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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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But this might all be moot thanks to the “major questions doctrine.”
Could President Trump’s expansive interpretation of the International Emergency Economic Powers Act empower a future president to, gasp, tariff carbon intensive goods?
That’s the terrifying prospect Justice Neil Gorsuch, a staunch conservative who often votes in line with Trump and his administration’s positions, raised to Solicitor General D. John Sauer in Wednesday’s oral arguments in the federal court case seeking to throw out Trump’s tariffs.
In a series of questions designed to draw out what limits Sauer thought existed on executive power, Gorsuch asked, “Could the president impose a 50% tariff on gas-powered cars and auto parts to deal with the unusual and extraordinary threat from abroad of climate change?” (This echoed the language of the statute the Solicitor General cited to justify the tariffs.)
“It’s very likely that could be done,” Sauer conceded.
“I think that would have to be the logic of your view,” Gorsuch replied.
“Obviously this administration would say that’s a hoax, this is not a real crisis,” Sauer said.
“I’m sure you would,” Gorsuch said to chuckles.
“But that would be a question for Congress, under our interpretation, not the courts,” Sauer said.
Gorsuch’s questioning touched on the “major questions doctrine,” first propounded in the court’s 2022 opinion in West Virginia v. Environmental Protection Agency. In that case, which resulted in the court striking down the Obama-era Clean Power Plan power plant regulations, the conservative majority argued that “given both separation of powers principles and a practical understanding of legislative intent, the agency must point to ‘clear congressional authorization’ for the authority it claims,” which it claimed the rules lacked.
In a note to clients following the emissions rules case, the white shoe law firm Davis Polk wrote that the majority opinion “does not provide guidance for applying the major questions doctrine in future cases,” but noted that a concurrence authored by Justice Gorsuch “attempted to provide such guidance for future cases.” In said concurrence, Gorsuch wrote that the major questions doctrine could be invoked when the executive branch is dealing with a question of “great political significance” or “a significant portion of the American economy.”
Hmm!
Some progressives flagged this aspect of the tariffs case as it worked its way through the courts, pointing out that it could call into question powers that future presidents may want to use to implement expansive industrial policy, including climate policy. Some of the broader legal arguments against the tariffs, Todd Tucker of the progressive Roosevelt Institute wrote in a brief, “tilt the scales overwhelmingly against progressive priorities.”
“Limits on Trump today will bind future presidents tomorrow. This could include centrists, progressives, MAGA types, or traditional conservatives, who will need or want robust executive tools to address ruinous competitiveness or climate emergencies.”
But in pursuit of their clients’ interests, advocates for striking down the tariffs were more than happy to pick up the thread dropped by Gorsuch to make libertarian-leaning arguments about presidential powers.
“It is simply implausible that in enacting” the International Emergency Economic Powers Act, the law Trump has used to justify his retributive import taxes, “Congress handed the president the power to overhaul the entire tariff system and the American economy in the process, allowing him to set and reset tariffs or any and every product from any and every country at any and all times,” Neal Katyal, the lawyer arguing on behalf of a beer and wine distributor and a longtime figure in Democratic legal circles, said in his oral argument.
Perhaps seeking to appeal to the Republican majority on the court, Katyal returned to Justice Gorsuch’s climate change example, arguing that “if the government wins, another president could declare a ’climate emergency’ and impose huge tariffs without floors or ceilings, as Justice Gorsuch said.”
“My friend’s answer,” Katyal said, referring to Sauer, “is, ‘This administration would declare it a hoax.’ The next president may not quite say that.”
Many legal experts thought that the administration got the worse of the oral arguments and questioning of the attorneys, with conservative Justices Gorsuch and Amy Coney Barrett and Chief Justice John Roberts all asking skeptical questions of Sauer, while Justices Clarence Thomas and Samuel Alito repeatedly threw the White House argumentative lifelines, including, in Alito’s case, suggesting other laws that could justify the tariffs.
Alito even gently mocked Katyal, a Democrat who served as acting solicitor general in the Obama administration, for blatantly using conservative-tinged legal arguments about the scope of executive authority over the economy.
“I wonder if you ever thought that your legacy as a constitutional advocate would be the man who revived the non-delegation argument,” referring to the idea that certain powers are too much akin to lawmaking to delegate to the executive branch, which in theory could vastly restrict the authority of regulators.
