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If you want to decarbonize concrete, it helps to understand the incredible scale of the problem.
To say that concrete poses a decarbonization challenge would be an understatement. Cement production alone is responsible for somewhere between 5 and 10% of global CO2 emissions [0], roughly two to four times more than aviation, a fact that even the construction industry is finally coming to grips with.
And yet the real problem with decarbonizing concrete isn’t the scale of its emissions, it’s the scale of concrete itself. There is simply a preposterous amount of the stuff. Contemplating concrete is like contemplating the universe — awesome, in the old God-fearing definition of the word.
Before we get into the jaw-dropping amount of concrete we produce every year, it’s worth briefly discussing how the stuff is made, and thus where its emissions come from.
Concrete is formed by mixing together cement (mostly calcium silicates), aggregates (such as sand and gravel), and water into a liquid slurry. The cement reacts with the water, forming a paste that binds the mixture into a single solid mass. Beyond concrete’s high strength and low cost, it’s these liquid beginnings that make concrete so useful. It can easily be formed into any shape and leveled with the help of gravity so you can walk on it or park a car 10 stories up on it. Essentially all modern concrete is also reinforced with steel bars, which provide tensile strength and arrest cracks.
So what about the emissions? Roughly 70-90% of the embodied carbon in concrete comes from manufacturing just the cement [1]. Partly this is because making cement is an energy-intensive process — limestone and clay are put into a kiln and heated around 2500 degrees Fahrenheit. But it’s also because the chemical reaction that turns the limestone into cement (known as calcination) releases CO₂ as a byproduct. Roughly 50-60% of cement’s carbon emissions are due to calcination [2], and thus wouldn’t be addressed by moving to less carbon-intensive electricity sources, like green hydrogen.
Now for the good stuff. Again, the most important thing to understand about concrete is the scale of its production. The world produces somewhere around 4.25 billion metric tons of cement annually (though estimates vary) [3], which works out to about 30 billion tons of concrete produced each year [4].
How much are 30 billion tons?
One way of looking at it is we produce around 4 metric tons, or just under 60 cubic feet (roughly a cube 4 feet on a side), of concrete for each person on the planet each year.
Another way of looking at it is to consider the total amount of mass, full stop, that civilization ingests each year. Estimates here vary quite a bit, but it seems to be in the neighborhood of 100 billion tons [5]. So of the total volume of material that gets extracted and used each year — including all mining, all oil drilling, all agriculture and tree harvesting — around 30% of it by mass goes toward making concrete. The amount of concrete produced each year exceeds the weight of all the biomass we use annually, and all the fossil fuels we use annually.
Total civilization annual material extraction, via Krausmann et al 2018. This is up to 2015, and has now exceeded over 90 Gt/year, with another ~8 Gt/year of recycled material.
Another way of looking at it is that the total mass of all plants on Earth is around 900 billion metric tons. So at current rates of production, it would take about 30 years to produce enough concrete to exceed all the Earth’s plant (dry) biomass.
Because humans have been producing concrete for a while, and because concrete tends to last a long time, we seem to be on the cusp of this happening. Elhacham et al 2020 estimate that total human-created mass (roughly half of which is concrete) reached the total weight of all Earth’s biomass sometime in 2020. Eyeballing their graph, concrete alone will exceed the total weight of all biomass sometime around 2040.
Anthropogenic mass vs biomass during the 20th century, via Elhacham et al 2020
In a pure mass-flow sense, human civilization is basically a machine for producing concrete and gravel (and to a lesser extent bricks and asphalt).
So civilization uses a lot of concrete. Where is it all going?
China, mostly. In recent history, China has been responsible for roughly half the world’s cement production, and by implication, concrete use [6]. The U.S., by comparison, only uses 2%, with Europe using another 5%.
Cement production by region, via Sanjuan et al 2020. Since cement production roughly tracks consumption (see here and here), we can also use this as a rough guide toward where concrete is used. Note that this gives yet another value for total global cement production of 4.65 Gt
Here’s another view from around 2010, showing what this has looked like over time (data after 2010 is a projection).
Cement consumption by region, via Altwair 2010
This gets summarized in the oft-repeated statistic that China used more cement in three years than the U.S. did in the entire 20th century.
But since China has a much larger population than the U.S., we can get a more intuitive understanding of this by looking at cement consumption per capita. Here’s per capita consumption sometime around 2015:
Per capita cement consumption by country, via Globbulk
We see that the official numbers from China make it a huge outlier in cement consumption, using around eight times as much per capita as the U.S. However, in per capita terms, some Middle Eastern countries exceed it. Saudi Arabia is higher, and Qatar, which is somewhere over 2,000 kg/capita, is so high it doesn’t even show up on the graph. It’s the combination of China’s huge population and its huge per-capita consumption that make it such an outlier in concrete production.
