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Experts explain what you can do about the smoke engulfing the East Coast and Midwest.
Canadian wildfire smoke has descended upon large swaths of the Midwest and Eastern United States this week, and as of publication tens of millions of Americans are living under air quality alerts warning them not to go outside. As my colleague Jeva Lange writes, the air in New York City today is reminiscent of a time before the Clean Air Act existed.
Wildfires, for the most part, have historically been the purview of the West; East Coasters, accustomed to hurricanes and blizzards, have mostly managed to avoid the fallout from forest fires. That’s not quite so true anymore, and this week’s smoke is a likely preview of how things will work in the future. So how should people react when smoke makes its way to their cities?
To find out, I called up two doctors from Harvard’s T.H. Chan School of Public Health: Francesca Dominici, professor of biostatistics, population, and data science; and Kimberly Humphrey, an emergency physician and a fellow at the school’s Center for Climate, Health, and the Global Environment. I spoke separately to Dominici and Humphrey; our conversations have been combined and edited for length and clarity.
Dominici: I think the way to think about it is not to be overly panicking, but maybe it’s a day to not spend hours outside exercising. For people that have compromised immune systems or existing respiratory or cardiovascular diseases, it would be good to limit outdoor exposure as much as possible. So don't panic but be cautious.
Humphrey: Smoke from wildfires is a complex mixture of things. The thing about wildfires is they can burn anything. If a house is burning, for example, you have really complex mixtures of whatever is in that house that’s going into the air.
The one that we really worry about is the fine particles, which are known as PM 2.5 (i.e. particles smaller than 2.5 micrometers). They’re very little particles that people breathe in which have really significant impacts on heart and lung function, particularly in people who have chronic health conditions. But the impacts are still significant for people who are healthy previously and have no underlying health problems. It can cause coughing, wheezing, difficulty breathing, eye irritation, and short-term issues with lung function, even in people who don’t have any previous problems with their lungs.
Dominici: It’s not like walking by, for example, a construction site. You can see that dust, and those are not small particles. Those are coarse particles that make you cough or sneeze or bring tears to your eyes. That’s actually good, because you’re basically filtering them out. But these small particles, you don’t feel them. They penetrate very deep into the lungs, and then they cause inflammation that makes our immune response less effective.
Dominici: We know that these exposures to high-level fine particulate matter have both an immediate effect and a very acute effect. So we see an increase in, for example, hospital admissions, which go up the same day and the day after. But there have also been lots of studies that have documented that this effect can last for a very long time. We see chronic effects including effects on cognitive function like an exacerbation of dementia and Alzheimer's disease.
Humphrey: The first thing we would say is stay inside, shut your windows, stay away from the smoke, maybe buy an air purifier, exercise indoors.
But one of the tricky things with giving this kind of advice is that wildfire smoke affects people who are from disadvantaged socioeconomic communities more predominantly. And those are often the people that can't do the things that we would recommend to protect their health. For instance, many people have to go out to work or may be sleeping rough or have housing insecurity, and they don't have access to well-structured houses that protect them against wildfire smoke. So there's a real inequity there about the ability for people to follow the advice to keep themselves safe.
Dominici: You can totally take your dog for a walk or your kid to the playground, but if your child has asthma that’s something to watch out for. Maybe don’t spend hours outside, and make sure you have their asthma medications. People with pre-existing conditions should contact their primary-care physicians and discuss if they should potentially change their medication dosage to make sure their exposure to smoke doesn’t exacerbate whatever problem they have.
Humphrey: We’re seeing health impacts at levels below what the EPA recommends as safe levels of PM 2.5 exposure, so when our apps say “sensitive people” it’s probably actually a message for all of us. It’s important, I think, for people who call themselves healthy to understand that you can be a marathon runner and any exposure to wildfire smoke is going to have some kind of impact on you.
Humphrey: It’s very similar to COVID, so cloth masks and surgical masks offer some protection, they’re better than nothing, but they’re not as good as N95 masks. We’d recommend a really high-quality mask like an N95 because it does filter out those very, very tiny particles and offers really good protection.