But Katyal resisted the implied contradiction and persisted in targeting the right wing of an already conservative Supreme Court.
“Heck yes,” Katyal said. “I think Justice Gorsuch nailed it on the head when saying that when you’re dealing with a statute that is this open-ended — unlike anything we’ve ever seen.”
On Massachusetts’ offshore headwinds, Biden’s gas rules, and Australia’s free power
Current conditions: The Pacific Northwest is getting blasted with winds of up to 70 miles per hour • Heavy snow is coming this week for the higher elevations in New England and upstate New York • San Cristóbal de La Laguna in the Canary Islands saw temperatures surge to 95 degrees Fahrenheit.

Democratic candidates swept to victory in key races with implications for climate change on Tuesday night. In Virginia, Democrat Abigail Spanberger — who vowed to push forward with offshore wind, new nuclear reactors, and fusion energy — seized the governor’s mansion in the first major race to be called after polls closed. In New Jersey, Democrat Mikie Sherrill, who campaigned on building new nuclear plants and pressing the state’s grid operator, PJM Interconnection, to cut electricity prices, trounced her Republican opponent. In New York City, Democrat Zohran Mamdani, who said little about energy during his campaign but came out in the last debate in favor of nuclear power, easily beat back his two rivals for Gracie Mansion. Yet the Georgia Public Service Commission's incumbent Republican Tim Echols lost his race against Democrat Alicia Johnson, a defeat for a conservative who championed construction of the only two nuclear reactors built from scratch in modern U.S. history. In what one expert called a sign of a “seismic shift” on the commission, Peter Hubbard, another Democrat running to flip a seat on the commission, also won.
At a moment when the Trump administration is “disassembling climate policy across the federal government,” Heatmap’s Emily Pontecorvo wrote, “state elections are arguably more important to climate action than ever.”
A federal judge in Washington ruled Tuesday that the Trump administration can reconsider the Biden-era approval of SouthCoast Wind off the coast of Nantucket, Massachusetts. The decision, reported in The New York Times, is a setback for the joint venture between EDP Renewables and Engie, and handed the White House a victory in what we’ve called here the administration’s “total war on wind.” Judge Tanya S. Chutkan of the U.S. District Court for the District of Columbia ruled that the project developers would not “suffer immediate and significant hardship” if the Department of the Interior’s Bureau of Ocean Energy Management were allowed to reevaluate the project’s construction and operation permits.
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Meanwhile, the U.S. Court of Appeals for the D.C. Circuit upheld Biden-era Department of Energy efficiency rules for gas-fired residential furnaces and commercial water heaters in a ruling that rejected the gas industry’s challenge on Tuesday. “Overall, we find that DOE’s economic justification analysis and conclusions were robust,” the panel ruled, according to Bloomberg Law. The decision will maintain the status quo of how the agency enforces energy efficiency rules for the appliances. Under standards updated in 2021 and 2023, the Biden-era bureaucrats proposed raising efficiency levels to 95% for furnaces and using condensing model designs to heat water.
White House budget officials pressed the Environmental Protection Agency to expand its rollback of tailpipe regulations this summer as the agency sought to repeal the foundational policy that undergirds federal climate rules, E&E News reported. Documents the green newswire service obtained showed the White House Office of Management and Budget pushed the environmental regulator to weaken limits on vehicular pollution, including soot and smog-forming compounds in addition to planet-heating carbon. The EPA initially pushed back, but the documents revealed the staffers at OMB demanded the agency pursue a more aggressive rollback.
Australia launched a new plan to force energy companies to offer free electricity to households during the day to use excess solar power and push the grid away from coal and gas. The policy, called the “Solar Sharer” plan, aims to take advantage of the country’s vast rooftop solar panels. More than 4 million of Australia’s 10.9 million households have panels, and the capacity has overtaken the nation’s remaining coal-fired power stations. The proposal, the Financial Times reported, would also extend the benefits of distributed solar resources to the country’s renters and apartment dwellers.
For years, nuclear scientists have dreamed of harnessing atomic energy from thorium, potentially shrinking radioactive waste and reducing the risk of weapons proliferation compared to uranium. In the West, that has remained largely a dream. In China, however, researchers are vaulting ahead. This week, Chinese scientists announced a major breakthrough in converting thorium to uranium in a reactor. “This marks the first time international experimental data has been obtained after thorium was introduced into a molten salt reactor, making it the only operational molten salt reactor in the world to have successfully incorporated thorium fuel,” Shanghai Institute of Applied Physics of the Chinese Academy of Sciences said in a statement.