The official Chinese numbers are so huge, in fact, that some analysts suspect that they’re inflated, either by manipulating the data or by producing construction projects that don’t have actual demand (or both). The graph above also includes a more “realistic” estimate (which is still 3x as high as U.S. per-capita use).
What does all this concrete construction mean in practical terms? Well, China has somewhere around 50-60% of the floor space per capita as the U.S. does, or roughly as much living space per capita as most European countries [7]. This is the result of a massive trend toward urbanization over the last quarter century. Urbanization rates went from around 25% in 1990 to 60% in 2017, a period in which China’s population also increased by 250 million. In other words, in less than 30 years over 550 million moved into Chinese cities, and they all needed somewhere to live. By building enormous numbers of concrete high rises, in under 20 years China quintupled its urban residential floor space and doubled its residential floor space overall.
Residential floor space in China over time, via Pan 2020
Beyond China, we see high per capita rates of cement use in the rest of Southeast Asia, as well as the Middle East [8].
One reason you see this volume of concrete use in lower-income, urbanizing countries is that concrete construction is comparatively labor-intensive to produce. The materials for concrete are extremely cheap, and much of its cost in high-cost labor countries (such as the U.S.) is from the labor to produce it — building and setting up the formwork, laying out the reinforcing, placing the embeds, etc. If you’re a country with a lot of low-cost labor, this is a pretty good trade-off.
In addition to the current largest users of concrete, one trend to keep an eye on long-term is India’s concrete use. If India ever proceeds on a path of mass urbanization similar to China (as some folks speculate it will), we could see a massive uptick in global concrete output — India’s urbanization rate of 34% is around where China was in the late 1990s. A shift in India toward a per capita cement consumption more consistent with the rest of Southeast Asia (say around 600 kg/capita) would increase worldwide cement consumption by about 13%, and it does seem as if India’s cement use is trending upward.
By contrast, one thing clear from this data is that the U.S. actually uses an unusually low amount of concrete. Per capita, it uses as little as any other Western country, and far, far less than some — like, surprisingly, Belgium.
So we’ve seen where it gets used in the world. Can we go deeper and look at specifically what concrete is being used for?
This will vary significantly depending on the region and the local construction tradition. In the U.S., we have roughly the following breakdown (via the Portland Cement Association):
Overall, roughly half of our concrete gets used in buildings — about 26% goes into residential buildings, 2% in public buildings, and 16% into commercial buildings. The other half gets used for infrastructure — streets and highways, water conveyance and treatment tanks, etc. Because most construction in the U.S. is just one- or two-story buildings (mostly wood for residential buildings and steel for commercial ones), concrete in buildings is probably mostly going into foundations, slabs on grade, and concrete over metal deck, though there’s probably a substantial amount going into concrete masonry units as well.
But the U.S. has a somewhat unusual construction tradition, where the vast majority of our residential construction, both single-family homes and multifamily apartments, is built from light-framed wood. In other places, it's much more common to use concrete. For instance, the U.K. uses closer to 80% of its concrete for buildings, with most of that going toward the superstructure, the concrete frame that holds the building up. China, which has urbanized on the back of huge numbers of concrete residential high rises, probably devotes an even larger share of its concrete to residential construction.
Understanding how much concrete the world uses, and where it’s being used, is important if you want to use less of it.
The scale of the industry is particularly important to keep in mind. For instance, you often see enthusiasm for the idea of replacing concrete buildings with mass timber ones. But assuming you could substitute all the world’s concrete for an equal volume of wood [9], you’d need to more than triple the total annual volume of global wood harvested [10], which puts a somewhat different spin on the issue.
Most other materials would have emissions as bad or worse than concrete if they were used on the same scale.
Consider, for instance, railway ties. In the U.S., these are still largely made out of wood, but in many places they have been replaced with concrete ties. And some places are considering changing from concrete ties to plastic composite rail ties instead. It’s hard to know the exact embodied emissions without a lot of specific details about the materials and supply chains used, but can we ballpark how much a plastic tie uses compared to a concrete one?
Per the Inventory of Carbon and Energy database, concrete varies between 150 and 400 kg of embodied CO2 per cubic meter, depending on the properties of the mix, with an “average” value of about 250. Plastics mostly have embodied emissions of about 3-4 kg of CO2 per kg of plastic, or about 3,500 kg per cubic meter (assuming a density of about 1,000 kg per cubic meter). So per unit volume, plastic has somewhere around 10 times the embodied emissions of concrete.
We can also do a more direct comparison. Consider a beam spanning around 20 feet and supporting a vertical load of 21,000 pounds per linear foot. The lightest U.S. standard steel section that will span this distance is a W16x26, which weighs about 236 kg and will have embodied carbon emissions of around 354 kg.
