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A personal account of the final act in the fight to pass the United States’ first comprehensive climate law

One year ago, the Inflation Reduction Act became law, throwing the full financial might of the federal government behind the clean energy transition and forever changing the fight against climate change.
Recent polling finds that too few recognize the historical significance of the hundreds of billions of dollars the law invests to make clean energy cheaper for American households, businesses, and industries.
Even fewer people appreciate just how close we came to losing it all.
This is a personal account of the final days of the fight to pass the nation’s first comprehensive climate law, and of how the Inflation Reduction Act remarkably arose from the ashes of near-defeat.
On July 14, 2022, just over a month before eventually becoming law, the budget bill that would eventually become known as the Inflation Reduction Act died. Again.
That evening, Senator Joe Manchin, the coal-state Democrat from West Virginia, called Senate Majority Leader Chuck Schumer to tell him he was done with the long-simmering inter-party negotiations striving to craft a budget bill that could unite all 50 Democratic senators and pass the evenly divided Senate. The stubborn hold-out had already dashed progressive dreams multiple times in the year and a half since the 117th Congress gaveled into session, including dealing the killing blow to the House-passed Build Back Better Act in December 2021.
The news was a shock. Less than two weeks earlier, over the Fourth of July weekend, I was told by Senate staffers party to the budget negotiations that a deal was imminent. They told me to prepare the REPEAT Project, a Princeton University team that I lead and that assesses the impacts of federal energy and climate policies as they are debated, to stand by to run the numbers on a new bill.
But in July 2022, inflation was running at nearly 9% and gasoline prices were over $5 per gallon in many parts of the U.S. Then we got one bad report on the rate of inflation after another, prompting Manchin to say he could no longer support any additional government spending that might further fuel inflation.
Manchin called Schumer on July 14 to say he could no longer continue negotiations, and that he would not support legislation that included any clean energy or climate spending — leaving only a slimmed-down bill focused on health care left in play.
"DEVASTATING... utterly SENSELESS!" I tweeted at the time, using REPEAT Project modeling to illustrate the massive climate gap we would have faced, had that been the end of the story.

And it really did seem like the end.
The tone I heard from Senate staffers that day was very different from the several prior ‘false demises’ of the budget negotiations we had all endured. They were despondent. “I feel like I just wasted the last six years of my life,” one staffer texted me on July 14. So did I.
The next day, Manchin issued an ultimatum: Either Democrats could quickly pass a “skinny” budget bill focused only on health care or they could wait a few weeks to see if inflation improved and try negotiating a larger package in August.
The problem: Basically no one thought inflation would meaningfully cool that quickly, and there was only a few weeks left to pass a law before the August recess, after which Congress would go into full campaign season and nothing would pass.
The game clock was winding down.
Then President Biden threw in the towel. He issued an official statement vowing to keep the climate fight up via executive action but urged the Senate to quickly pass a bill focused only on health care.
Schumer appeared poised to do just that, and a caucus meeting for Senate Democrats was set for the following Tuesday to discuss how to move forward. Since Congress only gets one shot at a budget reconciliation law per fiscal year, if they ended up passing a bill without any climate package, it was game over.
I had been working to advance federal climate policy since 2008. I lived through the demise of the last serious effort to pass a federal climate law in 2009 and 2010. I knew how rare these windows of opportunity to pass meaningful legislation are. And we’d just blown a once-in-a-decade chance. Would we have to wait until the 2030s for our next shot? Could we even survive another decade with the United States standing on the sidelines of the global climate fight?
By July 16, I had apparently had enough time to go through the various stages of grief, arriving at bargaining (or perhaps denial). “It’s just not okay to end like this, with Manchin walking away from the deal and the rest of the caucus just quietly accepting that!” I wrote in a text to a key Senate staffer. “There’s got to be at least a dozen [Senate] members who are furious and could be unwilling to accept that in the end, right?”
“Working on it 😄,” the staffer replied.
And just like that, while many gave up and others fumed, staff from just a handful of Senate offices and a rag-tag group of allied individuals and advocacy groups got back to what we’d been doing since the start: doggedly working the problem to find some way to passage.
