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Five years from the emergence of the disease, the world — and the climate — is still grappling with its effects.

Five years ago this month, the novel coronavirus that would eventually become known as Covid-19 began to spread in Wuhan, China, kicking off a sequence of events that quite literally changed the world as we know it, the global climate not excepted.
The most dramatic effect of Covid on climate change wasn’t the 8% drop in annual greenhouse gas emissions caused by lockdowns and border closures in 2020, however. It wasn’t the crash in oil prices, which briefly went negative in April 2020. It wasn’t the delay of COP26 and of the United Nations Intergovernmental Panel on Climate Change’s Sixth Assessment Report. And it wasn’t, sadly, a legacy of green stimulus measures (some good efforts notwithstanding).
Rather, it was in the way the world’s governments (especially the largest and most powerful) responded to the virus, which undermined the very idea of multilateralism, climate action included. This took place along three main vectors: inertia on global financial rules, even as long-acknowledged failings turned catastrophic; a renaissance in industrial policy that may prove transformative for domestic fiscal policy; and, at the intersection of both, deterioration of what we might call geopolitics or “global solidarity.”
Evidence of this phenomenon can be found in nearly every aspect of the global order. The World Bank in October pointed to Covid as chief among a “polycrisis” of “multiple and interconnected crises occurring simultaneously, where their interactions amplify the overall impact.” Development gains have almost slowed to a halt. Extreme poverty has increased overall in low-income countries since 2014, after decades of improvement, according to the World Bank’s analysis.
None of this, however, was an inevitable effect of Covid. Poor countries got poorer, for the most part, because of norms and hard rules in global finance that they have little control over — what a group of researchers last year termed “financial subordination.”
To understand why, a brief history: Developing countries during the 2010s were seeking new avenues of finance as traditional sources like multilateral development bank loans, official development assistance, and commercial bank loans waned. Many turned to the U.S. dollar sovereign bond markets, and also to China; a few countries also turned to commodity traders like Glencore and Trafigura, taking on opaque debts to be repaid with their own oil and other commodities.
When the pandemic response shut down many kinds of economic activity in 2020, what World Bank researchers called a “fourth wave” of debt followed. After a continuous series of debt surges from 1970 to 1989, 1990 to 2001, and 2002 to 2009, global debt markets had been relatively stable for the preceding decade. What was different about this fourth wave was that it was largely in developing countries.
With Covid, the fourth wave turned into a tsunami. Countries everywhere were paralysed by the pandemic, but the poorest ones lost critical revenue from tourism, remittances, and some exports. On top of that, they suffered the same lockdowns and illness that depressed local economic activity and drained government budgets in many countries. Unlike rich countries, developing countries had limited ability to dip into reserves or raise money from the bond markets to keep their citizens safe and tide over those who lost work.
Wealthy countries and lenders did little to ameliorate this stress. A “Debt Servicing Suspension Initiative” facilitated by the G20 provided some relief for 46 countries; China participated, too, granting deferrals to some of its debtor countries. But private bondholders (who were earning returns as high as 9%) and multilateral banks did not. The debts still had to be paid, and by 2023, aggregate net capital flows were negative for developing countries — that is, more money flowed from poorer countries to richer ones than the other way around.
Numerous governments defaulted on their debts in the wake of Covid, including Ghana, Sri Lanka, Zambia, Ethiopia, and Suriname. But perhaps just as bad, many, many more countries continued to pay their debts by slashing their health and social welfare budgets just as they were needed most. Low- and middle-income countries spent more on debt servicing in 2022 than they spent on health in 2020, during the height of the pandemic.
Tensions between the U.S. and China, meanwhile, became even more overt around Covid, helped in part by accusations and recriminations over the source of the disease. The two great powers were themselves deeply changed. China emerged from its Covid Zero measures with public discontent at a nearly unprecedented pitch and its engines of economic growth — domestic infrastructure and residential property — faltering as vast local government debts became unmanageable. The country’s central government renewed its focus on an export-led growth model, but this time instead of cheap, low-tech consumer goods, it was semiconductors, solar panels, and electric vehicles.
It quickly became clear that the Biden administration would not be much less hawkish towards China than Trump’s was. It largely focused inwards, on tackling the disenfranchisement of formerly solid Democratic working class constituencies that Trump had exploited and Covid deepened. These were largely seen as an outcome of untrammelled free trade — especially with China. But Covid lockdowns and the rush to regain normalcy in the re-opening choked complex supply chains and logistics networks, driving up prices around the world and helping to spark a global inflation crisis that has yet to meaningfully abate in many parts of the world.