Humphrey: I think we have the tools. What’s missing is education. So many people have access to air quality data, it’s on an app or on the internet, but they need more education about what to do with it. I’m very, very concerned with the socioeconomic inequities in particular. It’s a lot of the same issues as COVID: All of these issues are really, really hard to solve but are part of this whole piece.
Dominici: In a certain way, COVID has been a wake-up call. We are much more cautious about what’s in our air. I think it’s always important to keep in mind that when we’re talking about the health effects, we have to really understand that they’re a manifestation of the climate crisis. It’s not something we’re going to see in the future. It’s something that’s happening right now.
Read more about wildfire smoke:
The World's Wildfire Models Are Getting Torched
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Six months in, federal agencies are still refusing to grant crucial permits to wind developers.
Federal agencies are still refusing to process permit applications for onshore wind energy facilities nearly six months into the Trump administration, putting untold billions in energy infrastructure investments at risk.
On Trump’s first day in office, he issued two executive orders threatening the wind energy industry – one halting solar and wind approvals for 60 days and another commanding agencies to “not issue new or renewed approvals, rights of way, permits, leases or loans” for all wind projects until the completion of a new governmental review of the entire industry. As we were first to report, the solar pause was lifted in March and multiple solar projects have since been approved by the Bureau of Land Management. In addition, I learned in March that at least some transmission for wind farms sited on private lands may have a shot at getting federal permits, so it was unclear if some arms of the government might let wind projects proceed.
However, I have learned that the wind industry’s worst fears are indeed coming to pass. The Fish and Wildlife Service, which is responsible for approving any activity impacting endangered birds, and the U.S. Army Corps of Engineers, tasked with greenlighting construction in federal wetlands, have simply stopped processing wind project permit applications after Trump’s orders – and the freeze appears immovable, unless something changes.
According to filings submitted to federal court Monday under penalty of perjury by Alliance for Clean Energy New York, at least three wind projects in the Empire State – Terra-Gen’s Prattsburgh Wind, Invenergy’s Canisteo Wind, and Apex’s Heritage Wind – have been unable to get the Army Corps or Fish and Wildlife Service to continue processing their permitting applications. In the filings, ACE NY states that land-based wind projects “cannot simply be put on a shelf for a few years until such time as the federal government may choose to resume permit review and issuance,” because “land leases expire, local permits and agreements expire, and as a result, the project must be terminated.”
While ACE NY’s filings discuss only these projects in New York, they describe the impacts as indicative of the national industry’s experience, and ACE NY’s executive director Marguerite Wells told me it is her understanding “that this is happening nationwide.”
“I can confirm that developers have conveyed to me that [the] Army Corps has stopped processing their applications specifically citing the wind ban,” Wells wrote in an email. “As I have understood it, the initial freeze covered both wind and solar projects, but the freeze was lifted for solar projects and not for wind projects.”
Lots of attention has been paid to Trump’s attacks on offshore wind, because those projects are sited entirely in federal waters. But while wind projects sited on private lands can hypothetically escape a federal review and keep sailing on through to operation, wind turbines are just so large in size that it’s hard to imagine that bird protection laws can’t apply to most of them. And that doesn’t account for wetlands, which seem to be now bedeviling multiple wind developers.
This means there’s an enormous economic risk in a six-month permitting pause, beyond impacts to future energy generation. The ACE NY filings state the impacts to New York alone represent more than $2 billion in capital investments, just in the land-based wind project pipeline, and there’s significant reason to believe other states are also experiencing similar risks. In a legal filing submitted by Democratic states challenging the executive order targeting wind, attorneys general listed at least three wind projects in Arizona – RWE’s Forged Ethic, AES’s West Camp, and Repsol’s Lava Run – as examples that may require approval from the federal government under the Bald and Golden Eagle Protection Act. As I’ve previously written, this is the same law that bird conservation advocates in Wyoming want Trump to use to reject wind proposals in their state, too.
