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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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The Environmental Protection Agency just unveiled its argument against regulating greenhouse emissions from power plants.
In federal policymaking, the weight of the law can rest on a single word. When it comes to reducing planet-warming emissions from the power sector, that word is “significantly.” The Clean Air Act requires the Environmental Protection Agency to regulate any stationary source of emissions that “causes, or contributes significantly to, air pollution which may reasonably be anticipated to endanger public health or welfare.”
The EPA has considered power plants a significant source of dangerous greenhouse gases since 2015. But today, Trump’s EPA said, actually, never mind.
A proposed rule published in the Federal Register on Wednesday argues that U.S. fossil fuel-fired power plants make up “a small and decreasing part of global emissions” and therefore are not significant, and do not require regulation under the law. The rule would repeal all greenhouse gas emission standards for new and existing power plants — both the standards the Biden administration finalized last year, which have been tied up in court, as well as the standards that preceded them, which were enacted by Obama in 2015.
In a separate proposal, the EPA also took steps to repeal limits on mercury and hazardous air pollutants from coal plants that were enacted last year, reverting the standard back to one set in 2012.
The argument that U.S. power plants make up a small sliver of global emissions and thus aren’t worth addressing is like having “a five-alarm fire that could be put out if you send out all the trucks, and you don’t send any of the trucks because no one truck could put the fire out by itself,” David Doniger, a senior attorney and strategist at the Natural Resources Defense Council, told me. “We just think that is a wacky reversal and a wacky interpretation of the Clean Air Act.”
When you add up every plug, power button, and light switch across the country, electricity usage produces 25% of U.S. greenhouse gas emissions each year. Over the past 30 years, American power plants have contributed about 5% of the total climate pollution spewed into the atmosphere worldwide.
In the global context, that may sound small. But in a recent report titled “The Scale of Significance," New York University’s Institute for Policy Integrity estimated that if U.S. power plants were a country, it would be the sixth biggest emitter in the world, behind China, the European Union, India, Russia, and the remainder of U.S. emissions. The report also notes that U.S. actions on emissions make other countries more likely to follow, due to technological spillovers that reduce the cost of decarbonization globally.
In addition to the significance finding, the EPA gave two other reasons for repealing the power plant rules. It argued that “cost-effective control measures are not reasonably available,” meaning there’s no economic way to reduce emissions at the source. It also said the new administration’s priority “is to promote the public health or welfare through energy dominance and independence secured by using fossil fuels to generate power.”
The first argument is an attempt to say that Biden’s standards flouted the law. In 2022, the Supreme Court ruled that the EPA could not simply tell states to reduce emissions from the power sector, which is what the Obama administration had initially tried to do. Instead, the agency would have to develop standards that could be applied on a plant-by-plant basis — so long as those rules were “cost-reasonable” and “adequately demonstrated.”
To comply with that ruling, Biden’s EPA based its standards on the potential to install carbon capture technology that can reduce flue gas emissions by 90%. The regulations would have required existing coal plants to install carbon capture by 2039, or else shut down. (To the chagrin of many energy system observers, the administration chose not to apply limits to existing gas-fired power plants.) But while fossil fuel companies and utilities had, in the past, asserted that carbon capture was viable, they deemed the standards impossible to meet.
Trump’s EPA is now agreeing. “In 2024,” Zeldin said on Wednesday, “rules were enacted seeking to suffocate our economy in order to protect the environment, to make all sorts of industries including coal and more disappear, regulate them out of existence.”
When Trump moved to overturn Obama’s power plant regulations during his first term, his EPA did not contest the significance of the sector’s emissions, and simply enacted a weaker standard. A week before he left office, the agency also finalized a rule that set the threshold for “significance” at 3% of U.S. emissions — which exempted major polluters like refineries, but still applied to power plants.
This time, Trump has a new apparent game plan: Strip the Clean Air Act of its jurisdiction over greenhouse gases altogether. Today’s action was the first step; EPA Administrator Lee Zeldin has said the agency will similarly “reconsider” emissions rules for cars and oil and gas drilling. But the cornerstone of the plan is to reverse what’s known as the “endangerment finding” — the 2009 conclusion that greenhouse gases present a threat to public health and welfare, and therefore are one of the pollutants EPA must address under the Clean Air Act.
“The Trump administration is trying to say, don’t worry about the Clean Air Act. It will never apply, so you can go back to your old ways,” said Doniger. But if the argument that power plant emissions are insignificant is a stretch, appraising greenhouse gas emissions as benign is inconceivable, he said. “The endangerment finding was based, in 2009, on a Denali-sized mountain of evidence. Since then, it’s grown to Everest-size, so there’s no way that they would be able to put together a rational record saying the science is wrong.”