Even then, I had very little faith our efforts would succeed. I just knew that the game clock had a few seconds left on it, time enough to run a couple more Hail Mary plays, and I wanted to be able to look my kids in the eye some day and say, “We failed, but we truly tried everything we could.”
So we got back to work.
So how did we get Manchin back to the negotiating table?
From my limited perspective, three things worked.
First, the concern that climate spending would stoke inflation was bogus. The budget deal under negotiation was doubly paid for, raising twice as much new revenue as it spent. What’s more, the spending plan was estimated to be in the ballpark to $30 to $50 billion per year spread over a decade, or less than 1% of our roughly six trillion dollar federal budget.
The climate spending was peanuts, and any honest macroeconomist would say that the budget deal would have a mild, fiscally contractionary effect at best or no effect on inflation at worst. Plus, the proposals specifically took aim at two key drivers of inflation: health care costs and energy costs.
Either Manchin was honest in his inflation fears but misappreciating the issues, or he was trying to give himself cover to scuttle the bill.
Our so-called “Never Give Up Caucus” took him at face value. To address his inflation concerns, allies succeeded in getting inflation-hawk-in-chief Larry Summers, the conservative leaning Penn-Wharton Budget Model team, and the deficit hawkish head of the Committee for a Responsible Federal Budget to tell Manchin (and the press) that the deal would cut the deficit and not raise prices.
Second, the many vested interests that stood to gain from the clean energy package were mobilized and pushed Manchin hard not to leave them high and dry.
This was always a key part of the political strategy of the clean energy package: rather than focus on pricing carbon emissions and making fossil energy more expensive (as Congress had attempted in 2009), the budget bill would instead provide a wide-ranging set of direct subsidies — tax credits, grants, loan programs — to make climate-friendly technologies cheaper and help build up manufacturing of clean energy components in the U.S. Concentrated beneficiaries create organized power to back the bill. That was the theory, and it was time to put it to the test.
The pressure campaign to get Manchin back to the table was “across the board,” according to National Wildlife Federation CEO Collin O’Mara, who was one of the most dogged and effective organizers during those pivotal final days.
Executives from renewable energy companies reminded Manchin that billions of dollars of investment were at stake.
The United Mine Workers of America pushed Manchin not to walk away from his promise to create a permanent trust fund for miners suffering from black lung disease, which the budget bill would do.
In my personal estimation, the most effective voices were probably from those sectors Manchin had styled himself as personally championing as chairman of the Senate Energy Committee: carbon capture, nuclear power, hydrogen, and advanced manufacturing.
A senior executive with a utility operating in Appalachia reportedly told Manchin: “We know coal plants are ultimately going to close. What is going to replace them? What are the jobs? What are we transitioning to? In this case, we are going to explore hydrogen, new nuclear and get manufacturing in the state.”
Manchin received incoming pressure to pass a bill from the Carbon Capture Coalition, oil companies like BP with big plans to invest in hydrogen, and Nucor, the nation’s largest steel maker, which planned new investments in West Virginia in part to supply growing demand for steel for burgeoning renewable energy industries.
Utilities like Constellation and Duke reminded Manchin that this law was our best shot at preserving the nation’s existing nuclear fleet, which provides about a fifth of our electricity without contributing to air pollution or climate change.
Bill Gates, who has invested in nuclear and energy storage startups, called Manchin personally. And executives at a Gates-backed battery company with plans for a West Virginia manufacturing hub explained to Manchin’s staff how the bill’s incentives would accelerate their growth trajectory.
Third, a few key senators that Manchin personally trusted or respected, including John Hickenlooper of Colorado, Chris Coons of Delaware, Tina Smith of Minnesota, Mark Warner of Virginia, and Ron Wyden of Oregon, reportedly pressed him with direct personal appeals.
I imagine their pitches either made the political case — did Manchin really want to send his party into the midterms having utterly failed on their domestic policy agenda? — or a personal one, emphasizing the opportunity to secure his legacy and the admiration of his grandchildren.
I don’t think we should discount the importance of these personal appeals. At the end of the day, senators are humans too. They crave the respect of their colleagues (at least those they admire). And everyone wants to be the hero of their own story, not the villain.
Which of these (or other parallel efforts I don't know about) pushed Manchin back to the table? Who knows what went through his mind in the end. But somehow, against virtually all expectations, it worked.