The Fish and Wildlife Service and Army Corps of Engineers declined to comment after this story's publication due to litigation on the matter. I also reached out to the developers involved in these projects to inquire about their commitments to these projects in light of the permitting pause. We’ll let you know if we hear back from them.
On power plant emissions, Fervo, and a UK nuclear plant
Current conditions: A week into Atlantic hurricane season, development in the basin looks “unfavorable through June” • Canadian wildfires have already burned more land than the annual average, at over 3.1 million hectares so far• Rescue efforts resumed Wednesday in the search for a school bus swept away by flash floods in the Eastern Cape province of South Africa.
EPA
The Environmental Protection Agency plans to announce on Wednesday the rollback of two major Biden-era power plant regulations, administration insiders told Bloomberg and Politico. The EPA will reportedly argue that the prior administration’s rules curbing carbon dioxide emissions at coal and gas plants were misplaced because the emissions “do not contribute significantly to dangerous pollution,” per The Guardian, despite research showing that the U.S. power sector has contributed 5% of all planet-warming pollution since 1990. The government will also reportedly argue that the carbon capture technology proposed by the prior administration to curb CO2 emissions at power plants is unproven and costly.
Similarly, the administration plans to soften limits on mercury emissions, which are released by burning coal, arguing that the Biden administration “improperly targeted coal-fire power plants” when it strengthened existing regulations in 2024. Per a document reviewed by The New York Times, the EPA’s proposal will “loosen emissions limits for toxic substances such as lead, nickel, and arsenic by 67%,” and for mercury at some coal power plants by as much as 70%. “Reversing these protections will take lives, drive up costs, and worsen the climate crisis,” Climate Action Campaign Director Margie Alt said in a statement. “Instead of protecting American families, [President] Trump and [EPA Administrator Lee] Zeldin are turning their backs on science and the public to side with big polluters.”
Fervo Energy announced Wednesday morning that it has secured $206 million in financing for its 400-megawatt Cape Station geothermal project in southwest Utah. The bulk of the new funding, $100 million, comes from the Breakthrough Energy Catalyst program.
Fervo’s announcement follows on the heels of the company’s Tuesday announcement that it had drilled its hottest and deepest well yet — at 15,000 feet and 500 degrees Fahrenheit — in just 16 days. As my colleague Katie Brigham reports, Fervo’s progress represents “an all too rare phenomenon: A first-of-a-kind clean energy project that has remained on track to hit its deadlines while securing the trust of institutional investors, who are often wary of betting on novel infrastructure projects.” Read her full report on the clean energy startup’s news here.
The United Kingdom said Tuesday that it will move forward with plans to construct a $19 billion nuclear power station in southwest England. Sizewell C, planned for coastal Suffolk, is expected to create 10,000 jobs and power 6 million homes, The New York Times reports. Sizewell would be only the second nuclear power plant to be built in the UK in over two decades; the country generates approximately 14% of its total electricity supply through nuclear energy. Critics, however, have pointed unfavorably to the other nuclear plant under construction in the UK, Hinkley Point C, which has experienced multiple delays and escalating costs throughout its development. “For those who have followed Sizewell’s progress over the years, there was a glaring omission in the announcement,” one columnist wrote for The Guardian. “What will consumers pay for Sizewell’s electricity? Will it still be substantially cheaper in real terms than the juice that will be generated at Hinkley Point C in Somerset?” The UK additionally announced this week that it has chosen Rolls-Royce as the “preferred bidder” to build the country’s first three small modular nuclear reactors.
The European Union on Tuesday proposed a ban on transactions with Nord Stream 1 and 2 as part of a new package of sanctions aimed at Russia, Bloomberg reports. “We want peace for Ukraine,” the president of the European Commission, Ursula von der Leyen, said at a news conference in Brussels. “Therefore, we are ramping up pressure on Russia, because strength is the only language that Russia will understand.” The package would also lower the price cap on Russian oil to $45 a barrel, down from $60 a barrel, von der Leyen said, as well as crack down on Moscow’s “shadow fleet” of vessels used to transport sanctioned products like crude oil. The EU’s 27 member states need to unanimously agree to the package for it to be adopted; their next meeting is on June 23.