A concrete beam of the same depth, supporting the same load and spanning the same distance, will be 10.5 inches wide by 16 inches deep, with three #10 steel bars running along the bottom. This beam will have about 190 kg of embodied emissions from the concrete, and about another 230 kg of embodied emissions from the steel rebar. This is about 20% more than the steel beam, but in the same ballpark — and over half the “concrete” emissions are actually due to the embedded reinforcing steel.
This is arguably a nonrepresentative example (most concrete, such as in columns or slabs, will have a much lower ratio of steel), but the basic logic holds: Concrete is unusual in its total volume of use, not how emissions-heavy it is as a material. Most material substitutes that aren’t wood, recycled materials, or industrial byproducts that can be had for “free” won’t necessarily be much better when used at the same scale. In some ways, it’s surprising that the carbon emissions from concrete are as low as they are.
Of course, this calculus is likely to change over time — as electricity sources change over to lower carbon ones, you’re likely to see the embodied emissions of materials drop along with it. And since cement releases CO2 as part of the chemical process of producing it, concrete will look increasingly worse compared to other materials over time.
One potential option is to find ways of changing the cement production process to be less carbon-intensive. The easiest option is to just replace manufactured Portland Cement with some other cementitious material. Industrial byproducts such as blast furnace slag, silica fume, and fly ash, often have cementitious properties and don’t have a “carbon penalty” (since they’d be produced regardless.) Materials like these can potentially eliminate large volumes of cement in a concrete mix, and they’re a key part of current low-carbon concrete strategies — even “normal” concrete mixes tend to utilize these to some degree. But the total volume of these materials is limited by the extent of various industrial processes. And for things like fly ash (which is a byproduct from coal plants) and slag (which is a byproduct from CO2-emitting blast furnaces), we can expect production to decline over time.
Another option is to take advantage of the fact that concrete will naturally absorb CO2 over time, a process known as carbonation. Even normal concrete will absorb roughly 30% of the CO2 emitted during the production process over the course of its life. Companies like Carbicrete, Carboncure, Carbonbuilt, and Solida all offer methods of concrete production that allow the concrete to absorb CO₂ during the production process, substantially reducing embodied emissions. Interestingly, these producers mostly claim that their concrete is actually cheaper than conventional concretes, which would obviously be a massive tailwind for the technology’s adoption.
It’s not obvious what the best path forward is for addressing concrete carbon emissions (like with most things, I suspect it’ll end up being a mix of different solutions), but understanding the parameters of the problem is necessary for solving it.
Note: A version of this article originally appeared in the author’s newsletter, Construction Physics, and has been repurposed for Heatmap.
[0] - This figure varies depending on the source. Chatham House provides a frequently cited estimate of 8%. We can also ballpark it — roughly 0.93 pounds of CO₂ gets emitted for each pound of cement produced, around 4.25 billion tons of cement are produced annually, which gets ~3.95 billion tons of CO₂, and total annual CO₂ emissions are in the neighborhood of 46 billion tons, getting us a bit less than 9%.
[1] - Per Circular Ecology, ~70-90% of emissions are from the cement production process, depending on the type of concrete and what the rest of the supply chain looks like.
[2] - This seems to vary depending on where the cement is being made — in Myanmar, for instance, it’s around 46%.
[3] - Another number where the sources often don’t agree with each other, see here, here, and here for estimates on annual cement production.
[4] - Concrete is roughly 10-15% cement by weight, depending on the strength of the mix, what other cementitious materials are being used, etc. An average value of 12.5% yields 34 billion tons, which we’ll knock down to account for other uses of cement (masonry mortar, grout, gypsum overlay, etc.) This roughly tracks with estimates from PCA (“4 tons of concrete produced each year for every person on Earth”), and from the now-defunct Cement Sustainability Initiative, which estimated 25 billion tons of concrete against 3.125 billion tons of cement in 2015.
[5] - See here, here, and here for an estimate of total civilization mass flow. This doesn’t (I believe) include waste byproducts, which can be substantial — for instance, it doesn’t include the ~46 billion tons of CO₂ emitted each year, or the 16 billion tons of mine tailings, or the 140 billion tons of agriculture byproducts (though this last number is difficult to verify and seems high).
[6] - We see something similar with cement as we do with other bulky, low-value materials, in that it's made in lots of distributed manufacturing facilities relatively close to where it’s used. See here for a map of cement plants in the U.S. around 2001, for instance.
[7] - For China’s total floor space, see here (most sources seem to agree with these numbers). For U.S. floor space, see my Every Building In America article. For per-capita living space in Europe, see here.
[8] - The often high rates of cement use by middle-income countries have led some folks to develop a U-shaped cement consumption theory of industrial development — that countries start out using a small amount of cement, use more as they get richer and build up their physical infrastructure, and then eventually transition to using lower volumes of cement again. The Globbulk paper spends considerable time debunking this.