We didn’t know it until later, but by as early as Tuesday, July 19, Manchin and Schumer, with just a couple key aids each, began meeting in secret somewhere in the Senate offices and got back to work.
No one else had any idea this was happening.
Like others working to save the bill, I spent the next week continuing to talk to press, allies, congressional staff, etc., marshaling talking points and data, mobilizing various interests to pressure Manchin, and doing everything we could to convince the stubborn senator to make a deal that would get a climate package into law. Little did we know, he was already back at it.
In fact, a little over a week later, on Wednesday, July 27, Manchin issued a statement that shocked everyone: He and Leader Schumer had reached a deal after all and were unveiling a full-fledged bill to be called “The Inflation Reduction Act.”
“The Inflation Reduction Act of 2022 addresses our nation’s energy and climate crisis by adopting commonsense solutions through strategic and historic investments that allow us to decarbonize while ensuring American energy is affordable, reliable, clean and secure,” Manchin wrote.
The full text of the bill dropped later that evening, and we were blown away to see how much of the original climate package from the ill-fated Build Back Better Act was retained by this new legislation.
The deal contained roughly $370 billion in estimated climate and clean energy spending, an historic package. All the key tax incentives were still in the proposal, including credits for clean electricity, electric vehicles, and heat pumps. Major grant programs were funded at similar levels. Even a new fee on methane pollution from the oil and gas sector had survived. In fact, a tax credit for U.S. clean energy manufacturing had even been expanded, apparently at Manchin’s request, to support production of batteries and their components and the mining and processing of critical minerals.
Rather than lose it all, we were poised to win nearly everything we’d hoped for.
“Holy shit. Stunned, but in a good way,” wrote Senator Tina Smith, a tireless advocate for the climate package, on Twitter. “$370B for climate and energy … BFD.”
It took us a couple weeks to run the numbers, but once we did, REPEAT Project estimated on August 4 that the Inflation Reduction Act, or IRA (pronounce it like your friendly Uncle Ira!), would cut emissions by about one billion metric tons per year in 2030 and retained about 80% of the cumulative emissions reductions of the larger Build Back Better package.

IRA could get the United States to about 42% below our peak historical emissions by 2030, we estimated at the time. (REPEAT Project’s latest updated analysis published last month revises 2030 emissions under IRA to 37-41% below peak.) That was still short of the target of 50% below peak levels that President Biden had committed the country to on the world stage, but the proposed legislation was a true game changer that gave us a fighting chance to hit that goal.
After the Manchin-Schumer deal dropped, we were off to the races.
Manchin shifted from the package’s chief obstacle to its chief spokesperson, stumping for the bill on Fox and haranguing senators on the floor alongside Schumer to get IRA passed during an exhausting, overnight “vote-a-rama.” After a 16-hour process where Republicans proposed amendment after amendment to be shot down one by one by a united Democratic caucus — plus a little last minute drama wherein Kyrsten Sinema nearly killed the bill to save private equity firms billions in taxes — the Inflation Reduction Act passed the Senate at 3:17 PM on August 7, 51-50, with Vice President Harris casting the deciding vote.
The House passed IRA in turn on August 14, and President Biden signed it into law two days later. The rest, as they say, is history.
We’re still writing that history, but it’ll be forever changed by passage of the landmark law. And we almost lost it all.
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BAAJA would likely help speed up the U.S. transmission buildout, but there’s a chance we’re undercounting the benefits.
This is Heatmap Daily, a weekday digest written by our executive editor. Subscribe here.
As you may have seen, my colleague Emily Pontecorvo and I got the first look at the Rhodium Group’s analysis of what the bipartisan permitting bill will do to emissions.
You can read our story at Heatmap. The upshot is that the bill’s most significant provisions are likely neutral for climate change in a worst-case scenario — and could, in more optimistic scenarios, help reduce emissions. (Those scenarios aren’t about how the bill will be interpreted, to be clear, but about what might happen in the broader energy economy — with economic growth, for instance, or oil prices — that will feed back into the emissions math.)
I won’t give away much more about our story, but there is one irony I want to note about the Rhodium study and the broader morass of American electricity policy. One of the Rhodium study’s big findings is that BAAJA will help expand the transmission system. Power lines are essential for decarbonization because they move electricity from the country’s sunniest and windiest places to its cities, towns, and suburbs.
