You’re out of free articles.
Log in
To continue reading, log in to your account.
Create a Free Account
To unlock more free articles, please create a free account.
Sign In or Create an Account.
By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy
Welcome to Heatmap
Thank you for registering with Heatmap. Climate change is one of the greatest challenges of our lives, a force reshaping our economy, our politics, and our culture. We hope to be your trusted, friendly, and insightful guide to that transformation. Please enjoy your free articles. You can check your profile here .
subscribe to get Unlimited access
Offer for a Heatmap News Unlimited Access subscription; please note that your subscription will renew automatically unless you cancel prior to renewal. Cancellation takes effect at the end of your current billing period. We will let you know in advance of any price changes. Taxes may apply. Offer terms are subject to change.
Subscribe to get unlimited Access
Hey, you are out of free articles but you are only a few clicks away from full access. Subscribe below and take advantage of our introductory offer.
subscribe to get Unlimited access
Offer for a Heatmap News Unlimited Access subscription; please note that your subscription will renew automatically unless you cancel prior to renewal. Cancellation takes effect at the end of your current billing period. We will let you know in advance of any price changes. Taxes may apply. Offer terms are subject to change.
Create Your Account
Please Enter Your Password
Forgot your password?
Please enter the email address you use for your account so we can send you a link to reset your password:
Ultraprocessed clothing is bad for the environment and bad for you.

News broke in early November that the U.S. federal dietary guidelines might soon warn Americans against eating “ultraprocessed food.”
It’s far from a done deal — an advisory committee is merely examining the issue, with no action expected before 2025. But it’s still somewhat of a duh moment for the millions of people who, over the past two decades, have turned away from food that comes in instant packets, boxes, and cans, and toward things that come from the produce aisle or the farmers market. Recent research makes a strong case that — more than individual villains like sugar, corn syrup, trans fats, and salt — it’s the way all these ingredients and more are pounded, mixed, extruded, and stuffed into shelf-stable forms that lead to health problems and weight gain.
Michael Pollan — the author who brought you the mantra “Eat real food, not too much, mostly plants” — is arguably one of the biggest catalysts for the real food movement. In a lesson from his Masterclass on intentional eating, he warns against foods with “very long ingredient lists,” saying that “the simplest way to think about an ultraprocessed food is you can’t imagine making it at home.”
You’ve heard of fast food and its linguistic child: the environmental scourge that is fast fashion. I would like to add a new term to the health and environmental zeitgeist:
Ultraprocessed fashion.
In the early 2010s, I saw my own health and happiness vastly improve after overhauling my diet to eat whole, farm-fresh foods. But I wanted to take it further. I figured that if it matters to the environment and our health where we buy our food from, it might matter where we get other things, like beauty products, home goods, and fashion.
Still, for a long, the argument for U.S. shoppers in favor of buying more sustainable fashion — the kind of classic, durable pieces skillfully made of natural fibers by artisans and American factories — was largely an altruistic one. Sustainable fashion purchases were meant to benefit a cotton farmer in India you would never meet, to protect a river in Kenya you would never see, or support a community of craftspeople in Thailand you would never have the privilege of knowing.
Even more nebulous, arguments that purchasing this instead of that would prevent the release of (super rough estimate) a few pounds of invisible climate-polluting gas into the atmosphere have not proven to be a very strong motivator for shoppers. In survey after survey, consumers swear up and down that they care deeply about sustainability … as long as it doesn’t inconvenience them, cost more money, or look too crunchy.
That’s an impossible standard. Sustainable fashion, whether it takes the form of a 100% wool sweater from California, a hand-block-printed cotton sundress, or a naturally dyed button-down, is always going to be more expensive than its synthetic counterpart made in a sweatshop somewhere where the workers are cheap and the laws are loose. Neither does slow fashion keep up with TikTok trends, by definition.
I initially had a hard time connecting sustainable fashion to Western shoppers’ well-being beyond the argument that an overstuffed, chaotic closet full of fast fashion can’t be good for your mental health or time management. After all, we’re not eating our clothing, right?
That all changed in 2019, when I first heard that Delta Air Lines attendants were suing Lands’ End, the maker of their uniforms, saying the new clothes were making them sick.
If you could call any clothing ultraprocessed, it would be these uniforms. While old airline outfits were made of traditional wool suiting and cotton button-downs in staid colors, the uniforms introduced in the past decade or so at Alaska Airlines, American Airlines, Delta, and Southwest all were made of synthetic blends. They came in super-saturated colors and were coated in layers of performance chemicals: flame retardants, Teflon for stain resistance, and formaldehyde-based wrinkle-free finishes. They were made fast and cheap by suppliers in countries with lax environmental standards.
As I reported in my book To Dye For: How Toxic Fashion Is Making Us Sick – and How We Can Fight Back, at every single one of those four major airlines, up to a quarter of the attendants reported having health reactions, including rashes and skin burns, breathing problems, hair loss, blurry vision, brain fog, and extreme fatigue. Some attendants had to be taken off their planes and brought to the ER. Though the lawsuit by Delta flight attendants didn’t move forward, in November of this year a jury awarded over $1 million to four American Airlines flight attendants who said their Twin Hill uniforms made them sick.
The next question that arises is: Is this happening to regular folks, too? And the answer is yes, but in more subtle and insidious ways. For example, the kinds of dyes used on synthetic materials like polyester (disperse dyes) are well-known to dermatologists to be common skin sensitizers. But many people may not know it’s clothing exacerbating their toddler’s eczema or setting off their own skin problems.