[9] - It’s not actually obvious to me what the substitution ratio would be. In strength-governed cases, you’d need proportionally more timber than concrete, but in other cases (such as replacing concrete walls with light-framed stud walls), you’d probably use less. Obviously, you can’t substitute all concrete for wood, but you can probably switch out more than you think — there’s no reason you couldn’t use wood foundations instead of concrete ones in many cases, for instance.
[10] - 30 billion tons of concrete is roughly 12.5 billion cubic meters, and total annual wood products produced is currently around 5.5 billion cubic meters.
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The new climate politics are all about affordability.
During the August recess, while members of Congress were back home facing their constituents, climate and environmental groups went on the offensive, sending a blitz of ads targeting vulnerable Republicans in their districts. The message was specific, straightforward, and had nothing to do with the warming planet.
“Check your electric bill lately? Rep. Mark Amodei just voted for it to go up,” declared a billboard in Reno, Nevada, sponsored by the advocacy group Climate Power.
“They promised to bring down prices, but instead our congressman, Derrick Van Orden, just voted to make our monthly bills go up,” a YouTube ad told viewers in Wisconsin’s 3rd district. “It removes clean energy from the electric grid, creating a massive rate hike on electricity,” the voiceover says, while the words “VAN ORDEN’S PLAN: ELECTRICITY RATE HIKE” flash on screen. The ad, paid for by Climate Power, the League of Conservation Voters, and House Majority Forward, a progressive campaign group, was shown more than a million times from August 13 to 27, according to Google’s ad transparency center.
Both were part of a larger, $12 million campaign the groups launched over the recess in collaboration with organizations including EDF Action and Climate Emergency Advocates. Similar billboards and digital ads targeted Republicans in more than a dozen other districts in Arizona, California, Colorado, Iowa, Michigan, New York, Ohio, Pennsylvania, and Texas. There were also TV spots, partnerships with Instagram influencers, bus stop posters, and in-person rallies outside district offices — all blaming Republicans in Congress for the increasing cost of food, healthcare, and energy.
Courtesy of Climate Power
As others have observed, including Heatmap’s Matthew Zeitlin back in March, rising utility rates and the broader cost of living crisis are becoming a political liability for Republicans and President Trump. Clean energy advocates are attempting to capitalize on that, trying to get Americans to connect the dots between their mounting electricity bills and their representatives in Congress who voted to cut support for renewable energy.
Some of this is run-of-the-mill politicking, but it’s not only that. It also represents a strategic shift in how the climate movement talks about the energy transition.
It’s not new for green groups to make the argument that renewable energy can save people money. Relying on “free” wind and sun rather than fuels that are subject to price volatility has always been part of the sell, and the plummeting cost of solar panels and wind turbines have only made that pitch more compelling.
But it is new for the affordability argument to come first — above job creation, economic development, reducing pollution, and, of course, tackling climate change.
For most of the past four years, the climate movement has gone all in on trying to build an association in the American mind between the transition to clean energy and jobs. “When I think of climate change, I think of jobs,” then-candidate Joe Biden said during one of his 2020 campaign speeches.
It made sense at the time, Daniel Aldana Cohen, a sociologist at the University of California, Berkeley, told me. Just two years earlier, the Sunrise Movement had emerged as a political force with a headline-grabbing rally in Nancy Pelosi’s office demanding “green jobs for all.” The group was joined by then-newly elected Representative Alexandria Ocasio-Cortez, who soon introduced her framework for a Green New Deal that would offer a “just transition” for fossil fuel workers, ensuring them a place in the new clean energy economy.
The fossil fuel industry had seeded divisions between labor and environmental groups for decades by arguing that regulations kill jobs, and Democrats would have to upend that narrative if they wanted to make progress on climate. But the rationale was also more pressing: Unemployment was skyrocketing due to the COVID-19 pandemic, and whoever won the presidency would be responsible for rebuilding the U.S. workforce.
Fast forward to the end of Biden’s first year in office, however, and the unemployment rate had snapped back to pre-pandemic levels. Meanwhile, inflation was rising fast. Even though the Democrats managed to name their climate bill the “Inflation Reduction Act,” the administration and the climate movement continued talking about it in terms of jobs, jobs, jobs.
Cohen co-directs the Climate and Community Institute, a progressive think-tank founded in 2020, and admitted that “from the very start, we would just model every policy with jobs numbers,” partly because modeling the effects of policies on cost of living was a lot more complicated. Now he sees two issues with that approach. For one, it was always going to take time for new manufacturing jobs to materialize — much longer than an election cycle. For another, when unemployment is low, “everybody experiences inflation, but extremely few people experience a good new green job,” Cohen said.