BAAJA will help transmission both because the law affirmatively expands the power grid and because the bill’s changes to environmental review law could help power lines. Today, for instance, it takes twice as long on average to conduct a federal environmental impact study for transmission lines as it does for pipelines, according to Rhodium data. All in all, the Rhodium analysis estimates BAAJA could increase the amount of new transmission capacity added per year by 167% to 262% nationwide, compared to the average rate over the past decade.
Which is very interesting. But it’s worth noting that the Rhodium analysis may — emphasis on may — undercount the bill’s transmission benefits. This is because the Rhodium authors did not have time to conduct a full network study of the U.S. transmission system, which would take into effect the grid’s physical footprint, power flows, and existing bottlenecks. Instead, they looked at power supply and demand within the context of the broader U.S. energy system.
That’s a reasonable decision; indeed, it was probably the only decision they could make. Because of how energy system models work, a more fulsome analysis might have taken weeks to complete, not to mention a very large amount of money and computational power. When the National Renewable Energy Lab studied how quickly Los Angeles could switch to 100% renewable energy earlier this decade, for instance, it ran such a study, modeling every transmission line and substation in LA. Its supercomputer wound up churning through more than 100 million simulations; the research effort took three years. If the Rhodium analysts had done even a fraction as much work to examine what BAAJA would mean for the country’s power grid, then they would have of course finished their analysis well after the window to vote on BAAJA would have closed.
One of the ironies here is that while the LA 100 study was particularly exhaustive, we actually require clean energy projects to conduct similar studies all the time. Right now, one of the primary reasons it takes so long to hook up a new power plant to the grid is that it has to undergo an interconnection study in many parts of the country. In those regions, a new solar farm or battery project can’t connect to the grid until operators study its effect on grid congestion everywhere else.
As it happens, BAAJA aims to fix this process, allowing power plants to join the grid in batches.
I want to note the irony that a process we mandate for the power sector is actually too slow to deliver speedy policy analysis to legislators. If Rhodium had tried to study BAAJA the way we make power plants study the grid, then it never would have delivered its verdict in time. If you think Congress is slow, in other words, you should meet the electricity sector.
Current conditions: The Pineapple Express, an atmospheric river originating in the Pacific near Hawaii, is arriving in the Southwest laden with heavy rain that’s set to flood the region • Indonesia has the worst air quality in the world as forest fires rage along Sumatra’s southern coast • A cross-country storm will soak much of the United States on Tuesday’s Election Day.
The Senate’s grand compromise to simplify federal permitting on energy projects would likely drop emissions slightly as the benefits to accelerating deployments of clean energy infrastructure outweigh the boost the legislation could give to fossil fuels. Even under the worst-case scenario, emissions remain on the same trajectory as today. That’s according to a hotly anticipated new analysis by the Rhodium Group, the consultancy whose U.S. emissions estimates are among the most widely cited in American politics. The report, shared first with my colleague Emily Pontecorvo, found that provisions in the Bipartisan American Affordability and Jobs Act largely counteract each other on climate. The bill makes building transmission lines much easier, a key step to patching more renewables onto the grid. But it also makes new gas pipelines simpler to permit, clearing the way for a buildout of the infrastructure for the fossil fuel already dominating U.S. electricity and heating systems. Still, under the best-case scenario, the legislation could cut U.S. economy-wide emissions by 5% below where they would otherwise go in 2040. The bill could also slash energy bills by $78 per year and support construction of more than 200 gigawatts of clean energy capacity, as compared to a world where it didn’t pass. The Rhodium report is at least the second analysis yet to find that the bill could modestly lower emissions. The first, as I reported last week, came from the think tank Resources for the Future, which saw a slight drop in power-sector emissions relative to a world without BAAJA.
If overhauling national permitting rules to make building green energy infrastructure easier doesn’t work to lower emissions, traditional negotiations in favor of regulations that can deliver cuts looks no more promising. Two weeks of United Nations-led talks in Armenia ended Saturday without a settled approach to meeting 2030 deadlines for preserving more nature. “We don’t need to spend more to close the biodiversity funding gap, we need to spend better,” Marina Von Weissenberg, a Finnish senior ministerial advisor, said in a statement. “Governments have a real opportunity here to reshape public spending with future generations in mind, but they can’t do it alone. International coordination is key to giving governments the confidence to lead change.”