When Russia invaded Ukraine, energy prices shot up, particularly in those countries reliant on imported oil and natural gas. This shook the global fossil energy economy. Exports of liquified natural gas by the United States to Europe skyrocketed, as European countries desperately sought alternatives to Russian piped gas. Those same desperate Europeans also bought LNG shipments that had been bound for countries like Bangladesh and Pakistan, outbidding the poorer countries which then endured blackouts and further hits to their financial reserves as they struggled to match the new EU price.
Global energy price rises compounded the Covid supply-chain pressures and monetary policymakers decided hiking interest rates was unavoidable. While Russian troops tried to capture Kyiv in March of 2022, the U.S. Federal Reserve — perhaps the most powerful U.S. entity for the rest of the world — began hiking interest rates, taking them from just a quarter of a percent before the invasion to more than 5% by mid-2023. This strengthened the U.S. dollar, heaping more pressure on developing countries trying to pay dollar-denominated debts. Meanwhile, in rich and poor countries alike, the jump in living costs has helped drive backlashes against incumbents, and a surge in far-right populism.
Perhaps years ago, if we’d known that we’d see a spike in temperatures, droughts, and storms alongside a flood of cheap solar panels and EVs, technological breakthroughs in batteries, and a renewed interest in industrial policy, it might have seemed that more urgent climate action was assured. Instead, divisions have worsened. The agreement text from this year’s United Nations climate conference is actually slightly watered down from the last year’s statement on fossil fuel phaseout. A special conference on biodiversity Cali, Colombia, finished last month only when delegates had to catch flights home, and a desertification conference hosted by Saudi Arabia finished this month with no group statement.
Rachel Kyte, the UK special envoy for climate change, told an event hosted by the Overseas Development Institute think tank that even as it approached its 10-year anniversary, the 2015 Paris Agreement was more fragile than it had ever been. Countries like the UK, she said, had been inflicting “paper cuts” on developing countries for so long that the ill will was becoming impossible to wave away.
“[W]e’ve also cherry-picked which international laws we want to stand behind and then, which conflicts we believe the international law is important for and not,” she added. “And you sit in the climate negotiations and they know that you know that they know that you know.”
And yet a hopeful note sounding out of all of this has been the central role of clean energy in many countries’ responses to the increasingly fractious global landscape. Responses to Covid, as chaotic as they were, demonstrated that governments can take decisive action. Although the vast majority of Covid stimulus was climate-neutral at best; about a trillion dollars’ worth of investments really were green. Efforts to boost cycling gained ground in some cities, including in Paris, where bike trips now outnumber car trips in and around the city center.
Renewed interest in energy security sparked by the Ukraine invasion has been largely supportive of clean energy. Europe’s combined wind and solar generation rose 10% in the first year after the invasion as the bloc made its emissions reduction target more ambitious. Green industrial policy introduced by the Biden administration has encouraged other countries to see decarbonization as a competitive opportunity rather than an obligation. And China’s doubling down on its manufacturing of the “new three” — batteries, EVs, and solar panels — has created an oversupply that spurred rapid uptake of clean energy in many countries.
Fractures, however, are rife. Too many countries have steep tariffs on clean energy imports preventing them from taking advantage of cheap Chinese components, adding to other barriers to clean energy generation, such as the restrictive planning rules in Japan, where renewable energy generation lags; even wind power, where the country has ample potential, was virtually flat for the decade to 2022. Tariffs on imports to the U.S., while helping to build a domestic industry, also slow the rate of deployment. Globalized supply chains tend to be cheaper; a study in Nature estimated that they saved the U.S. up to $31 billion in the 12 years leading up to 2020, while China saved up to $45 billion, compared to a scenario in which domestic suppliers were prioritized. Even with its rapid expansion in clean tech manufacturing thanks to the Inflation Reduction Act, it will take years for the U.S. to catch up to China’s capabilities, while in the meantime, tariffs will slow down installations.
For those in wealthier and more powerful countries, there’s at least a chance of political shift. For countries under financial subordination, there are hard limits to what can be achieved.
Geopolitical alignment is an increasingly sensitive question for countries trying to avoid the pitfalls of appearing to be too close to either China or the U.S. Auto manufacturing has become the site of intense competition and tension, with the U.S. and EU putting punitive tariffs on Chinese EV imports to compensate for “state subsidies.” The introduction of the European carbon border adjustment mechanism this year, which penalizes high-carbon imports so they don’t undermine the continent’s carbon pricing regime, has introduced a new source of tension around trade, particularly for African countries that rely on exports to Europe and are nowhere near having their own carbon accounting scheme that is a prerequisite to avoiding the surcharges.
