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They haven’t even been announced yet, but the idea that they will has sent prices soaring.

China, Canada, Mexico, steel, aluminum, cars, and soon, copper. That’s what the market has concluded following a Bloomberg News report last week that copper tariffs would arrive far sooner than the 270 days President Trump gave the Department of Commerce to conduct its investigation into “dumping” of the metal.
Copper has been dubbed the “metal of electrification,” and demand for it is expected to skyrocket under any reasonable scenario to contain global temperature rise. Even according to a U.S. administration that, at best, neglects climate change considerations, copper is an “essential material for national security, economic strength, and industrial resilience,” as the Trump White House said while announcing its investigation into copper imports.
The effort to boost domestic production of copper did not start with this White House, but it has historically run into the same problems that beset the mining industry: New production can take decades to begin, even after you find the minerals you’re looking for underground. And if demand is not assured — if, for instance, subsidies for electric vehicles filled with copper disappear — then investing in new production could lead to bankruptcy, whereas holding back on new capacity would, at worst, mean forgoing some profits.
The Trump administration and the broader energy and foreign policy community have been, in general, obsessed with rocks — critical minerals, rare earths, and other minerals that are indeed “critical” to much of the economy but are not listed as such. Copper sits somewhere between these categories — while it does not appear on the United States Geological Survey list of critical minerals, which ranges from aluminum and antimony to zinc and zirconium, it does appear on the Department of Energy’s list of “critical materials.”
These lists guide federal data collection efforts, and that data can then get used to guide policymaking. Being on these lists doesn’t guarantee that a related program will get funding, but it does mean that the data is there to draw from should someone need to make a case for why their program should get funding.
This gap between the lists has been a target for Congress, especially for legislators in the Southwest, where much of America’s copper is mined. The discrepancies in the list is essentially a matter of focus for the Energy and Interior Departments — with Energy naturally focused on what’s especially important for energy infrastructure. Getting consistency between the lists, which are only a few years old, will “increase transparency within our federal agencies, ensuring all of our nation’s critical resources are developed, traded, and produced equally, and strengthen our supply chains,” Mike Lee (R-Ut), a sponsor of the Senate version of the legislation, said in a statement.
Trump’s executive order asking for the investigation sought to speed up permitting for new mines — and they’ll need all the help they can get. S&P calculates that the average copper mine takes over 30 years to develop. Rio Tinto and BHP’s Resolution Copper project in Superior, Arizona — which the companies hope will produce 20 million tons of copper — has already sucked up some $2 billion of capital while producing zero copper after about 20 years of legal and political opposition. A proposed copper-nickel mine in Minnesota has already absorbed around $1 billion worth of investment and is still wrangling over the more than 20 permits it needs.
But for the Trump administration’s strategy of tariffs and expedited permitting to actually work for American copper end users, it will have to lead to an expansion of smelting and recycling, in addition to mining.
Reuters reported last year that the Mexican conglomerate Grupo Mexico would re-open an Arizona smelter, but that has yet to happen (it’s currently a Superfund site). A copper mine in Milford, Utah said last week that it was expanding to meet rising copper demand.
The smelting sector is dominated by China. “The United States has ample copper reserves, yet our smelting and refining capacity lags significantly behind global competitors,” the White House said in its copper executive order in February. China’s dominance, “coupled with global overcapacity and a single producer’s control of world supply chains, poses a direct threat to United States national security and economic stability.”
The United States produces around 1.2 million tons of copper annually from its mines and imports around 900,000 tons, according to the United States Geological Survey. Some of that domestically mined copper — around 375,000 tons worth — ends up being exported for smelting, according to the Copper Development Association.
While the United States is near the top of national copper production (well behind the world leader, Chile, but comparable to other large-scale copper producers such as Indonesia and Australia), it has a meager copper refining industry, with only two active smelters producing around 400,000 tons of copper a year — a fraction of China’s refining capacity — leaving American industry reliant on imports.