Last week, my colleague Katie Brigham published a detailed feature highlighting China’s tightening grip over the global supply chain for electrolyzers, the technology that zaps water with electricity to separate the molecule’s hydrogen from its oxygen and harvest the former as fuel. Keen readers of this newsletter recognize the story. Even before the Iran War, China had beefed up its public support for green hydrogen and related technologies. After the conflict constricted the flow of oil through the Strait of Hormuz, the People’s Republic redoubled its efforts. Quite literally. New data from the National Energy Administration shows that investments into the hydrogen industry doubled in the first nine months of this year, according to Hydrogen Insight.
Fermi America went public in a gangbusters initial public offering last year as the company, with a board of directors including former Texas governor and U.S. Secretary of Energy Rick Perry, pledged to build the world’s largest data center and power the facility with gas and four large-scale Westinghouse AP1000 nuclear reactors. In April, the chief executive and chief financial officer quit. The board room drama continued into the next month. The company’s stock recovered somewhat over the summer as investors bet on a turnaround pegged to a series of deals with companies looking to lease space on its future servers. But fresh chaos enveloped the startup Friday when The Texas Tribune reported that Perry had failed to earn enough support from the board of directors to win reelection to his seat.
In a statement posted to X on Friday evening, Fermi said that neither Perry nor investor Jeffrey Stein had been removed from the company’s board. “In fact, both Governor Perry and Jeffrey Stein received a majority of the votes cast by shareholders,” the statement read. “Let’s be clear: Governor Perry and Mr. Stein remain members of Fermi’s Board of Directors and will continue serving until their successors are duly elected. Both remain eligible for reelection.”
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If you thought the fine particulate matter from last year’s catastrophic Los Angeles firestorm was bad, you weren’t thinking imaginatively enough about just how dangerous all that airborne material could be. A new study published in the journal Science Advances suggests that upward of 7 million people were exposed to high levels of airborne lead and other toxic metals released when homes and vehicles caught flame. The January 2025 Eaton inferno that destroyed more than 9,400 buildings and killed 19 people spewed 80 times the normal concentration of lead found in the atmosphere through a plume that settled over 70% of the Los Angeles metropolitan area. “I can envision that in the future we have these evacuation zones for smoke exposure as well,” Haroula Baliaka, the study’s lead author, who was a PhD candidate at Caltech last year, told Bloomberg. “Unfortunately, this is not a one-time event. It’s a new reality and we need to adapt to it and we need to do it sooner rather than later.”
The findings come a week after a study published in JAMA Pediatrics showed a link between wildfire smoke exposure during pregnancy and autism diagnoses in children. The research from Rutgers University examined 893,212 mother-child pairs enrolled in Medicaid, with children born between 2007 and 2014. Each increase of 0.75 micrograms per cubic meter in average concentrations of wildfire-related air pollution during pregnancy was associated with a 30% higher risk of a subsequent autism diagnosis. Exposure in the second and third trimesters had the highest risk. “Wildfire smoke can travel far beyond the communities where fires are burning, and exposure may occur even when smoke is not visible,” Stefania Papatheodorou, an epidemiologist at the Rutgers School of Public Health and lead author of the study, said in a press release. “Our findings highlight the importance of awareness of wildfire events and their potential effects on air quality during pregnancy.”
The United Kingdom is building out more than 10 gigawatts of offshore wind as London looks to shore up its electricity supplies amid the global energy shock. But Chancellor of the Exchequer John Healey said he would veto any offshore wind projects that don’t lower bills. While clean power is “how we break the grip of international gas prices on our bills,” he said the infrastructure “has to come at the right pace, in the right places, with the grid to carry it.” The statement fueled what The Guardian called “concerns that the government is moving away from the pro-renewables agenda.”
