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Now back at the University of Pennsylvania, she talks to Heatmap about community engagement, gaps in the decarbonization market, and goats.

In November of 2020, Jennifer Wilcox had just moved to Philadelphia and was preparing to start a new chapter in her career as a tenured “Presidential Distinguished Professor” at the University of Pennsylvania. Then she got the call: Wilcox was asked to join the incoming Biden administration as the principal deputy assistant secretary for the Office of Fossil Energy, a division of the Department of Energy.
Wilcox had never even heard of the Office of Fossil Energy and was somewhat uneasy about the title. A chemical engineer by training, Wilcox had dedicated her work to climate solutions. She was widely known for having written the first textbook on carbon capture, published in 2012, and for her trailblazing research into removing carbon dioxide from the atmosphere. With Penn’s blessing, she decided to take the job. And in the just over three years she was in office, she may have altered the course of U.S. climate action forever.
First, Wilcox led a total transformation of the department to align it with the Biden administration’s climate goals. She started by arranging 15-minute meetings with each of the nearly 150 employees who worked with her at the D.C. office to understand their perspectives on their work, whether they were happy, and their fears and challenges. She admits she can be intense.
“I took all that information, and I sat on it with many weekends and a blank piece of paper and a pencil and drew crazy diagrams,” she told me, trying to funnel everyone’s feedback into a new vision for the department.
Previously, the Office of Fossil Energy’s primary function was to support research into oil, gas, and coal extraction and use. Wilcox flipped the mission on its head, reorganizing the department into one that would support research, development, and deployment of solutions that reduced dependency on those resources and minimized their environmental impacts. By July, she had codified that mission in a new name — the Office of Fossil Energy and Carbon Management.
Wilcox maxed out her leave this spring. I caught up with her about a week after she left the DOE, as she was picking up where she left off — preparing for her first semester as a professor of chemical engineering and energy policy at Penn. She’s also starting a new side gig as chief scientist at Isometric, a carbon credit certification company that’s trying to improve trust in carbon removal measurement and verification through rigorous standards and transparency.
I asked her to reflect on her time at the Department of Energy, the changes she oversaw, and what she’s looking to do next. Our conversation has been edited for length and clarity.
When was your last day at DOE? Did you leave because you had an obligation to come back to Penn?
My last day was Friday, May 31, so just a week or so ago. Typically, when you’re in an academic tenured position, you can have a maximum of a two-year leave. Within the first year of my appointment at DOE, the Bipartisan Infrastructure Law went through, and then in the second year, the IRA went through — the Inflation Reduction Act. And I was like, this is big stuff. It felt like just a defining moment — in my career, but also in terms of climate legislation. And I thought, how could I possibly leave now? So I went back to Penn and I wrote, I thought, a pretty thoughtful letter of the impact that I could have if I could stay just a year and a half longer. And they said yes.
Could you share the story of how you were asked to go work for the department in the first place?
Sure, it’s pretty funny. Something that many people don’t know is we have a small farm — we had 22 acres in Massachusetts, and goats and a pig and chickens and oh my goodness. Penn was like, “We’ll move your goats, too,” and so we moved everybody. And here I am at the kitchen table amidst boxes, and the goats are outside, and I’m on my laptop, and I get this email from the Biden-Harris transition team. I was like, ain’t nobody got time for that. That’s spam. Delete! And then a couple days go by and I get another one, and I was like, come on. Is this real? And I forwarded it to my husband. He’s an ER doctor, and he’s like, “Honey, that’s real. You have to respond!” And so I sent my CV.
One of the first things you did was rename the department. How did that happen?
When I came in, it was really early days of, okay, net zero by 2050, and there was a question of, what does that mean for our office? Should this office exist in a net zero world? I knew that I was being recruited to think about reshaping, rethinking the portfolio.
We only had two R&D offices at the time. One was called Oil and Gas — we renamed that Office of Resource Sustainability. The other was literally the Office of Coal. What I decided to do was take that program and move it over. That whole office is all about, if you’re choosing to extract energy resources from the Earth, how do you do it in a way that’s minimal impact?
Now, what’s left is how you manage the pollution of how we use fossil fuels — that’s the carbon dioxide. And so we built out a whole new division on carbon removal. We teased out a whole program on hydrogen, and then we also separated out carbon conversion into its own division, and then carbon transport and storage. And so rather than one program focused on carbon, we had five, which is pretty cool. I mean, the amount that I was empowered and supported — and by the way, we got it all through without a single pushback, in nine months. So that was huge.