The world’s oceans hit their second-highest temperature ever in May, according to the European Union’s Earth observation program Copernicus. The average sea surface temperature for the month was 20.79 degrees Celsius, just 0.14 degrees below May 2024’s record. Last year’s marine heat had been partly driven by El Niño in the Pacific, so the fact that the oceans remain warm in 2025 is alarming, Copernicus senior scientist Julien Nicolas told the Financial Times. “As sea surface temperatures rise, the ocean’s capacity to absorb carbon diminishes, potentially accelerating the build-up of greenhouse gases in the atmosphere and intensifying future climate warming,” he said. In some areas around the UK and Ireland, the sea surface temperature is as high as 4 degrees Celsius above average.
Image: Todd Cravens/Unsplash
The Pacific Island nation of Tonga is poised to become the first country to recognize whales as legal persons — including by appointing them (human) representatives in court. “The time has come to recognize whales not merely as resources but as sentient beings with inherent rights,” Tongan Princess Angelika Lātūfuipeka Tukuʻaho said in comments delivered ahead of the U.N. Ocean Conference in Nice, France.
Microsoft, Amazon, Google, and the rest only have so much political capital to spend.
When Donald Trump first became a serious Presidential candidate in 2015, many big tech leaders sounded the alarm. When the U.S. threatened to exit the Paris Agreement for the first time, companies including Google, Microsoft, Apple, and Facebook (now Meta) took out full page ads in The New York Times and The Wall Street Journal urging Trump to stay in. He didn’t — and Elon Musk, in particular, was incensed.
But by the time specific climate legislation — namely the Inflation Reduction Act — was up for debate in 2022, these companies had largely clammed up. When Trump exited Paris once more, the response was markedly muted.
Now that the IRA’s tax credits face clear and present threats, this same story is playing out again. As the Senate makes its changes to the House’s proposed budget bill, tech giants such as Microsoft, Google, Meta, and Amazon are keeping quiet, at least publicly, about their lobbying efforts. Most did not respond to my request for an interview or a statement clarifying their position, except to say they had “nothing to share on this topic,” as Microsoft did.
That’s not to say they have no opinion about the fate of clean energy tax credits. Microsoft, Google, Meta, and Amazon have all voluntarily set ambitious net-zero emissions targets that they’re struggling to meet, largely due to booming data center electricity demand. They’re some of the biggest buyers of solar and wind energy, and are investing heavily in nuclear and geothermal. (On Wednesday morning, Pennsylvania’s Talen Energy announced an expanded power purchase agreement with Amazon, for nearly 2 gigawatts of power through 2042.) All of these energy sources are a whole lot more accessible with tax credits than without.
There’s little doubt the tech companies would prefer an abundant supply of cheap, clean energy. Exactly how much they’re willing to fight for it is the real question.
The answer may come down to priorities. “It’s hard to overstate how much this race for AI has just completely changed the business models and the way that these big tech companies are thinking about investment,” Jeff Navin, co-founder of the climate-focused government affairs firm Boundary Stone Partners, told me. “While they’re obviously going to be impacted by the price of energy, I think they’re even more interested and concerned about how quickly they can get energy built so that they can build these data centers.”
The tech industry has shown much more reluctance to stand up to Trump, period, this time around. As the president has moved from a political outsider to the central figure in the Republican party, hyperscalers have increasingly curried his favor as they advocate against actions that could pose an existential risk to their business — think tighter regulations on the tech sector or AI, or tariffs on key supplies made in Asia.
As Navin put it to me, “When you have a president who has very strong opinions on wind turbines and randomly throws companies’ names in tweets in the middle of the night, do you really want to stick your neck out and take on something that the president views as unpopular if you’ve got other business in front of him that could be more impactful for your bottom line?”
