at problems more holistically — to show how environmental impacts are integrated with their livelihoods, with feeling they can have security from displacement, and feeling they’re not going to be displaced, with being empowered to share in the governance where they live.”
As Lamb notes, “Pursuing equitable urban climate adaptation requires both changes in the physical built environment of cities and innovations in institutions and governance practices to address deep-seated causes of inequality.”
Twelve projects, four elements
Research for “The Equitably Resilient City” began with exploration of about 200 potential cases, and ultimately focused on 12 projects from around the globe, including the U.S., Brazil, Thailand, and France. Vale and Lamb, coordinating with locally-based research teams, visited these diverse sites and conducted interviews in nine languages.
All 12 projects work on multiple levels at once: They are steps toward environmental progress that also help local communities in civic and economic terms. The book uses the acronym LEGS (“livelihood, environment, governance, and security”) to encapsulate this need to make equitable progress on four different fronts.
“Doing one of those things well is worth recognition, and doing all of them well is exciting,” Vale says. “It’s important to understand not just what these communities did, but how they did it and whose views were involved. These 12 cases are not a random sample. The book looks for people who are partially succeeding at difficult things in difficult circumstances.”
One case study is set in São Paolo, Brazil, where low-income residents of a hilly favela benefitted from new housing in the area on undeveloped land that is less prone to slides. In San Juan, Puerto Rico, residents of low-lying neighborhoods abutting a water channel formed a durable set of community groups to create a fairer solution to flooding: Although the channel needed to be re-widened, the local coalition insisted on limiting displacement, supporting local livelihoods and improving environmental conditions and public space.
“There is a backlash to older practices,” Vale says, referring to the large-scale urban planning and infrastructure projects of the mid-20th century, which often ignored community input. “People saw what happened during the urban renewal era and said, ‘You’re not going to do that to us again.’”
Indeed, one through-line in “The Equitably Resilient City” is that cities, like all places, can be contested political terrain. Often, solid solutions emerge when local groups organize, advocate for new solutions, and eventually gain enough traction to enact them.
“Every one of our examples and cases has probably 15 or 20 years of activity behind it, as well as engagements with a much deeper history,” Vale says. “They’re all rooted in a very often troubled [political] context. And yet these are places that have made progress possible.”
Think locally, adapt anywhere
Another motif of “The Equitably Resilient City” is that local progress matters greatly, for a few reasons — including the value of having communities develop projects that meet their own needs, based on their input. Vale and Lamb are interested in projects even if they are very small-scale, and devote one chapter of the book to the Paris OASIS program, which has developed a series of cleverly designed, heavily tree-dotted school playgrounds across Paris. These projects provide environmental education opportunities and help mitigate flooding and urban heat while adding CO2-harnessing greenery to the cityscape.
An individual park, by itself, can only do so much, but the concept behind it can be adopted by anyone.
“This book is mostly centered on local projects rather than national schemes,” Vale says. “The hope is they serve as an inspiration for people to adapt to their own situations.”
After all, the urban geography and governance of places such as Paris or São Paulo will differ widely. But efforts to make improvements to public open space or to well-located inexpensive housing stock applies in cities across the world.
Similarly, the authors devote a chapter to work in the Cully neighborhood in Portland, Oregon, where community leaders have instituted a raft of urban environmental improvements while creating and preserving more affordable housing. The idea in the Cully area, as in all these cases, is to make places more resistant to climate change while enhancing them as good places to live for those already there.
“Climate adaptation is going to mobilize enormous public and private resources to reshape cities across the globe,” Lamb notes. “These cases suggest pathways where those resources can make cities both more resilient in the face of climate change and more equitable. In fact, these projects show how making cities more equitable can be part of making them more resilient.”
Other scholars have praised the book. Eric Klinenberg, director of New York University’s Institute for Public Knowledge has called it “at once scholarly, constructive, and uplifting, a reminder that better, more just cities remain within our reach.”
Vale also teaches some of the book’s concepts in his classes, finding that MIT students, wherever they are from, enjoy the idea of thinking creatively about climate resilience.
“At MIT, students want to find ways of applying technical skills to urgent global challenges,” Vale says. “I do think there are many opportunities, especially at a time of climate crisis. We try to highlight some of the solutions that are out there. Give us an opportunity, and we’ll show you what a place can be.”
How good old mud can lower building costs
Buildings cost a lot these days. But when concrete buildings are being constructed, there’s another material that can make them less expensive: mud.
MIT researchers have developed a method to use lightly treated mud, including soil from a building site, as the “formwork” molds into which concrete is poured. The technique deploys 3D printing and can replace the more costly method of building elaborate wood formworks for concrete construction.