Meanwhile, the U.S. midterms aren’t the only election this week. In Sunday’s runoff election, Bulgaria’s pro-Russian acting President Iliana Iotova appeared to eke out a victory over the former prime minister Andrei Gyurov, a pro-Western banker. Her win unites the government with her close ally, Prime Minister Rumen Radev, ensuring stronger support for the leader’s two signature energy policies. One, a plan to build a pair of Westinghouse AP1000s at the Kozloduy nuclear plant, is scheduled to advance to the next planning stage next year. The other, the easing of sanctions on Russian uranium to ensure a supply of fuel for the plant’s existing reactors, looks likely to continue under Iotova’s friendly diplomacy with the Kremlin.
William Nordhaus, the pioneering Yale University economist who won the Nobel Prize in 2018 for integrating climate change into macroeconomic analysis, has died at 85 following a battle with an aggressive form of brain cancer. His nephew, Ted Nordhaus of the Breakthrough Institute, referred to his father, Robert Nordhaus, as “the original environmental lawyer and Bill as the original environmental economist,” he wrote in a blog post after his uncle’s passing. “It is safe to say that the Nordhaus brothers were doing environmental law and economics, respectively, long before either label existed. Not bad for two kids who grew up in the intellectual hotbed of Albuquerque, New Mexico, population 40,000, during and after the second world war.” Their legacies are something of the Nordhaus family brand: Pragmatism. May his memory be a blessing.
Even in the worst-case scenario, BAAJA wouldn’t increase emissions, an analysis by the Rhodium Group concludes.
The bipartisan permitting reform bill is likely to slightly cut greenhouse gas emissions and lower electricity bills by 2040 — or at worst leave emissions on the same trajectory that they are on today — as compared to the status quo, according to a new analysis of many of its provisions by the Rhodium Group, an independent research firm.
The analysis examines the policies in the Bipartisan American Affordability and Jobs Act, or BAAJA, that would have the most-clear cut effects on climate pollution and the energy system. It is the most comprehensive account of the bill’s effects on emissions so far, although it does not examine all of its provisions.
The bill is hard to analyze because — unlike recent partisan energy bills, such as the Inflation Reduction Act or President Trump’s tax and spending bill — its effects on the climate are more ambiguous and often seem to counteract each other. BAAJA will make it easier to build not only long-distance transmission lines, which are essential for clean energy, but also natural gas pipelines, which can expand fossil fuel production.
Yet the climate benefits likely outweigh or balance out the harms, at least among the studied policies, the report finds. In the best case scenario, the bill could cut U.S. economy-wide emissions by 4%, reduce energy bills by $78 per year, and drive more than 200 gigawatts of new clean energy capacity by 2040, compared to status quo policy. In a worst case scenario, greenhouse gas emissions would remain unchanged on their current trajectory.
The results should be viewed as more directionally instructive than a precise accounting of the legislation, Ben King, an energy and climate director at Rhodium, told me.
“We don’t see emissions increasing because of the bill,” King said. “This bill should drive some emission reductions, it should drive some more clean energy on the grid, and it should drive electricity bills down. And given the complexity of the bill, that’s what we can say at this point.”
The analysis does not look at the bill’s permitting certainty provisions, which Democrats initially sought to stop President Trump’s war on wind but have become one of its thorniest sections. Rhodium’s modeling is also a crude tool for assessing transmission policy, since the model can look only at economic inputs such as supply and demand, and not the physical reality of the U.S. grid, such as where transmission lines run or where the bottlenecks are.
It is the second analysis to find that the bill could modestly lower carbon pollution. A more limited report focusing only on the power grid, published last week by the think tank Resources for the Future, found the legislation could cut electricity emissions by 6% while reducing electricity system costs by $350 billion through 2050.
The effects of the bill may sound small, but BAAJA is not a climate bill. It’s not engineered to reduce reliance on fossil fuels or boost clean energy technologies. Its overarching purpose is to address various federal bottlenecks that bog down America’s ability to build stuff, whether that’s a pipeline or a highway or a power line or a solar farm. So it’s not entirely surprising that it’s not expected to have a dramatic effect on emissions.
The reason it’s a priority for Senate climate champions is that many of its provisions are important precursors to decarbonizing the U.S. economy more quickly. By enabling faster expansion of the power grid, the bill would put the country in a much better position to transition to clean energy. After Joe Biden’s big climate bill, the Inflation Reduction Act, passed in 2022, Princeton University researchers found that the country’s slow buildout of transmission lines would be a major obstacle to gleaning the law’s benefits. Unless the country more than doubled the rate of transmission expansion, they wrote, more than 80% of the IRA’s emission reduction potential by 2030 would be lost.