We may only know in retrospect, but the supply bottlenecks and inflationary surges associated with the Covid lockdowns and reopenings may have been a kind of masked transition phase into a new, more permanently supply-constrained world. Researchers at Potsdam Institute and the European Central Bank published new research in March showing that climate change impacts will raise general inflation by more than a percentage point by 2035.
The damage could be seen in the recent COP29 in Azerbaijan. Trust was close to an all-time low over negotiations for a new target for finance flows from wealthy to poor countries. After it ended with a controversially low $300 billion target, Fiona Harvey of the Guardian called it the second worst COP of the 18 she’s attended, surpassed only by the disastrous 2009 COP15 in Copenhagen, which ended with no agreement at all. It can also be seen in the rebound in emissions since 2021.
While some hopeful shifts have emerged from the Covid era, the increasingly febrile global atmosphere risks endangering our already slim chances of protecting the habitable atmosphere. As climate impacts worsen, pushing back on that axiom will be more difficult, but more urgent. Combating climate change is such a monumental undertaking that collaboration – in technology, manufacturing, knowledge, and diplomacy – will be vital.
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Atomic Canyon is set to announce the deal with the International Atomic Energy Agency.
Two years ago, Trey Lauderdale asked not what nuclear power could do for artificial intelligence, but what artificial intelligence could do for nuclear power.
The value of atomic power stations to provide the constant, zero-carbon electricity many data centers demand was well understood. What large language models could do to make building and operating reactors easier was less obvious. His startup, Atomic Canyon, made a first attempt at answering that by creating a program that could make the mountains of paper documents at the Diablo Canyon nuclear plant, California’s only remaining station, searchable. But Lauderdale was thinking bigger.
In September, Atomic Canyon inked a deal with the Idaho National Laboratory to start devising industry standards to test the capacity of AI software for nuclear projects, in much the same way each update to ChatGPT or Perplexity is benchmarked by the program’s ability to complete bar exams or medical tests. Now, the company’s effort is going global.
On Wednesday, Atomic Canyon is set to announce a partnership with the United Nations International Atomic Energy Agency to begin cataloging the United Nations nuclear watchdog’s data and laying the groundwork for global standards of how AI software can be used in the industry.
“We’re going to start building proof of concepts and models together, and we’re going to build a framework of what the opportunities and use cases are for AI,” Lauderdale, Atomic Canyon’s chief executive, told me on a call from his hotel room in Vienna, Austria, where the IAEA is headquartered.
The memorandum of understanding between the company and the UN agency is at an early stage, so it’s as yet unclear what international standards or guidelines could look like.
In the U.S., Atomic Canyon began making inroads earlier this year with a project backed by the Institute of Nuclear Power Operators, the Nuclear Energy Institute, and the Electric Power Research Institute to create a virtual assistant for nuclear workers.
Atomic Canyon isn’t the only company applying AI to nuclear power. Last month, nuclear giant Westinghouse unveiled new software it’s designing with Google to calculate ways to bring down the cost of key components in reactors by millions of dollars. The Nuclear Company, a startup developer that’s aiming to build fleets of reactors based on existing designs, announced a deal with the software behemoth Palantir to craft the software equivalent of what the companies described as an “Iron Man suit,” able to swiftly pull up regulatory and blueprint details for the engineers tasked with building new atomic power stations.
Lauderdale doesn’t see that as competition.
“All of that, I view as complementary,” he said.
“There is so much wood to chop in the nuclear power space, the amount of work from an administrative perspective regarding every inch of the nuclear supply chain, from how we design reactors to how we license reactors, how we regulate to how we do environmental reviews, how we construct them to how we maintain,” he added. “Every aspect of the nuclear power life cycle is going to be transformed. There’s no way one company alone could come in and say, we have a magical approach. We’re going to need multiple players.”
That Atomic Canyon is making inroads at the IAEA has the potential to significantly broaden the company’s reach. Unlike other energy sources, nuclear power is uniquely subject to international oversight as part of global efforts to prevent civilian atomic energy from bleeding over into weapons production.
The IAEA’s bylaws award particular agenda-setting powers to whatever country has the largest fleet of nuclear reactors. In the nearly seven decades since the agency’s founding, that nation has been the U.S. As such, the 30 other countries with nuclear power have largely aligned their regulations and approaches to the ones standardized in Washington. When the U.S. artificially capped the enrichment levels of traditional reactor fuel at 5%, for example, the rest of the world followed.