During a recent panel hosted by the Institute for Policy Studies, Ben Beachy, who was a special assistant to Biden for climate policy, expressed some regret about the jobs push. “It wasn't addressing one of the biggest economic concerns of most people at that point, which was the rent is too damn high,” he said. But Beachy also defended the strategy, noting that all of the policies addressing cost of living in Biden’s big climate bill, like money for housing, public transit, and childcare, had been stripped out to appease West Virginia Democrat Joe Manchin. “So we were left without a strong policy leg to stand on to say, this is going to lower your costs.”
When the moderator asked what message Beachy thinks climate candidates should run on today, Beachy replied, “affordability, affordability, affordability.”
Jesse Lee, a senior advisor at Climate Power who also worked as a senior communications advisor in the Biden White House, echoed Beachy’s account of what went wrong post-IRA. The cost of living crisis makes it almost impossible to talk about anything else now, he told me. “If you don't start off talking about that, you’ve lost people before you’ve even begun,” he said.
Average U.S. electricity rates jumped 10% in just the year from 2021 to 2022, and have continued to rise faster than inflation. All evidence suggests the trend will continue. Utilities have already requested or received approval for approximately $29 billion in rate increases this year, according to the nonprofit PowerLines, compared to roughly $12 billion by this time last year. And these increases likely don’t reflect the expected costs associated with ending tax credits for wind and solar, hobbling wind and solar development, and keeping aging, expensive coal plants online.
In mid-July, Climate Power issued a strategy document advising state and local elected officials how to talk about clean energy based on the group’s polling. A post-election poll found that “more than half of Americans (51%) say the main goal of US energy policies should be to lower energy prices,” and that 85% “believe policymakers should do more to lower energy costs.” A more recent poll found that telling voters that “cutting clean energy means America produces less energy overall, and that means families will pay even more to keep the lights on,” was the most persuasive among a variety of arguments for clean energy.
This tracks with our own Heatmap Pro opinion polling, which found that the top perceived benefit of renewables in the U.S. is “lower utility bills” — though while 75% of Democrats believe that argument, only 56% of Republicans do. An affordability frame also aligns with academic research on clean energy communication strategies, which has found that emphasizing cost savings is a more effective and enduring message than job creation, economic development, or climate change mitigation.
The pivot to affordability isn’t just apparent in district-level campaigns to hold Republicans accountable. Almost every press release I’ve received from the climate group Evergreen Action this month has mentioned “soaring power bills” or “Trump’s energy price hike” in reference to various actions the administration has taken to hamstring renewables. Even clean energy groups, which at first attempted to co-opt Trump’s “energy dominance” frame, can no longer parrot it with a straight face. After Trump issued a stop work order on Orsted’s offshore Revolution Wind project, which is 80% built, the American Clean Power Association accused the administration of “raising alarms about rising energy prices while blocking new supply from reaching the grid.”
Several people I spoke to for this story pointed to the example of Mikie Sherill, the Democrat running for governor in New Jersey, who last week vowed to freeze utility rates for a year if elected. She immediately followed that statement with a promise to “massively expand cheaper, cleaner power generation,” including solar and batteries.
Dan Crawford, the senior vice president of Echo Communications Advisors, a climate-focused strategy firm, declared in a recent newsletter that Democrats should “become the party of cheap electricity.” He mused that we may be at an inflection point “where the old politics of clean-vs.-polluting makes way for a new debate of cheap-vs.-expensive.”
Debate is probably too tame a term — the claim to affordability is becoming a full-on messaging war. Last week, President Trump took to social media to declare that states that get power from wind and solar “are seeing RECORD BREAKING INCREASES IN ELECTRICITY AND ENERGY COSTS,” — a claim that has no basis in reality. The Trump administration is leaning heavily on affordability arguments to justify keeping coal plants open. In defense of canceling Revolution Wind, Interior Secretary Doug Burgum told Fox News that “this is part of our drive to make sure we’ve got affordable, reliable energy for every American … These are the highest electric prices in the country coming off of these projects.” On Thursday, Energy Secretary Chris Wright posted a news story about his agency rescinding a loan for an offshore wind transmission project, writing that “taxpayers will no longer foot the bill for projects that raise electricity prices and ultimately don't work.”
Clean energy proponents aren’t just going up against Trump — the fossil fuel industry has leaned on affordability as a rhetorical strategy for a long time, Joshua Lappen, a postdoctoral fellow at the University of Notre Dame studying the energy transition, told me. Lappen, who lives in California, said cost has been at the forefront of conflicts over climate policy in the state for a while. At the moment, it’s driving a fight over oil refinery closures that threaten to drive up gas prices even more. “I took a trip over the weekend and drove through the Central Valley,” Lappen told me, “and there are placards zip-tied to every gas pump at Chevron stations that are highlighting that state climate policy is increasing the cost of gas.”