These highly technical questions of whether emissions are “significant” or whether carbon capture is “adequately demonstrated” could soon be determined by a group of people who lack both the expertise to answer them and the inclination to wade through thousands of pages of atmospheric science and chemical engineering documents: judges.
Last year, the Supreme Court overturned a long-held precedent known as Chevron deference. That ruling means that the courts are no longer required to defer to an agency’s interpretation of statute — judges must make their own determinations of whether agencies are following the intent of the law.
When environmental groups begin challenging the EPA’s repeals in court, judges are “going to be bombarded with the need to make these highly technical, nuanced decisions,” Michael Wara, a lawyer and scholar focused on climate and energy policy at Stanford University, told me. He said the reason Chevron deference was established in the first place is that judges didn’t want to be making engineering decisions about power plants. “They felt extremely uncomfortable having to make these calls.”
The conservative Supreme Court overturned the precedent because of a sense that political decisions were being dressed up in scientific reasoning. But Wara doesn’t think the courts are going to like being put back into the role of weighing technical minutia and making engineering decisions.
“It’s a past that the courts didn’t like and they tried to engineer a way out of via the Chevron doctrine,” he said. “I would expect that we’re going to see a drift back toward a doctrine that looks a little bit more Chevron-like, maybe less deference to agencies. But it’s hard to predict in the current environment what’s going to happen.”
Look more closely at today’s inflation figures and you’ll see it.
Inflation is slowing, but electricity bills are rising. While the below-expectations inflation figure reported by the Bureau of Labor Statistics Wednesday morning — the consumer price index rose by just 0.1% in May, and 2.4% on the year — has been eagerly claimed by the Trump administration as a victory over inflation, a looming increase in electricity costs could complicate that story.
Consumer electricity prices rose 0.9% in May, and are up 4.5% in the past year. And it’s quite likely price increases will accelerate through the summer, thanks to America’s largest electricity market, PJM Interconnection. Significant hikes are expected or are already happening in many PJM states, including Maryland,New Jersey,Delaware, Pennsylvania, and Ohio with some utilities having said they would raise rates as soon as this month.
This has led to scrambling by state governments, with New Jersey announcing hundreds of millions of dollars of relief to alleviate rate increases as high as 20%. Maryland convinced one utility to spread out the increase over a few months.
While the dysfunctions of PJM are distinct and well known — new capacity additions have not matched fossil fuel retirements, leading to skyrocketing payments for those generators that can promise to be on in time of need — the overall supply and demand dynamics of the electricity industry could lead to a broader price squeeze.
“Trump and JD Vance can get off tweets about how there’s no inflation, but I don’t think they’ll feel that way in a week or two,” Skanda Amarnath, executive director of Employ America, told me.
And while the consumer price index is made up of, well, almost everything people buy, electricity price increases can have a broad effect on prices in general. “Everyone relies on energy,” Amarnath said. “Businesses that have higher costs can’t just eat it.” That means higher electricity prices may be translated into higher costs throughout the economy, a phenomenon known as “cost-push inflation.”
Aside from the particular dynamics of any one electricity market, there’s likely to be pressure on electricity prices across the country from the increased demand for energy from computing and factories. “There’s a big supply adjustment that’s going to have to happen, the data center demand dynamic is coming to roost,” Amarnath said.
Jefferies Chief U.S. Economist Thomas Simons said as much in a note to clients Wednesday. “Increased stress on the electrical grid from AI data centers, electric vehicle charging, and obligations to fund infrastructure and greenification projects have forced utilities to increase prices,” he wrote.
Of course, there’s also great uncertainty about the future path of electricity policy — namely, what happens to the Inflation Reduction Act — and what that means for prices.
The research group Energy Innovation has modeled the House reconciliation bill’s impact on the economy and the energy industry. The report finds that the bill “would dramatically slow deployment of new electricity generating capacity at a time of rapidly growing electricity demand.” That would result in higher electricity and energy prices across the board, with increases in household energy spending of around $150 per year in 2030, and more than $260 per year in 2035, due in part to a 6% increase in electricity prices by 2035.
In the near term, there’s likely not much policymakers can do about electricity prices, and therefore utility bills going up. Renewables are almost certainly the fastest way to get new electrons on the grid, but the completion of even existing projects could be thrown into doubt by the House bill’s strict “foreign entity of concern” rules, which try to extricate the renewables industry from its relationship with China.
“We’re running into a set of cost-push dynamics. It’s a hairy problem that no one is really wrapping their heads around,” Amarnath said. “It’s not really mainstream yet. It’s going to be.”
In some relief to American consumers, if not the planet, while it may be more expensive for them to cool their homes, it will be less expensive to get out of them: Gasoline prices fell 2.5% in May, according to the BLS, and are down 12% on the year.
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 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.