How would you characterize how the field changed from the time that you entered the office until now? Have research questions changed? Have policy priorities changed?
I think things are starting to change. One of the things from these last few years of having the resources that have started to become mobilized, it’s helping us to recognize where the gaps really are. When you have money to be able to put out for certain topic areas, you get to see who’s going to apply, and who applies gives you an indication of where the technology is at and how much of it’s ready.
For instance, if you look at the $3.5 billion for direct air capture hubs, we had to write the funding opportunity announcement to meet industry where they’re at. There’s only a couple of companies that are really even at a stage where they can start to think about demonstration on the tens of thousands of tons of removal, let alone a million tons per year.
Some of the gaps that we saw were, in direct air capture, making sure that there’s enough companies that are supported to be able to get us to the scale that we need to. And then for the other approaches to carbon removal, making sure that if we want these projects to be durable, in terms of carbon removed on a time scale that impacts climate, we need to figure out how to quantify the net carbon that’s removed.
And then one significant gap that we saw that we are trying to fill with this funding: When we think about corporations and net zero pledges, a lot of times the carbon removal purchasing is associated with Scope 3 emissions that companies don’t have the ability to control. These are supply chains. It could be paper, it could be fuel, food, glass, cement, steel. And so looking at that whole sector, it’s about 10 different industrial sectors that we need to figure out how to decarbonize. If we can think about decarbonizing these supply chains, it’ll take some of the pressure off of the carbon removals to counterbalance those.
The last piece that I feel like gets forgotten is, in the infrastructure law, we had $2.5 billion for building out geologic storage. That’s an issue because you can do the carbon capture, but the big question is, where are you going to put it? And can you get it from point A to point B? We have a whole program called CarbonSAFE that essentially shepherds the industry through the process, starting with characterization all the way to a class six permit from EPA. Building that capacity out means that’s one less thing that industry has to worry about as they’re looking at carbon capture.
During your time there, the department was interfacing with hundreds of researchers and startup founders who were all trying to get new projects or companies off the ground. I’m curious, what are some of the most common misunderstandings you saw from applicants?
There’s a couple of things, but one that stands out — and maybe this is because I have a background in academia — there’s a lot of technologies out there that are actually pretty far along, especially in point source capture [technologies that capture carbon from the smokestacks of industrial facilities before it enters the atmosphere]. Yet, at universities, they’re still trying to develop the next solvent or solid sorbent. It’s like, we can stop doing that.
Where the R&D comes in is actually getting data over a long period of time. How does the material behave? How can we recycle it and reuse it over and over again? How can we design it in a way that reduces NOx, SOx pollution, particulate matter, making the air cleaner? But it’s not about how do we just develop a new technology, because there’s a lot out there.
It seems like one of the hardest things the department was trying to do under your leadership was to strengthen its work on community engagement and community benefits — hard because many advocates for fenceline communities are so skeptical of the solutions you were working on. How did you navigate that tension?
Well, one thing is, I know what I don’t know, and I’m usually pretty willing to say what I’m good at and what I’m not good at. In the early days, I knew that this was going to be a challenge for our office and so I recruited a social scientist: Holly Jean Buck, she’s a professor at the University of Buffalo. We brought Holly in to help us develop some of the language around … it started off with community benefits, but some of our investments don’t always lead to benefits, so let’s be honest, right? And so what we wanted to think about is, what are the societal considerations and impacts of our investments? We ended up recruiting a few others, and now we have a team that’s focused on domestic engagement, and also communications and outreach.
What do you think it could mean for some of what you’ve accomplished and other things you’ve set in motion if Biden is not reelected?
I feel pretty good about what we’ve put in place, that it’s sustainable. The other thing about what I saw is that industry is really leaning in on doing these things. The low-carbon supply chains — a lot of glassmakers, cement facilities — are very interested in improving energy efficiency, are interested in carbon capture or using hydrogen as a heat source. And so what we have done is really looking at making sure they’re economic. All of these efforts that we’ve put in place are extremely bipartisan, and they’re essentially just supporting industry in a way such that they’re achievable because they’re economic.
Let’s talk a little bit about what’s next. Why did you want to work with Isometric? What are you going to be doing there?
When I was at DOE, from the beginning, we were looking at, you know, there’s a lot of the carbon removal portfolio where we don’t have the rigor in place to be able to determine the durability of the removals, the additionality of them, the time scale on which the carbon is actually removed, quantifying net removed. And so we started a commercialization effort, leveraging our national labs to help us to develop the framework. Isometric is working toward establishing rigorous frameworks, and I’m hoping to leverage the efforts ongoing at DOE — and with transparency, so that others may follow, which could lead to more durable removals and greater impact at the end of the day.