Rob and Jesse touch base with WeaveGrid CEO Apoorv Bhargava.
Data centers aren’t the only driver of rising power use. The inexorable shift to electric vehicles — which has been slowed, but not stopped, by Donald Trump’s policies — is also pushing up electricity use across the country. That puts a strain on the grid — but EVs could also be a strength.
On this week’s episode of Shift Key, Rob and Jesse talk to Apoorv Bhargava, the CEO and cofounder of WeaveGrid, a startup that helps people charge their vehicles in a way that’s better and cleaner for the grid. They chat about why EV charging remains way too complicated, why it should be more like paying a cellphone bill than filling up at a gas station, and how the AI boom has already changed the utility sector.
Shift Key is hosted by Robinson Meyer, the founding executive editor of Heatmap, and Jesse Jenkins, a professor of energy systems engineering at Princeton University.
Subscribe to “Shift Key” and find this episode on Apple Podcasts, Spotify, Amazon, YouTube, or wherever you get your podcasts.
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Here is an excerpt from our conversation:
Robinson Meyer: In your experience, are consumers willing to make this deal, where they get some money off on their power bill in order to change how their car works? Because it does seem to include a mindset change for people, where they’re going from thinking of their car as a machine — I mean, this is part of the broader transition to EVs. But there’s an even further mindset shift that seems to me like it would be required here, where you go from thinking about your car as a machine that you wholly own — that enables your freedom, that is ready to drive a certain amount of miles at any time — to a machine that enables you to have transportation services but also is one instantiation of the great big cloud of services and digital technologies and commodity energy products that surround us at any time.
Apoorv Bhargava: Yeah, I mean, look, I think we have seen faster adoption rates than any other consumer-side resource participating in energy has. So I feel very good about that. But ultimately, I think of this as a transition to the normal experience for folks who are going through what is a new experience altogether.
Again, similar to my cell phone plan, if this was just offered to me as a standard offering — you buy an EV, your utility offers you a plan, it’s called the EV plan — in the same way that we have EV time-of-use rates, quote-unquote. If you’re just offered an EV plan where it’s exactly the same thing — I’m going to make sure you’re fully charged every night in the way you want it to be charged, with the cleanest, cheapest, most reliable charging possible, and it’s just being taken care of.
I think what’s so hard for most folks to grok, is that the way this experience works is it’s supposed to be completely frictionless, right? You’re really supposed to not think about it. It’s actually only in the few moments where you need to change your 99% behavior to the 1% behavior — where you’re like, Oh, I need to go to the airport, or, Oh, I need to go on a road trip. That’s where you need to think about it. It’s flipped from thermostat management programs where you actually need to think about it actively in the moments where the grid is really strained.
Where we’ve overinvested, in my view —and this is a controversial view — we’ve overinvested in trying to make EVs be like gas stations or like the gas station model. We keep talking about it all the time. We’ve over-talked about range anxiety. The fact of the matter is 80% of charging still happens at home. Even in the long run, 30% of charging will happen in the workplace. 50- plus-percent will happen at home. It’s very little charging that’s gonna happen on fast charging. But we’ve talked so much, ad nauseam, about fast charging that we’ve actually forgotten that underpinning the iceberg of the electrification cost is the grid itself. And never before has the grid been so strained.
Mentioned:
Rob on how electricity got so expensive
Utility of the Future: An MIT Energy Initiative response to an industry in transition, December 2016
Previously on Shift Key: Utility Regulation Really Sucks
Jesse’s downshift; Rob’s upshift.
This episode of Shift Key is sponsored by …
Hydrostor is building the future of energy with Advanced Compressed Air Energy Storage. Delivering clean, reliable power with 500-megawatt facilities sited on 100 acres, Hydrostor’s energy storage projects are transforming the grid and creating thousands of American jobs. Learn more at hydrostor.ca.
Uplight is a clean energy technology company that helps energy providers unlock grid capacity by activating energy customers and their connected devices to generate, shift, and save energy. The Uplight Demand Stack — which integrates energy efficiency, electrification, rates, and flexibility programs — improves grid resilience, reduces costs, and accelerates decarbonization for energy providers and their customers. Learn more at uplight.com/heatmap.
Music for Shift Key is by Adam Kromelow.