It is undeniably true that the AI-driven data center boom is pushing these companies to look for new sources of clean power. Last week Meta signed a major nuclear deal with Constellation Energy. Microsoft is also partnering with Constellation to reopen Three Mile Island, while Google and Amazon have both announced investments in companies developing small modular reactors. Meta, Google, and Microsoft are also investing in next-generation geothermal energy startups.
But while the companies are eager to tout these partnerships, Navin suspects most of their energy lobbying is now being directed towards efforts such as permitting reform and building out transmission infrastructure. Publicly available lobbying records confirm that these are indeed focus areas, as they’re critical to bringing data centers online quickly, regardless of how they’re powered and whether that power is subsidized. “They’re not going to stop construction on an energy project that has access to electricity just because that electricity is marginally more expensive,” Navin told me. “There’s just too much at stake.”
Tech companies have lobbied on numerous budget, tax, sustainability, and clean energy issues thus far this year. Amazon’s lobbying report is the only one to specifically call out efforts on “renewable energy tax credits,” while Meta cites “renewable energy policy” and Microsoft name-drops the IRA. But there’s no hard and fast standard for how companies describe the issues they’re lobbying on or what they’re looking to achieve. And perhaps most importantly, the reports don’t disclose how much money they allot to each issue, which would illuminate their priorities.
Lobbying can also happen indirectly, via industry groups such as the Clean Energy Buyers Association and the Data Center Coalition. Both have been vocal advocates for preserving the tax credits. The Wall Street Journal recently detailed a lobbying push by the latter — which counts Microsoft, Amazon, Meta, and Google among its most prominent members — that involved meetings with about 30 Republican senators and a letter to Senate Majority Leader John Thune.
DCC didn’t respond to my request for an interview. But CEBA CEO Rich Powell told me, “If we take away these incentives right now, just as we’re getting the rust off the gears and getting back into growth mode for the electricity economy, we’re really concerned about price spikes.”
The leader of another industry group, Advanced Energy United, shared Powell’s concern that passing the bill would mean higher electricity prices. Taking away clean energy incentives would ”fundamentally undercut the financing structure for — let’s be frank — the vast majority of projects in the interconnection queue today,” Harry Godfrey, the managing director of AEU, told me.
Being part of an industry association is by no means a guarantee of political alignment on every issue. Microsoft, Google, Meta, and Amazon are also members of the U.S. Chamber of Commerce — by far the largest lobbying group in the U.S. — which has a long history of opposing climate action and the IRA itself. Apple even left the Chamber in 2009 due to its climate policy stances.
But Powell and Godfrey implied that the tech giants' views are — or at least ought to be — in alignment with theirs. “Many of our members are lobbying independently. Many of them are lobbying alongside us. And then many of them are supporting CEBA to go and lobby on this,” Powell told me, though he wouldn’t reveal what actions any specific hyperscalers were taking.
Godfrey said that AEU’s positions are “certainly reflective of what large energy consumers, notably tech companies, have been working to pursue across a variety of technologies and with applicability to a couple of different types of credits.”
And yet hyperscalers may have already spent a good deal of their political capital fighting for a niche provision in the House’s version of the budget bill, which bans state-level AI regulation for a decade. That would make the AI boom infinitely easier for tech companies, who don’t want to deal with a patchwork of varying regulations, or really most regulations at all.
On top of everything else, big tech in particular is dealing with government-led anti-trust lawsuits, both at home and abroad. Google recently lost two major cases to the Department of Justice, related to its search and advertising business. A final decision is pending regarding the Federal Trade Commission’s antitrust lawsuit against Meta, regarding the company’s acquisition of Instagram and WhatsApp. Not to be outdone, Amazon will also be fighting an antitrust case brought by the FTC next year.
As these companies work to convince the public, politicians, and the courts that they’re not monopolistic rule-breakers, and that AI is a benevolent technology that the U.S. must develop before China, they certainly seem to be relinquishing the clean energy mantle they once sought to carry, at least rhetorically. We’ll know more once all these data centers come online. But if the present is any indication, speed, not green electrons, is the North Star.
Editor’s note: This story has been updated to reflect Amazon’s power purchase agreement with Talen Energy.