“What we’ve demonstrated is that we can essentially take the ground we’re standing on, or waste soil from a construction site, and transform it into accurate, highly complex, and flexible formwork for customized concrete structures,” says Sandy Curth, a PhD candidate in MIT’s Department of Architecture who has helped spearhead the project.
The approach could help concrete-based construction take place more quickly and efficiently. It could also reduce costs and carbon emissions.
“It has the potential for immediate impact and doesn’t require changing the nature of the construction industry,” says Curth, who doubles as director of the Programmable Mud Initiative.
Curth has co-authored multiple papers about the method, most recently, “EarthWorks: Zero waste 3D printed earthen formwork for shape-optimized, reinforced concrete construction,” published in the journal Construction and Building Materials. Curth wrote that paper with nine co-authors, including Natalie Pearl, Emily Wissemann, Tim Cousin, Latifa Alkhayat, Vincent Jackow, Keith Lee, and Oliver Moldow, all MIT students; and Mohamed Ismail of the University of Virginia.
The paper’s final two co-authors are Lawrence Sass, professor and chair of the Computation Group in MIT’s Department of Architecture, and Caitlin Mueller, an associate professor at MIT in the Department of Architecture and the Department of Civil and Environmental Engineering. Sass is Curth’s graduate advisor.
Building a structure once, not twice
Constructing wooden formwork for a building is costly and time-consuming. There is saying in the industry that concrete structures have to be built twice — once through the wooden formwork, then again in the concrete poured into the forms.
Using soil for the formwork could change that process. While it might seem like an unusual material compared to the solidity of wooden formwork, soil is firm enough to handle poured concrete. The EarthWorks method, as its known, introduces some additive materials, such as straw, and a wax-like coating for the soil material to prevent any water from draining out of the concrete. Using large-scale 3D printing, the researchers can take soil from a construction site and print it into a custom-designed formwork shape.
“What we’ve done is make a system where we are using what is largely straightforward, large-scale 3D printing technology, and making it highly functional for the material,” Curth says. “We found a way to make formwork that is infinitely recyclable. It’s just dirt.”
Beyond cost and ease of acquiring the materials, the method offers at least two other interrelated advantages. One is environmental: Concrete construction accounts for as much as 8 percent of global carbon emissions, and this approach supports substantial emissions reductions, both through the formwork material itself and the ease of shaping the resulting concrete to only use what is structurally required. Using a method called shape optimization, developed for reinforced concrete in previous research by Ismail and Mueller, it is possible to reduce the carbon emissions of concrete structural frames by more than 50 percent.
“The EarthWorks technique brings these complex, optimized structures much closer to built reality by offering a low-cost, low-carbon fabrication technique for formwork that can be deployed anywhere in the world,” Mueller says.
“It’s an enabling technology to make reinforced concrete buildings much, much more materially efficient, which has a direct impact on global carbon emissions,” Curth adds.
More generally, the EarthWorks method allows architects and engineers to create customized concrete shapes more easily, due to the flexibility of the formwork material. It is easier to cast concrete in an unusual shape when molding it with soil, not wood.
“What’s cool here is we’re able to make shape-optimized building elements for the same amount of time and energy it would take to make rectilinear building elements,” Curth says.
Group project
As Curth notes, the projects developed by the Programmable Mud group are highly collaborative. He emphasizes the roles played by both Sass, a leader in using computation to help develop low-cost housing, and Mueller, whose work also deploys new computational methods to assess innovative structural ideas in architecture.
“Concrete is a wonderful material when it is used thoughtfully and efficiently, which is inherently connected to how it is shaped,” Mueller says. “However, the minimal forms that emerge from optimization are at odds with conventional construction logics. It is very exciting to advance a technique that subverts this supposed tradeoff, showing that performance-driven complexity can be achieved with low carbon emissions and low cost.”
While finishing his doctorate at MIT, Curth has also founded a firm, FORMA Systems, through which he hopes to take the EarthWorks method into the construction industry. Using this approach does mean builders would need to have a large 3D printer on-site. However, they would also save significantly on materials costs, he says.
Further in the future, Curth envisions a time when the method could be used not just for formworks, but to construct templates for, say, two-story residential building made entirely out of earth. Of course, some parts of the world, including the U.S., extensively use adobe architecture already, but the idea here would be to systematize the production of such homes and make them inexpensive in the process.
In either case, Curth says, as formwork for concrete or by itself, we now have new ways to apply soil to construction.
“People have built with earth for as long as we’ve had buildings, but given contemporary demands for urban concrete buildings, this approach basically decouples cost from complexity,” Curth says. “I guarantee you we can start to make higher-performance buildings for less money.”
The project was supported by the Sidara Urban Research Seed Fund administered by MIT’s Leventhal Center for Advanced Urbanism.