I asked Lee, of Climate Power, how the climate movement could make a convincing case when clean energy has become so politically charged. He’s not worried about that right now. “I don’t think we necessarily need to win a debate about what’s cheaper,” he said. “All we have to do is say, Hey, we're in favor of more energy, including wind and solar, and it's nuts, nuts to be taking wind and solar and batteries off the table when we have an energy crisis and when utility rates have gone up 10%.”
That may work for now, at least at the national level. Americans tend to blame whoever is in office for the economic pains of the moment, even though presidents have little influence on prices at the pump and it can take years for policy changes to make their way into utility rates.
But there’s a difference between defensively blaming rising energy costs on the administration’s efforts to block renewables, and making a positive case for the energy transition on the same grounds. While there is an argument for the latter, it’s a lot harder to convey.
The factors pushing up energy prices, such as necessary grid modernization and disaster-related costs, likely aren’t going away, whether or not we build offshore wind farms. Meanwhile, the savings that large-scale wind and solar projects offer won’t be experienced as a reduction in rates — they won’t be experienced at all because they’re measured against a counterfactual world where renewables don’t get built. That’s a lot trickier to communicate in a pithy campaign. People may end up blaming the wind farms either way.
This dilemma is a hallmark of the so-called “mid-transition,” Lappen told me. The term was coined by his advisor, the energy engineer and sociologist Emily Grubert, and Sara Hastings-Simon, a public policy professor at the University of Calgary. The two argue that the mid-transition is a period where fossil fuel systems persist alongside the growing clean energy sector.
“Comparisons of the new system to the old system are likely to rest on experience of a world less affected by climate change, such that concerns about lower reliability, higher costs, and other challenges might be perceived as inherent to zero-carbon systems, versus energy systems facing consequences of climate change and long-term underinvestment,” they write.
To Cohen, advocates need to go a lot further than rhetoric to link clean energy with affordability. “We need to rebuild the brand and then rebuild the investment priorities of climate action so that working class communities see and literally touch direct, tangible benefits in their life,” he said. He described a “green economic populism” with much more public investment in helping renters access green technologies that will lower their bills, for example, or in fixing up homes that have deferred maintenance so that they can eventually make energy efficiency improvements.
It’s not about abandoning industrial policy or research and development, Cohen told me, but rather about a shift in emphasis. He pointed to Sherill’s approach. “She's not just saying, oh, clean energy will automatically lower bills if you just unleash it. She's like, I'm going to assertively use the government to guarantee a price freeze, and then I’m going to backfill that with clean energy policies to bring down prices over time.”
To be fair, the IRA did contain policies that would have produced more tangible benefits. The $7 billion Solar for All program would have delivered the benefits of residential solar — i.e. energy bill savings — to low-income households all over the country. The remainder of the Greenhouse Gas Reduction Fund, of which Solar for All was a part, was set to make a range of other green home upgrades more accessible to the working class, and the Green and Resilient Retrofit Program would have done the same for low-income housing developments and senior living centers. Electric school bus grants and urban tree-planting programs would have brought cleaner, cooler air to communities.
These were big, ambitious programs that were never going to produce results in the span of two years, and now the Trump administration has made every effort to ensure they never do. Whether they would have paid political dividends eventually, we’ll never know. But a successful energy transition may depend on giving it another shot.
On fusion’s big fundraise, nuclear fears, and geothermal’s generations uniting
Current conditions: New Orleans is expecting light rain with temperatures climbing near 90 degrees Fahrenheit as the city marks the 20th anniversary of Hurricane Katrina • Torrential rains could dump anywhere from 8 to 12 inches on the Mississippi Valley and the Ozarks • Japan is sweltering in temperatures as high as 104 degrees.
The Environmental Protection Agency is preparing to propose a new Clean Water Act rule that would eliminate federal protections for many U.S. waterways, according to an internal presentation leaked to E&E News. If finalized, the rule would establish a two-part test to determine whether a wetland received federal regulations: It would need to contain surface water throughout the “wet season,” and it would need to be touching a river, stream, or other body of water that flows throughout the wet season. The new language would require fewer wetland permits, a slide from the presentation showed, according to reporter Miranda Willson. Two EPA staffers briefed on the proposal confirmed the report.
The new rule follows the 2023 Supreme Court decision in Sackett v. EPA, which said that only waterways “with a ‘continuous surface connection’ to a ‘relatively permanent’ body of water” fell under the Clean Water Act’s protections, according to E&E News. What “relatively permanent” means, however, the court didn’t say, nor did Biden’s EPA. The two EPA staffers, who were granted anonymity to avoid retribution, “said they believed the proposal was not based in science and could worsen pollution if finalized,” Willson wrote.