BAAJA could nearly triple the build rate of high-voltage transmission, the Rhodium Group found, from an average of about 0.7 terawatt-miles added per year over the past decade to an average annual pace of 1.9 to 2.6 terawatt-miles through 2040. Because Republicans and President Trump have repealed so many of the IRA’s provisions, this won’t drive as much clean energy as the Princeton researchers expected, but Rhodium estimates that by 2040, BAAJA would help between 17 and 249 gigawatts of clean resources get built compared to a world without it.
The growing grid is the main reason why the bill cuts energy costs, because it enables more lower-cost resources to connect to the grid. The bill’s requirement that data centers pay the full cost of connecting to the grid also puts downward pressure on electricity rates.
“If your goal is to do climate policy in the future, this is an important down payment to making progress there,” King said.
The authors studied the bill’s provisions under a range of economic assumptions, including a “best case” scenario in which clean energy gets cheaper and easily outcompetes natural gas, and a “worst case” scenario where natural gas prices collapse and the inexpensive fuel keeps dominating the U.S. energy system.

The authors limited their analysis to the bill’s provisions that speed up transmission line and natural gas pipeline permitting. They assumed that when you make it easier to approve transmission lines, the lines get cheaper to build and get built more quickly. The same goes for gas pipelines. Then they looked at how the energy system would respond. Would we build more power plants? Would there be more natural gas production? Where will that gas go?
The caveats, aside from omitting the bill’s “project certainty” provisions, are that they did not account for policies that support geothermal energy, virtual power plants, advanced transmission technologies, or the ways in which the bill would reduce congestion on the grid — all of which could result in fewer emissions. At the same time, the modeling assumes that all of the data centers that get built between now and 2040 connect to the grid, even though today, many data centers are planning to run on inefficient off-grid natural gas plants. That means this modeling likely underestimates emissions from data centers. (Although the authors did a separate exercise that went deeper into data centers, which I’ll explain shortly.)
The report also limited its analysis to the United States. While the modeling found that liquified natural gas exports would increase by 8% to 15% under BAAJA, the authors did not account for how those exports could affect the energy mix or emissions in the rest of the world.
They found that the bill’s changes to the Clean Water Act and the National Environmental Policy Act would enable more gas pipeline development, which, in isolation, would increase emissions relative to a world without BAAJA. More pipelines means more production of oil and natural gas, which means higher methane and CO2 emissions throughout the fossil supply chain. Under a worst case scenario, they estimate a 4% increase in the amount of new gas capacity, although gas-fired generation as a whole increases by less than 1% in 2040. Even then, emissions would simply be flat compared to current expectations.
“On net, the emissions increases that we see there are outweighed by the emissions benefits that come from the transmission provisions of the bill,” King said.
The report also studied how BAAJA might affect data center emissions. Its “base case” scenario — which includes all the analysis I’ve shared with you so far — assumes data centers will make up about 17% of electricity demand by 2040. That figure already supposes huge growth in data center energy consumption, because data centers only use about 5% of U.S. electricity today.
But what if data center demand grows even faster than that? The authors modeled two additional scenarios to see what would happen if data center electricity demand instead accounted for more than a quarter of U.S. electricity demand in 2040.
While BAAJA would make it easier for data centers to connect to the grid, it also includes ratepayer protection provisions that would make it more expensive to do so — roughly 10% more for a 1 gigawatt data center, Rhodium estimates. Determining whether that will drive developers on-grid or off-grid was beyond the scope of the analysis, so the modelers looked at the two extremes — a world where all additional data center demand hooks up to the grid and one where none of it does.
For the on-grid scenario, whether or not that additional demand is met with mostly gas plants or cleaner sources largely depends on the price of fossil versus clean generation. But even if most of the demand was met by natural gas plants on the grid, emissions would still be 30% lower than if it was met by natural gas plants off the grid, Rhodium found.
Editor’s note: This article originally misstated the scope and timing of electricity systems savings in the Resources for the Future study. It has been corrected in this version.