The energy industry has been dealing with the copper issue for years. More specifically, it’s worrying about how domestic and global production will be able to keep up with what forecasters anticipate could be massive demand.
That goes not just for copper — it also includes the metals that are mined alongside it. First Solar, the U.S.-based solar manufacturing company, has benefited from tariffs on solar panels put in place during the Biden administration. But while First Solar has been a winner in the renewable energy trade conflict, it is still sensitive to the global trade in commodities. That’s in part because it is also a major consumer of tellurium, a mineral that’s a byproduct of copper mining, and which was the subject of expanded export Chinese export controls announced early last month.
“We have, over the past decade employed a strategic sourcing strategy to diversify our tellurium supply chain to mitigate a sole sourcing position in China and are undertaking additional measures to mitigate dependencies on China for certain products containing to tellurium,” Alexander Bradley, First Solar’s chief financial officer, said in the company’s February earnings call. “While we continue to evaluate [whether] there will be any operational impact from China's decision, this latest development emphasizes the urgent need for the United States to accelerate the strategic development of copper mining and processing of its byproduct materials, including tellurium.”
Electric vehicles are another major user of copper among climate technologies, with EVs having on average around 180 pounds of copper in them, according to the Copper Development Association. Tesla — which will soon be hit by auto tariffs — has been actively trying to reduce its copper consumption. Meanwhile Rivian, one of Tesla’s primary domestic competitors, announced last year that it would cut its production targets dramatically due to what turned out to be a supplier communication snafu for a copper component of its motors.
“We’re very bullish on copper prices,” Kathleen Quirk, chief executive officer of Freeport-McMoRan, which runs a number of U.S. copper mines (and a smelter, to boot), said at a financial conference in February. With boosts in demand coming from “power generation, new power generation investments, multibillion-dollar investments in infrastructure and energy infrastructure, it's going to be very positive for copper.”
Copper prices paid by American manufacturers have been rising for the past five months, according to the monthly PMI survey. Prices in New York reached record highs last week, hitting almost $12,000 per ton as the industry tried to beat the almost-certainly-inevitable tariffs, according to an ING analyst report released last week.
The actual imposition of the tariffs would constitute a “further upside risk to copper prices” — in other words, prices will continue to climb, according to the ING analysts. “The U.S. copper rush could leave the rest of the world tight on copper if demand picks up more quickly than expected,” the ING analysts wrote.
Copper futures have shot up this year by around 25%, leading to profits for those who mine it — especially in the United States.
From the perspective of Freeport-McMoRan, the market gyrations so far have generally been to the upside, with the premium on copper in the U.S. “helping us from that perspective of generating higher revenues for our U.S. price copper,” Quirk said at the conference. But the domestic copper industry as a whole does not see tariffs as the sole way to increase copper production.
“The U.S. will need an all-of-the-above sourcing strategy to secure a stable supply for domestic use. This must include increased mining in the U.S., increased smelting and refining in the U.S., enhanced recycling, keeping more copper scrap within U.S. borders, and continued trade with reliable partners to maintain the flow of critical raw material feedstocks for domestic use,” Copper Development Association chief executive Adam Estelle told me in an emailed statement.
And tariffs can come in faster than new mines and smelters can be built or their capacity expanded. American mining projects have been mired in decades of permitting delays and negotiations with local communities not because there isn’t a market opportunity for new copper, but because it just takes a very long time to open a mine.
Even as she was celebrating Freeport-McMoRan’s robust outlook, CEO Kathleen Quirk noted that “at the same time, it's become more and more difficult to develop new supplies of copper.”
That goes especially for industries related to renewable energy, where copper finds itself into grid equipment, solar panels, and wind turbines. Even so, they’ve been wary of talking about an impending tariff directly.
A number of trade groups, including the Zero Emission Transportation Association, the National Electrical Manufacturers Association, and the Solar Energy Industries Association, hailed an executive order aiming to accelerate critical minerals production released March 20. When I asked about copper tariffs, however, a ZETA spokesperson referred me to an earlier statement decrying trade conflict with Canada and Mexico, saying that “imposing tariffs on allies and trading partners like Canada and Mexico — both of which play a significant role in the North American automotive supply chain — will increase costs to consumers and make it more difficult to attract investment into our communities.”