Investors are hot on the Massachusetts Institute of Technology spinoff promising to make fusion energy a reality. Commonwealth Fusion Systems netted an eye-popping $863 million in its latest fundraising round. In a press release Thursday, the company said that its “oversubscribed round of capital is the largest amount raised among deep tech and energy companies since” its $1.8 billion financing deal in 2021. Commonwealth Fusion will use the funds to complete its demonstration project and further develop its proposed first power plant in Virginia. To date, the company said, it has raised close to $3 billion, “about one-third of the total capital invested in private fusion companies worldwide.” It’s a sign that investors recognize Commonwealth Fusion “is making fusion power a reality,” CEO Bob Mumgaard said.
The fusion industry has ballooned over the past six years. “It is finally, possibly, almost time” for the technology to arrive, Heatmap’s Katie Brigham wrote last year, noting: “For the ordinary optimist, fusion energy might invoke a cheerful Jetsons-style future of flying cars and interplanetary colonization. For the cynic, it’s a world-changing moment that’s perpetually 30 years away. But investors, nuclear engineers, and physicists see it as a technology edging ever closer to commercialization and a bipartisan pathway towards both energy security and decarbonization.”
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A record 75 gigawatts of new generating capacity hooked up to the U.S. power grid last year, a 33% surge from the previous year, thanks to new federal regulations aimed at streamlining the process. That’s according to new data from the consultancy Wood Mackenzie published Thursday. The report found that the Federal Energy Regulatory Commission’s Order No. 2023, issued in July 2023, along with other reforms by independent system operators, have had a “considerable impact on processing interconnection agreements, by driving improvements through reducing speculative projects and clearing queue backlogs.” While connections increased, regional grid operators received 9% fewer new project entries and saw a 51% uptick in non-viable projects since 2022.
Solar and storage technologies made up 75% of all interconnection agreements in 2024, equaling about 58 gigawatts. Wood Mackenzie projected that the sectors will retain a similar market share in 2025. Natural gas saw an increase in interconnection requests since 2022, adding 121 gigawatts of capacity. New gas applications are already breaking annual records this year. But overall the number of gas projects that successfully hook up to the grid is down 25% since 2022.
Almost 200 people have left the Nuclear Regulatory Commission since President Donald Trump’s inauguration in January, according to new estimates published Thursday in the Financial Times. Of the 28 officials in senior leadership positions, nearly half are working in an “acting” capacity, and only three of the five NRC commissioner roles are filled. “It is an unprecedented situation with some senior leaders having been forced out and many others leaving for early retirement or worse, resignation,” Scott Morris, the former NRC deputy executive director of operations, who retired in May, told the newspaper. “This is really concerning for the staff and is one of the factors causing many key staff and leaders to leave the agency they love ... creating a huge brain drain of talent.”
The exodus comes as Trump is pressing the agency to dramatically overhaul and speed up its review and approval process for new reactors. Supporters of the president’s effort say the NRC has stymied the nuclear industry for decades, and a future buildout of new reactors requires clearing house. But skeptics of the burn-it-all-down approach warn that the atomic energy industry’s success in avoiding major accidents since the 1979 partial meltdown at Three Mile Island is owed to NRC oversight, and that the agency’s processes have actually protected nuclear developers by avoiding frivolous lawsuits and not-in-my-backyard types.
Geothermal giant Ormat has reigned over the global industry of harvesting energy from hot underground reservoirs for the past 60 years. Now a new generation of companies is promising to tap the Earth’s heat even in places without water by using fracking technology to drill much deeper, vastly expanding the potential for geothermal. And Ormat has placed a big bet on one. On Thursday, the company inked a strategic partnership with Houston-based Sage Geosystems. As part of the deal, Sage will build its first commercial power plant at an existing Ormat facility in Nevada or Utah, significantly speeding up the timeline for the debut generating station. Sage CEO Cindy Taff told me the plant could be online by next year. “Ormat’s chosen a winner,” Yakov Feygin, a researcher at the Center for Public Enterprise who co-authored a report on next-generation geothermal, told me.
A majority of U.S. voters are still unfamiliar with geothermal power, according to a new poll from Data for Progress I reported on this week. When exposed to details about how the technology works, however, support grows among voters across the political spectrum. Republicans in particular are supportive.
A recent poll shows a lack of familiarity with geothermal.Data for Progress
The Grammy- and Oscar-award winning New Orleans jazz and funk singer Jon Batiste released a new song to mark the 20th anniversary of Hurricane Katrina, the catastrophic storm that flooded his home city. Dubbed “Petrichor,” a word that describes the scent of earth after rain, the lyrics unfold like a haunting hymn over a driving beat. “Help me, Lord / They burning the planet down / No more second linin' in the street / They burning the planet down, Lord / Help me, Lord / No more plants for you to eat.” In an interview published in The Guardian, Batiste said the song was meant to be a statement. “You got to bring people together. People power is the way that you can change things in the world,” he said. “It’s a warning, set to a dance beat.”