That could soon change, however, as China’s breakneck deployment of new reactors looks poised to vault the country ahead of the U.S. sometime in the next decade. It wouldn’t just be a symbolic milestone. China’s emergence as the world’s preeminent nuclear-powered nation would likely come with Beijing’s increased influence over other countries’ atomic energy programs. As it is, China is preparing to start exporting its reactors overseas.
The role electricity demand from the data centers powering the AI boom has played in spurring calls for new reactors is undeniable. But if AI turns out to have as big an impact on nuclear operations as Lauderdale predicts, an American company helping to establish the global guidelines could help cement U.S. influence over a potentially major new factor in how the industry works for years, if not decades to come.
Current conditions: The Northeastern U.S. is bracing for 6 inches of snow, including potential showers in New York City today • A broad swath of the Mountain West, from Montana through Colorado down to New Mexico, is expecting up to six inches of snow • After routinely breaking temperature records for the past three years, Guyana shattered its December high with thermometers crossing 92 degrees Fahrenheit.
The Department of Energy gave a combined $800 million to two projects to build what could be the United States’ first commercial small modular reactors. The first $400 million went to the federally owned Tennessee Valley Authority to finance construction of the country’s first BWRX-300. The project, which Heatmap’s Matthew Zeitlin called the TVA’s “big swing at small nuclear,” is meant to follow on the debut deployment of GE-Hitachi Nuclear Energy’s 300-megawatt SMR at the Darlington nuclear plant in Ontario. The second $400 million grant backed Holtec International’s plan to expand the Palisades nuclear plant in Michigan where it’s currently working to restart with the company’s own 300-megawatt reactor. The funding came from a pot of money earmarked for third-generation reactors, the type that hew closely to the large light water reactors that make up nearly all the U.S. fleet of 94 commercial nuclear reactors. While their similarities with existing plants offer some benefits, the Trump administration has also heavily invested in incentives to spur construction of fourth-generation reactors that use coolants other than water. “Advanced light-water SMRs will give our nation the reliable, round-the-clock power we need to fuel the President’s manufacturing boom, support data centers and AI growth, and reinforce a stronger, more secure electric grid,” Secretary of Energy Chris Wright said in a statement. “These awards ensure we can deploy these reactors as soon as possible.”
You know who also wants to see more investment in SMRs? Arizona senator and rumored Democratic presidential hopeful Ruben Gallego, who released an energy plan Wednesday calling on the Energy Department to ease the “regulatory, scaling, and supply chain challenges” new reactors still face.
Since he first emerged on the political scene a decade ago, President Donald Trump has made the proverbial forgotten coal miner a central theme of his anti-establishment campaigns, vowing to correct for urbanite elites’ neglect by putting workers’ concerns at the forefront. Yet his administration is now considering overhauling black lung protections that miners lobbied federal agencies to enact and enforce. Secretary of Labor Lori Chavez-DeRemer will “reconsider and seek comments” on parts of the Biden-era silica rule that mining companies and trade groups are challenging in court, the agency told E&E News. It’s unclear how the Trump administration may seek to alter the regulation. But the rule, finalized last year, reduced exposure limits for miners to airborne silica crystals that lodge deep inside lung tissue to 50 micrograms from the previous 100 microgram limit. The rule also required companies to provide expanded medical tests to workers. Dozens of miners and medical advocates protested outside the agency’s headquarters in Washington in October to request that the rule, expected to prevent more than 1,000 deaths and 3,700 cases of black lung per year, be saved.
Rolling back some of the protections would be just the latest effort to gut Biden-era policy. On Wednesday, the White House invited automotive executives to attend what’s expected to be an announcement to shred fuel-efficiency standards for new vehicles, The New York Times reported late on Tuesday.
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The average American spent a combined 11 hours without electricity last year as a result of extreme weather, worse outages than during any previous year going back a decade. That’s according to the latest analysis by the U.S. Energy Information Administration. Blackouts attributed to major events averaged nearly nine hours in 2025, compared to an average of roughly four hours per year in 2014 through 2023. Major hurricanes accounted for 80% of the hours without electricity in 2024.
The latest federal grants may be good news for third-generation SMRs, but one of the leading fourth-generation projects — the Bill Gates-owned TerraPower’s bid to build a molten salt-cooled reactor at a former coal plant in Wyoming — just cleared the final safety hurdle for its construction permit. Calling the approval a “momentous occasion for TerraPower,” CEO Chris Levesque said the “favorable safety evaluation from the U.S. Nuclear Regulatory Commission reflects years of rigorous evaluation, thoughtful collaboration with the NRC, and an unwavering commitment to both safety and innovation.”