Meanwhile, NEMA’s vice president of public affairs, Spencer Pederson, told me in an emailed statement that “any new trade policies must provide predictability and certainty for future domestic investments and businesses.”
Other manufacturing-centric industries that use copper aren’t thrilled about the prospect of tariffs, either. A spokesperson for the National Association of Manufacturers referred me to its recent survey showing that the top two concerns among its members were “trade uncertainties,” feared by more than three quarters of respondents, and “increased raw material costs,” which worried 60% of respondents. While NAM is broadly supportive of many Trump administration goals, especially around extending the 2017 tax cuts, it has called for a “commonsense manufacturing strategy” which includes “making way for exemptions for critical inputs.” That runs against the Trump administration’s preference for big, obvious tariffs.
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The administration filed to dismiss an appeal of a December ruling that overturned its offshore wind permitting freeze.
Trump’s Department of Justice is giving up on defending the president’s offshore wind permitting moratorium.
The DOJ filed a motion on Wednesday to dismiss its appeal of a federal court’s December decision vacating the order to halt offshore wind approvals. The plaintiffs in the case — New York and 16 other states, as well as the Alliance for Clean Energy New York, a trade group — did not oppose the motion. The case will not be officially dismissed, however, until the First Circuit Court of Appeals approves the request, which typically happens quickly when both parties support the dismissal.
The case stems from an executive order President Trump issued on the first day of his current term temporarily withdrawing all areas of the outer continental shelf from offshore wind leasing and pausing all federal authorizations for offshore wind projects while the administration conducted a review of leasing and permitting practices.
States took the administration to court last May, arguing that the order was arbitrary and capricious and violated the Administrative Procedures Act. They claimed it harmed their ability to source reliable and affordable energy and threatened billions of dollars in investment in supply chains, workforce development, and wind industry-related infrastructure.
On December 8, Judge Patti B. Saris of the U.S. District Court for the District of Massachusetts ruled in the states’ favor and vacated the offshore wind order. More specifically, the judge vacated the portion of the order directing agencies to pause permits and other authorizations. The withdrawal of areas eligible for new leases remains in effect.
The Trump administration appealed the ruling to the First Circuit in February, but never submitted an opening brief. The initial deadline was May 11, but on May 4, the DOJ requested additional time to file the brief. The judge gave the defendants until June 10. On that date, the defendants filed the motion to dismiss.
This is a developing story and we’ll update it as we learn more about the administration’s actions and their effects.
The data center water issues are real – but they aren’t what you think.
Too often, I hear people say the number one reason they’re against data center development is water use. Heatmap’s data shows water consumption is historically the reason cited most often by activists when opposing projects. This complaint, they often say, is rooted in the fear that this nascent buildout of AI infrastructure will simply draw so much H2O it will leave little liquid left for the rest of us.
I spent weeks trying to understand how real the water use problem is when it comes to data centers, reading research and speaking to some of the world’s leading academics, large tech firms, and environmental advocates to make my best attempt at answering some of the most important questions being asked about data centers.
Before I jump into this thicket, a few caveats. I’m not going to address the host of water pollution concerns many have raised about data centers because that is for a future article. If you want me to dissect how Rep. Alexandria Ocasio-Cortez got a jar of dirty water near a Meta data center, that was poor construction practices – not a data center’s water demand. By that same token, if you're itching for me to find out how much PFAS is in data center water, I’m not delving into that here, though I’ll just say PFAS is everywhere and isn’t a data center-specific issue.
So are there problems with AI data centers’ water use? Yes. Are data centers using too much water for society to handle? It depends on what “too much” means to you. Is the AI data center boom going to usher in a new era of drought across the United States? Probably not, but there’s a few places we should be mindful of.