What about on the academic side of your career. Where do you plan to focus your research?
Some of the work that we were doing, or the team has been continuing to do while I’m at DOE, is mineralization, looking at different waste feedstocks that have alkalinity [a property that’s useful for carbon removal], like magnesium and calcium. One of the things that we’re going to focus a little bit more on is asking the question of, what else is there? You know, if there’s rare earth elements or critical minerals that could be used for clean energy technologies, EV motors, magnets for wind turbines. And so, I’m really excited about looking at these materials and seeing what value is there.
I’m also really excited about helping with the measurement and quantification of some of the more natural systems of removal, like forests. One of the new majors at Penn is artificial intelligence. I think there’s an opportunity right now to think about, how can we take data, whether it’s from drones or whether it’s from Lidar and airplanes or satellite data, bringing it together in an integrated way again, so that we have more robust databases that are also transparent.
There’s so many debates going on around carbon removal right now, and it feels like they often come down to philosophical differences. Are these debates important? Or do we just need to decide what we’re going to do and then reevaluate it later?
We’re not in a position anymore to think we can just decarbonize and not do greenhouse gas removals. We know we need to do both. And so I think that there are some kind of “no regrets” things that we can do — opportunities, as we’re scaling up both in the near term, to think about them in a coordinated way. In communities that don’t have solar today, imagine you have a direct air capture facility going in, and then they’re bringing clean energy that they’re using for direct air capture, but they’re bringing it for the first time ever to a community that wouldn’t otherwise have access.
But it really is regional. I think it’s regional in that there’s limited resources in any given region, whether it’s low-carbon energy, land, clean water, even geologic pore space. You have it in some states and not others. And so we really need to look at those resources and always prioritize decarbonizing, but recognize that it’s not necessarily one or the other.
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Whether any of them will hold up in court is now the big question.
Environmental lawyers are in for years of déjà vu as the Trump administration relitigates questions that many believed were settled by the Supreme Court nearly 20 years ago.
On Thursday, Trump rescinded the “endangerment finding,” the Environmental Protection Agency’s 2009 determination that greenhouse gas emissions from vehicles threaten Americans’ public health and welfare and should be regulated. In the short term, the move repeals existing vehicle emissions standards and prevents future administrations from replacing them. In the longer term, what matters is whether any of the administration’s justifications hold up in court.
In its final rule, the EPA abandoned its attempt to back the move using a bespoke climate science report published by the Department of Energy last year. The report was created by a working group assembled in secret by the department and made up of five scientists who have a track record of pushing back on mainstream climate science. Not only was the report widely refuted by scientists, but the assembly of the working group itself broke federal law, a judge ruled in late January.
“The science is clear that climate change is creating a risk for the public and public health, and so I think it’s significant that they realized that it creates a legal risk if they were to try to assert otherwise,” Carrie Jenks, the executive director of Harvard’s Environmental and Energy Law Program, told me.
Instead, the EPA came up with three arguments to justify its decision, each of which will no doubt have to be defended in court. The agency claims that each of them can stand alone, but that they also reinforce each other. Whether that proves to be true, of course, has yet to be determined.
Here’s what they are:
Congress never specifically told the EPA to regulate greenhouse gas emissions. If it did, maybe we would have accomplished more on climate change by now.
What happened instead was that in 1999, a coalition of environmental and solar energy groups asked the EPA to regulate emissions from cars, arguing that greenhouse gases should be considered pollutants under the federal Clean Air Act. In 2007, in a case called Massachusetts v. EPA, the Supreme Court agreed with the second part. That led the EPA to consider whether these gases posed enough of a danger to public health to warrant regulation. In 2009, it concluded they did — that’s what’s known as the endangerment finding. After reaching that finding, the EPA went ahead and developed standards to limit emissions from vehicles. It later followed that up with rules for power plants and oil and gas operations.
Now Trump’s EPA is arguing that this three-step progression — categorizing greenhouse gases as pollutants under the Clean Air Act, making a scientific finding that they endanger public health, and setting regulations — was all wrong. Instead, the agency now believes, it’s necessary to consider all three at once.
Using the EPA’s logic, the argument comes out something like this: If we consider that U.S. cars are a small sliver of global emissions, and that limiting those emissions will not materially change the trajectory of global warming or the impacts of climate change on Americans, then we must conclude that Congress did not intend for greenhouse gases to be regulated when it enacted the Clean Air Act.