TerraPower’s project in Kemmerer, Wyoming, is meant to demonstrate the company’s reactors, which are designed to store power when it’s needed — making them uniquely complementary to grids with large amounts of wind and solar — to avoid the possibility of a meltdown. Still, at a private lunch I attended in October, Gates warned that the U.S. is falling behind China on nuclear power. China is charging ahead on all energy fronts. On Tuesday, Bloomberg reported that the Chinese had started up a domestically-produced gas turbine for the first time as the country seeks to compete with the U.S. on even the fossil fuels American producers dominate.
It’s been a rough year for green hydrogen projects as the high cost of producing the zero-carbon fuel from renewable electricity and water makes finding customers difficult for projects. Blue hydrogen, the version of the fuel made with natural gas equipped with carbon capture equipment, isn’t doing much better. Last month, Exxon Mobil Corp. abandoned plans to build what would have been one of the world’s largest hydrogen production plants in Baytown, Texas. This week, BP withdrew from a blue hydrogen project in England. At issue are strict new standards in the European Union for how much carbon blue hydrogen plants would need to capture to qualify as clean.
You’re not the only one accidentally ingesting loads of microplastics. New research suggests crickets can’t tell the difference between tiny bits of plastics and natural food sources. Evidence shows that crickets can break down microplastics into smaller nanoplastics — which may be even worse in the environment since they’re more easily eaten or absorbed by other lifeforms.
Jesse and Rob take stock of 2025.
2025 has been incredibly eventful for decarbonization — and not necessarily in a good way. The return of Donald Trump, the One Big Beautiful Bill Act, and the rise of data centers and artificial intelligence led to more changes for climate policy and the clean energy sector than we’ve seen in years. Some of those we saw coming. Others we really did not.
On this week’s episode of Shift Key, Rob and Jesse look back at the year’s biggest energy and decarbonization stories and examine what they got right — and what they got wrong. What’s been most surprising about the Trump administration? Why didn’t the Inflation Reduction Act’s policies help prevent the law’s partial repeal? And why have AI and the data center boom become a much bigger driver of power growth than we once thought?
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, or wherever you get your podcasts.
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Here is an excerpt from our conversation:
Jesse Jenkins: I think what I’m saying on the organizing side is that all of the organizing and comms effort was going in, as you pointed out, to a base-building and turnout strategy, not a constituency-expanding, coalition-building strategy, right? The effort was to go deep, not wide.
I think that was the fundamental mistake because there wasn’t a lot of depth there. There wasn’t this big, untapped pool of youth voters waiting to be turned out. And it meant we put basically no effort into expanding the broad set of constituencies that, for various ideological backgrounds and various motivations, could have all agreed that hey, bringing manufacturing jobs back to America finally after 20 years of politicians talking about it is maybe a good thing we want to sustain. Hey, lowering energy prices by building new energy supplies at a time when demand is growing, that’s a good idea, maybe we should sustain that, right? Creating tax bases in rural areas through investment in solar farms and wind farms — maybe that’s a good thing we should sustain.
Politics isn’t about getting everybody to agree on motivation, right? It’s about getting people to agree on what we’re going to do as a body politic. And unfortunately, that’s what I guess I’m getting at by this hyperpartisan, ideologically-driven world is, now it is all about getting everybody to agree on motivations, and —
Robinson Meyer: That’s what I was going to say. I actually think it’s —
Jenkins: And that’s just a terrible way to make policy. And I guess it makes this all that much harder.
Meyer: I think for me, I fear we’ve run the climate base experiment so well now that people have gotten this message, and people are starting to understand these policies in terms of energy affordability or clean energy policy. And that means lots of good things for clean energy. I think people should keep making the argument because it seems to me to be true that, for instance, the One Big Beautiful Bill Act’s termination of the wind and solar tax credits is going to mean bad things for American electricity customers. It’s going to raise rates.
But I do think that we should take the full lesson of the IRA experience and say, look, if people care about affordability and you tell them you’re working for affordability, you actually do need to put affordability at the center of your policies. And you need to be willing to understand that there is a tradeoff between affordability and emissions, but unfortunately, the electorate might care about affordability.
Mentioned:
From the Shift Key archive: A Skeptic’s Take on AI and Energy Growth, with Jonathan Koomey
The R2 Is the Rivian That Matters
Ford, Hyundai US sales down slightly in November as EVs drag
Jesse’s upshift; Rob’s sorta upshift.
Music for Shift Key is by Adam Kromelow.