Researchers told me data center water use is a painfully understudied topic rendered more obscure by a lack of public information about individual H2O consumption at the project level. Those I spoke to were split on how seriously to take the topic.
Some analyses insist the sector’s water use should be regulated and tackled head-on by the sector. I spoke with Yi Ding, an assistant professor at Purdue University, who co-authored a paper laying out a framework for evaluating the water impact of computing weighted specifically for water stress. Ding told me there is currently no set of industry-led best practices for sustainable water-conscious data center operation and her work aims to fill that gap.
When I asked Ding if data centers are actually threatening individual towns’ water supplies, she didn’t hesitate: “Yes, it’s significant.”
Others in this field have the opposite view.
“Water is often brought up as the primary concern when it’s less important,” David Mytton, a sustainable computing researcher at Oxford University, told me. “The more important thing is going to be how you bring more clean energy onto the grid, and nuclear power, so that we can generate sufficient energy to build these centers.”
Large tech companies are starting to spend less time debating the extent of the problem and more bandwidth addressing the PR crisis surrounding data center and AI water use.
Ben Townsend, Google’s head of infrastructure and sustainability, told me he believes that “from a comms and PR perspective” he has “no doubt” it would be easier to build data centers without the debate over water. “Data centers operators are not explaining why they’re using water or how much water they use. There’s a complete lack of transparency or discussion.”
Google has been getting splashy around this topic, a public relations strategy that reminds me of Meta’s recent workforce training investments. Last week, Google announced five fresh “commitments” towards its “climate-conscious approach” to water use, including a pledge to “replenish more water than we consume at our sites” by 2030.
This week, Amazon made a similar declaration and claimed its operations are 75% of the way to accomplishing this goal, which it’s calling “water positive.” Brandon Oyer, director of energy and water at Amazon Web Services, told me he thinks the industry “could’ve done better” and “come out earlier” to address its water use.
“There’s just been a lot of misinformation that has led people to [be] a little bit alarmist. And rightfully so. I would get alarmed if I thought that water was going to be impacted in my community,” Oyer said.
The basics of data center water use
Data centers need water to cool large server racks whizzing away to power AI and most other internet practices, from streaming to online banking. Normally, you don’t want computers to get too hot because then they can crash causing potentially catastrophic harm to the machine.
This water use presents a number of environmental challenges. Often, server farms rely on clean, fresh water, or filtered drinking water, a need largely for functionality reasons. They’re competing for this resource at a time when supply is dwindling amidst the crisis of global warming.
Making matters worse, much of the U.S. has faced drought conditions over the past year, including states that are typically water abundant, like Virginia and Georgia, that are at the center of the data center boom. On Monday, The Guardian reported that more than half of all planned data centers in the U.S. are in “locations that have been in drought conditions throughout the past year,” citing data center site information from federal agencies and the energy data firm Cleanview.
In the top data center destination of Texas, where peak electricity demand could more than quadruple in the near future, analysis from state university researchers released in May found data centers could wind up between 3% to 9% of water demand by 2040. Projects are being developed near cities like Corpus Christi and El Paso that were already fearful their drinking water supplies would dry up before the AI infrastructure boom came to town.
“The impact of building a data center in Arizona versus Wyoming is very different,” said Ding, the Purdue University researcher. “[Companies] will say different things because of their position. The problem is substantial and sometimes it’s not that they don’t want to use water – it means they don’t have water to use.”
The most water intensive version of data center cooling is called “evaporative cooling,” which mixes water evaporation and ventilation air flow to cool rooms in ways industry compares to human sweat. Evaporative cooling uses a lot of water and regular fresh supply because, well, the water goes away once it evaporates.
One Google data center using evaporative cooling in Council Bluffs, Iowa used more than 1 billion gallons of water in 2024, a stat that made the project a poster child for perceived excesses in water use. Somewhat ironically, we know this because Google is one of the few large tech companies to voluntarily disclose direct water consumption from individual data centers on an annual basis.