How the Migratory Bird Treaty Act could become the administration’s ultimate weapon against wind farms.
The Trump administration has quietly opened the door to strictly enforcing a migratory bird protection law in a way that could cast a legal cloud over wind farms across the country.
As I’ve chronicled for Heatmap, the Interior Department over the past month expanded its ongoing investigation of the wind industry’s wildlife impacts to go after turbines for killing imperiled bald and golden eagles, sending voluminous records requests to developers. We’ve discussed here how avian conservation activists and even some former government wildlife staff are reporting spikes in golden eagle mortality in areas with operating wind projects. Whether these eagle deaths were allowable under the law – the Bald and Golden Eagle Protection Act – is going to wind up being a question for regulators and courts if Interior progresses further against specific facilities. Irrespective of what one thinks about the merits of wind energy, it’s extremely likely that a federal government already hostile to wind power will use the law to apply even more pressure on developers.
What’s received less attention than the eagles is that Trump’s team signaled it could go even further by using the Migratory Bird Treaty Act, a separate statute intended to support bird species flying south through the U.S. from Canada during typical seasonal migration periods. At the bottom of an Interior press release published in late July, the department admitted it was beginning a “careful review of avian mortality rates associated with the development of wind energy projects located in migratory flight paths,” and would determine whether migratory birds dying because of wind farms qualified as “‘incidental’ takings” – harm or death – under the Migratory Bird Treaty Act.
While not stated explicitly, what this means is that the department appears to be considering whether to redefine these deaths as intentional under the Migratory Bird Treaty Act, according to Ben Cowan, a lawyer with the law firm Troutman Pepper Locke.
I reached out to Cowan after the eagle investigation began because his law firm posted a bulletin warning that developers “holding active eagle permits” might want to prepare for “subpoenas that may be forthcoming.” During our chat earlier this month, he told me that the eagle probe is likely going to strain financing for projects even on private lands that wouldn’t require any other forms of federal sign-off: “Folks don’t want to operate if they feel there’s a significant risk they might take an eagle without authorization.”
Cowan then voiced increasing concern about the migratory bird effort, however, because the law on this matter could be a quite powerful – if legally questionable – weapon against wind development.
Unlike the Endangered Species Act or the eagle protection law, there is currently no program on the books for a wind project developer to even obtain a permit for incidental impacts to a migratory bird. Part of the reason for the absence of such a program is the usual federal bureaucratic struggle that comes with implementing a complex statute, with the added effect of the ping-pong of federal control; the Biden administration started a process for permitting “incidental” impacts, but it was scrapped in April by the Trump team. Most protection of migratory birds under the law today comes from voluntary measures conducted by private companies and nonprofits in consultation with the federal government.
Hypothetically, hurting a migratory bird should be legally permissible to the federal government. That’s because the administration loosened implementation of the law earlier this year with an Interior Department legal opinion that stated the agency would only go after harm that was “intentional” – a term of art under the statute.
This is precisely why Cowan is fretting about migratory birds, however. Asked why the wind industry hasn’t publicly voiced more anxiety about this potential move, he said industry insiders genuinely hope this is “bluster” because such a selective use of this law “would be so beyond the pale.”
“It’s basically saying the purpose of a wind farm is to kill migratory birds, which is very clearly not the case – it’s to generate renewable electricity,” Cowan told me, adding that any effort by the Interior Department would inevitably result in lawsuits. “I mean, look at what this interpretation would mean: To classify it as intentional take would say the purpose of operating a wind farm would be to kill a bird. It’s obviously not. But this seems to be a way this administration is contemplating using the MBTA to block the operation of wind farms.”
It’s worth acknowledging just how bonkers this notion is on first blush. Is the federal government actually going to decide that any operating wind farm could be illegal? That would put entire states’ power supplies – including GOP-heavy states like Iowa – in total jeopardy. Not to mention it would be harmful overall to take operating capacity offline in any fashion at a moment when energy demand is spiking because of data centers and artificial intelligence. Even I, someone who has broken quite a few eye-popping stories about Trump’s war on renewables, struggle to process the idea of the government truly going there on the MBTA.
And yet, a door to this activity is now open, like a cleaver hanging over the industry’s head.
I asked the Interior Department to clarify its timeline for the MBTA review. It declined to comment on the matter. I would note that in mid-August, the Trump administration began maintenance on a federal dashboard for tracking regulations such as these and hasn’t updated it since. So we’ll have to wait for nothing less than their word to know what direction this is going in.