“They are trying to merge it all together and say, because we can’t do that last thing in a way that we think is reasonable, we can’t do the first thing,” Jenks said.
The agency is not explicitly asking for Massachusetts v. EPA to be overturned, Jenks said. But if its current argument wins in court, that would be the effective outcome, preventing future administrations from issuing greenhouse gas standards unless Congress passed a law explicitly telling it to do so. While it's rare for the Supreme Court to reverse course, none of the five justices who were in the majority on that case remain, and the makeup of the court is now far more conservative than in 2007.
The EPA also asserted that the “major questions doctrine,” a legal principle that says federal agencies cannot set policies of major economic and political significance without explicit direction from Congress, means the EPA cannot “decide the Nation’s policy response to global climate change concerns.”
The Supreme Court has used the major questions doctrine to overturn EPA’s regulations in the past, most notably in West Virginia v. EPA, which ruled that President Obama’s Clean Power Plan failed this constitutional test. But that case was not about EPA’s authority to regulate greenhouse gases, the court solely struck down the particular approach the EPA took to those regulations. Nevertheless, the EPA now argues that any climate regulation at all would be a violation.
The EPA’s final argument is about the “futility” of vehicle emissions standards. It echoes a portion of the first justification, arguing that the point alone is enough of a reason to revoke the endangerment finding absent any other reason.
The endangerment finding had “severed the consideration of endangerment from the consideration of contribution” of emissions, the agency wrote. The Clean Air Act “instructs the EPA to regulate in furtherance of public health and welfare, not to reduce emissions regardless [of] whether such reductions have any material health and welfare impact.”
Funnily enough, to reach this conclusion, the agency had to use climate models developed by past administrations, including the EPA’s Optimization Model for reducing Emissions of GHGs from Automobiles, as well as some developed by outside scientists, such as the Finite amplitude Impulse Response climate emulator model — though it did so begrudgingly.
The agency “recognizes that there is still significant dispute regarding climate science and modeling,” it wrote. “However, the EPA is utilizing the climate modeling provided within this section to help illustrate” that zero-ing out emissions from vehicles “would not materially address the health and welfare dangers attributed to global climate change concerns in the Endangerment Finding.”
I have yet to hear back from outside experts about the EPA’s modeling here, so I can’t say what assumptions the agency made to reach this conclusion or estimate how well it will hold up to scrutiny. We’ll be talking to more legal scholars and scientists in the coming days as they digest the rule and dig into which of these arguments — if any — has a chance to prevail.
The state is poised to join a chorus of states with BYO energy policies.
With the backlash to data center development growing around the country, some states are launching a preemptive strike to shield residents from higher energy costs and environmental impacts.
A bill wending through the Washington State legislature would require data centers to pick up the tab for all of the costs associated with connecting them to the grid. It echoes laws passed in Oregon and Minnesota last year, and others currently under consideration in Florida, Georgia, Illinois, and Delaware.
Several of these bills, including Washington’s, also seek to protect state climate goals by ensuring that new or expanded data centers are powered by newly built, zero-emissions power plants. It’s a strategy that energy wonks have started referring to as BYONCE — bring your own new clean energy. Almost all of the bills also demand more transparency from data center companies about their energy and water use.
This list of state bills is by no means exhaustive. Governors in New York and Pennsylvania have declared their intent to enact similar policies this year. At least six states, including New York and Georgia, are also considering total moratoria on new data centers while regulators study the potential impacts of a computing boom.
“Potential” is a key word here. One of the main risks lawmakers are trying to circumvent is that utilities might pour money into new infrastructure to power data centers that are never built, built somewhere else, or don’t need as much energy as they initially thought.
“There’s a risk that there’s a lot of speculation driving the AI data center boom,” Emily Moore, the senior director of the climate and energy program at the nonprofit Sightline Institute, told me. “If the load growth projections — which really are projections at this point — don’t materialize, ratepayers could be stuck holding the bag for grid investments that utilities have made to serve data centers.”
Washington State, despite being in the top 10 states for data center concentration, has not exactly been a hotbed of opposition to the industry. According to Heatmap Pro data, there are no moratoria or restrictive ordinances on data centers in the state. Rural communities in Eastern Washington have also benefited enormously from hosting data centers from the earlier tech boom, using the tax revenue to fund schools, hospitals, municipal buildings, and recreation centers.