But cooling tech is becoming much more water efficient. You may have heard of “closed loop cooling” – that’s when a chilling system is supposedly self-contained. These systems as designed typically rely on loops of pipes filled with coolant flowing through them. This means they should not expel much liquid. If the modern trend in data center development skewed towards closed-loop systems, it would theoretically mean very little new water supply drawn on the average day.
“If you’re using a closed loop system, the water goes into the data center and then it doesn’t really require a refill every so often. It’s a one-time thing,” Mytton said. “If you’re using evaporative cooling, the water is continuously evaporating into the atmosphere. That’s when it’s being drawn from water sources.”
Closed-loop systems aren’t perfect because of ordinary issues like leaks. These flaws have meant this innovation has done little to assuage the loudest local concerns about water use. Critics of the sector have pointed to estimates pegging a closed-loop failure rate up to 25%. But Mytton said this criticism against closed-loop cooling systems is a little misguided. “They’re just wrong. They just don’t understand how data centers work.”
Closed loop systems and water-free cooling processes (like simple air vent-based cooling) also have trade-offs, particularly the extra energy and chemicals required to make these loops work to spec. Given data center developers are often choosing gas-fired power, which also requires water and produces greenhouse gas emissions, more power for less water is hardly a comfortable trade-off from an environmental perspective.
“‘Closed-loop cooling’ is a marketing gimmick,” proclaimed anti-data center group Food and Water Watch in an April blog post, calling the practice “greenwashing” and “just clever advertising.”
We do not know right now how much water most data centers are actually using, sans a handful of companies reporting individual facility use like Google. The data center development space – Big Tech, their subsidiaries, start ups, real estate firms – is mostly keeping their individual facility water usage private, and there isn’t really any regulation at any level of government to compel this information to be released in the United States, despite it being the number one destination for data center development. Corporations often consider these figures proprietary and municipal governments often consider this confidential business information, making it likely to be redacted or withheld from public records requests.
For example, in Wisconsin, an environmental group sued the city of Racine when officials refused to give water use projections for Microsoft’s data center campus in the nearby village of Mount Pleasant, about five miles from the shores of Lake Michigan. The projections were ultimately released under court order, showing Microsoft’s data center campus was projected to use up to 234,000 gallons of water on peak days or up to 2.8 million per year; eventually those numbers could almost triple to 702,000 gallons on peak days, or almost 8.5 million gallons a year.
These projections, according to Microsoft, are for a facility where more than 90% of the facility will rely on closed-loop cooling. The rest of the data center campus “will use outside air for cooling, switching to water only on the hottest days.” The company has called this design a “technological milestone” that’ll use “roughly the amount of water a typical restaurant uses annually.”
Microsoft is accurate here: the average eatery uses roughly 250,000-to-300,000 gallons of water a year according to restaurant sustainability advocates, a level of consumption that’s led restaurants to be roughly 15 percent of total water use in commercial facilities in the United States.
Personally I think it is easier and more useful to compare a data center to a farm, especially given how many are fighting to stop these projects to preserve prime farmland. Agriculture doesn’t measure water consumption by the gallon; farms use far too much water for those stats to work here. Instead farms use acre-feet, which is calculated using the volume of water necessary to entirely cover an acre of land with one foot of water. For posterity, one acre-foot is almost 326,000 gallons of water, which is about the maximum daily water consumption of that Microsoft data center in Mount Pleasant, Wisconsin. In 2023, the average amount of water applied to a single acre of farmland for irrigation was 1.5 acre-feet, rendering this figure comparable to a large Microsoft data center. This is still a lot of water and not a 1:1 comparison, since different crops require water at different times. But even if a data center consumed that much water every day for a full year, that’s 365 days. An average large farm is a little more than 1,400 acres and many farms span far more acreage. That’s the sort of relative scale we’re working with. So, for instance, a large family farm in Stafford County, Kansas, might use something like 420 million gallons of water over roughly 1,000 irrigated acres of corn in an average year.
I’m no farming expert – there might be things about farmland irrigation I don’t necessarily understand. But it's hard for me to look at these numbers and not long for some sort of rethinking about how we’re doing water math with data centers, especially given the environmental trade-offs around using less water.
Honestly I don’t think trying to explain this math helps anymore because secrecy may have spoiled the well in Racine, pun intended. In September, a peer-reviewed study by University of Wisconsin researchers found the Mount Pleasant datacenter had become “a microcosm of a macro problem with secrecy.” The paper stated that while closed-loop systems at the Mount Pleasant facility “may significantly reduce water use during some of the year, there is still a question of transparency and why it has been so difficult to obtain clear answers about water use.” Full transparency around water use, as well as the energy required for water-lite cooling practices, would be “essential” for any future research into industry practices “to have credibility,” the study stated.
Asked for comment on the study, a Microsoft spokesperson said via email: “Our datacenter campus in Mount Pleasant leverages the latest and most innovative cooling technology available. In past datacenter designs, water has played a key role in datacenter cooling and humidification, but our new designs aim to eliminate this continuous need for municipal water for cooling. The bottom line is that this data center, and others we build in the future, will not require massive amounts of water.”
When you zoom out further, water use by sector shows that U.S. data centers are not the leading driver of water use and its scarcity to date. Thermal power (fossil energy) and agriculture are by far the largest users of water in the U.S. economy, and it would be challenging for the data center industry to ever catch up. Industry figures collected in 2015 found thermo-electric power used roughly 132.4 billion gallons of water per day. Irrigation was a close second at 118 billion gallons of water daily. By comparison, researchers have noted International Energy Agency estimates that the entire global data center sector consumed a comparable amount of water during all of 2023. These are pre-AI boom numbers, but they tell us a lot about relative scale.
However, once again, researchers, tech companies, and advocates alike all told me they believe this macro picture elides individual communities and transparency issues are rendering these comparisons unhelpful for calming concerns down. The data center conflicts are local matters felt acutely, especially in places where drinking water is either hard to come by or expensive. Your average rural desert town or midwestern farming district cares little about the world; they want to know if their own wells will run dry. As Amazon’s Oyer told me, “The hyperlocal influence you can have on a water supply is why it becomes top of mind for people.”
One way to measure data center water impacts in aggregate may be to quantify the potential infrastructure upgrades necessary to meet the industry’s demand. A new study by researchers at University of California-Riverside and CalTech found that new water infrastructure spending for data centers alone could total as much as $58 billion in only four years time. These upgrades will be necessary in order for municipal water supplies to withstand peak demand on the hottest days of the year, a need akin to grid resilience upgrades. Not to mention our nation’s sewer systems are in desperate need of upgrades.
“If a data center was able to show they weren’t stripping our water resources and convinced a community they have mitigation strategies at the local level, that’s a theoretical path,” said Kathryn Hoffman, executive director of the Minnesota Center for Environmental Advocacy. Her organization has successfully stalled data center projects in the state with lawsuits arguing city and county environmental reviews are failing to account for the full extent of local resource usage, including water.
“Unfortunately, we’re a long way from that,” Hoffman added.
And more of this week’s biggest news around project fights.
1. Matagorda County, Texas – The bipartisan data center backlash is now so powerful that a top Republican Texas state official is doing an event with the Democrat vying to replace him.
2. Albany County, New York – As we await Gov. Kathy Hochul’s decision on whether to enact the nation’s first statewide moratorium on data centers, I wanted to bring up some pretty crucial facts about the situation in the Empire State.
3. Davidson County, Tennessee – Anyone who’s anyone should be talking about Nashville.
4. Lehigh County, Pennsylvania – I’m used to eagles halting wind turbines, but now people are trying to use the birds to stop data centers.
5. Laramie County, Wyoming – We had another anti-wind rally backed by national conservatives, this time in Wyoming.
6. Ellis County, Kansas – Let’s end on a sweet note: a giant solar farm getting its permits.