Still, concern has started to bubble up. A ProPublica report in 2024 suggested that data centers were slowing the state’s clean energy progress. It also described a contentious 2023 utility commission meeting in Grant County, which has the highest concentration of data centers in the state, where farmers and tech workers fought over rising energy costs.
But as with elsewhere in the country, it’s the eye-popping growth forecasts that are scaring people the most. Last year, the Northwest Power and Conservation Council, a group that oversees electricity planning in the region, estimated that data centers and chip fabricators could add somewhere between 1,400 megawatts and 4,500 megawatts of demand by 2030. That’s similar to saying that between one and four cities the size of Seattle will hook up to the region’s grid in the next four years.
In the face of such intimidating demand growth, Washington Governor Bob Ferguson convened a Data Center Working Group last year — made up of state officials as well as advisors from electric utilities, environmental groups, labor, and industry — to help the state formulate a game plan. After meeting for six months, the group published a report in December finding that among other things, the data center boom will challenge the state’s efforts to decarbonize its energy systems.
A supplemental opinion provided by the Washington Department of Ecology also noted that multiple data center developers had submitted proposals to use fossil fuels as their main source of power. While the state’s clean energy law requires all electricity to be carbon neutral by 2030, “very few data center developers are proposing to use clean energy to meet their energy needs over the next five years,” the department said.
The report’s top three recommendations — to maintain the integrity of Washington’s climate laws, strengthen ratepayer protections, and incentivize load flexibility and best practices for energy efficiency — are all incorporated into the bill now under discussion in the legislature. The full list was not approved by unanimous vote, however, and many of the dissenting voices are now opposing the data center bill in the legislature or asking for significant revisions.
Dan Diorio, the vice president of state policy for the Data Center Coalition, an industry trade group, warned lawmakers during a hearing on the bill that it would “significantly impact the competitiveness and viability of the Washington market,” putting jobs and tax revenue at risk. He argued that the bill inappropriately singles out data centers, when arguably any new facility with significant energy demand poses the same risks and infrastructure challenges. The onshoring of manufacturing facilities, hydrogen production, and the electrification of vehicles, buildings, and industry will have similar impacts. “It does not create a long-term durable policy to protect ratepayers from current and future sources of load growth,” he said.
Another point of contention is whether a top-down mandate from the state is necessary when utility regulators already have the authority to address the risks of growing energy demand through the ratemaking process.
Indeed, regulators all over the country are already working on it. The Smart Electric Power Alliance, a clean energy research and education nonprofit, has been tracking the special rate structures and rules that U.S. utilities have established for data centers, cryptocurrency mining facilities, and other customers with high-density energy needs, many of which are designed to protect other ratepayers from cost shifts. Its database, which was last updated in November, says that 36 such agreements have been approved by state utility regulators, mostly in the past three years, and that another 29 are proposed or pending.
Diario of the Data Center Coalition cited this trend as evidence that the Washington bill was unnecessary. “The data center industry has been an active party in many of those proceedings,” he told me in an email, and “remains committed to paying its full cost of service for the energy it uses.” (The Data Center Coalition opposed a recent utility decision in Ohio that will require data centers to pay for a minimum of 85% of their monthly energy forecast, even if they end up using less.)
One of the data center industry’s favorite counterarguments against the fear of rising electricity is that new large loads actually exert downward pressure on rates by spreading out fixed costs. Jeff Dennis, who is the executive director of the Electricity Customer Alliance and has worked for both the Department of Energy and the Federal Energy Regulatory Commission, told me this is something he worries about — that these potential benefits could be forfeited if data centers are isolated into their own ratemaking class. But, he said, we’re only in “version 1.5 or 2.0” when it comes to special rate structures for big energy users, known as large load tariffs.
“I think they’re going to continue to evolve as everybody learns more about how to integrate large loads, and as the large load customers themselves evolve in their operations,” he said.
The Washington bill passed the Appropriations Committee on Monday and now heads to the Rules Committee for review. A companion bill is moving through the state senate.
Plus more of the week’s top fights in renewable energy.
1. Kent County, Michigan — Yet another Michigan municipality has banned data centers — for the second time in just a few months.
2. Pima County, Arizona — Opposition groups submitted twice the required number of signatures in a petition to put a rezoning proposal for a $3.6 billion data center project on the ballot in November.
3. Columbus, Ohio — A bill proposed in the Ohio Senate could severely restrict renewables throughout the state.
4. Converse and Niobrara Counties, Wyoming — The Wyoming State Board of Land Commissioners last week rescinded the leases for two wind projects in Wyoming after a district court judge ruled against their approval in December.