But the issue is more serious than just rashes, though rashes are often the first sign that something is wrong. Researchers and advocacy groups have tested fashion from well-known brands and counterfeits alike and found heavy metals like lead, chromium, and cadmium; endocrine disruptors like Bisphenol A (BPA), phthalates, and per-and poly-fluoroalkyl substances (PFAS); biocides, pesticides, and fungicides; and known carcinogens like benzene, certain azo dyes, and formaldehyde. (This is an abbreviated list, by the way.)
We’ve known for a long time these chemicals end up in our water and environment. PFAS, a toxic class of chemicals used for imbuing synthetics with water resistance, has been found all over Mount Everest’s summit, for example. But what we’re increasingly seeing is that our fashion, like our diets, affects our physical health.
Take microfibers, which in Heatmap’s recent survey were deemed to be a problem by 61% of respondents, and an “extremely serious” problem by 25% of respondents. When microfibers come off our clothes in the wash or break off our clothes and become part of our house dust, they bring with them everything that is in and on clothing. Given that we’re ingesting microfibers every day, we are eating our clothes. We’re also breathing in their VOCs, and our sweat is pulling those chemicals out of fibers onto our skin, where they can be absorbed into our bloodstream.
One of the main reasons fashion has turned from a field-to-closet endeavor to a chemistry experiment is the same as for food: It’s more profitable to sell highly processed, branded products made exclusively from petrochemicals and with a lot of marketing promises than it is to sell traditional pieces made from natural materials.
This happens at both ends of the fashion spectrum. At the low end, as Shein has shown, you can grow your company at an unprecedented speed by sourcing huge volumes of $5 polyester minidresses from garment factories with dubious working conditions, according to numerous reports.
At the other end, a company can add proprietary, brand-name chemistry like Gore-Tex to outdoor gear and sell it at a huge markup. Just observe a bit currently going around on TikTok where a spouse or partner requests you wear your most expensive clothing to an event or to meet the parents, so you show up in hiking gear.
Sure, if you’re a professional fisherman plowing through rough seas for your catch, a first responder, or a scientist living in the Arctic, you may well need high-performance gear. But for the rest of us, it’s just aspirational marketing, kind of like drinking Gatorade while you’re on the couch watching football.
Like the food industry before it, the fashion industry’s focus when it comes to safe and non-toxic fashion has been on individual chemicals or classes of chemicals instead of the holistic picture. The (completely voluntary) standards used by some fashion brands and certifications will test a textile for a tiny percentage of the tens of thousands of possible chemical substances in circulation, and if each is under the (often arbitrary) limit, the fashion piece will be declared safe.
This approach, however, doesn’t take into account how chemicals can mix to have synergistic effects on the same organs or cause the same health effects.
For example, it’s completely within the realm of possibility for one clothing item or outfit to have BPA, phthalates, and PFAS, each of which by itself wreaks havoc on our hormonal system, even in tiny, tiny amounts. Some of these chemicals are used to process fibers. Some chemicals such as finishes, dyes, and glues are used deliberately and are meant to stay in and on the fashion. Some chemicals are accidental contaminants, as fabrics and components flow through an opaque, unregulated, and just plain sloppy supply chain.
That then can affect everything from our reproductive system and energy levels to our skin appearance and weight. And all this while you’re trying to take care of your health by taking a hike or hitting the gym. It kind of reminds me of when cereal brands will brag about the vitamins they’ve added to their sugary, processed cereal.
What’s more, unlike food, cleaning products, and beauty products, clothing doesn’t come with a complete ingredient list. Anything under 5% of the weight of the product doesn’t have to be included. So what kind of finishes, dyes, threads, or contaminants are present in any piece of fashion is somewhat of a mystery.
When people ask me what they should buy or what they should clean out of their closets, I usually give them a list of things to look for and things to avoid — yes to natural fibers like cotton, wool, linen, bamboo rayon, and silk; no to toxic “vegan” leather polyvinyl chloride (PVC) and other synthetics, which are more likely to contain hazardous or sensitizing chemicals; avoid neon bright colors and buy naturally dyed or undyed products when you can; don’t dry clean your clothes.
But a simpler way to think about it would be to avoid clothing and accessories that your grandparents would look askance at, just like Pollan has encouraged us to do at the grocery store. Wait, what is Pertex® 20D Diamond Fuse Ripstop nylon? Or a polyester Lycra® elastane blend with anti-odor technology? What does it mean when something has Durable Water Repellant? What is actually in Memory Foam™ or the smelly glue that bonds it to the bottom of a sneaker? Do you really believe that a piece of clothing that smells like gasoline out of the box is okay for your health — or for anyone’s health? Which sounds better to you: chromium-tanned leather or vegetable-tanned leather?
Sure, it may take a bit more time, skill, and investment than buying synthetic clothing that you drop off at the dry cleaner. But then again, so does making a nutritious meal from ingredients you get at the farmer’s market. And, I would argue, both are a core part of cultivating a healthier, more vibrant, community-oriented, and nurturing life.
Log in
To continue reading, log in to your account.
Create a Free Account
To unlock more free articles, please create a free account.
Facing down a sea change, the automaker has staked its next EV bet on a compact, sporty pickup.
“Full fathom five, your father lies,” the invisible spirit Ariel sings early in The Tempest, as a handsome and grieving prince listens, rapt. The song tells of a shipwrecked skeleton transforming into something else — its eyes have become pearls, and its bones pink coral — as it undergoes, yes, a “sea change.” It is the first time that phrase appears in the English language.
Ford is now facing its own kind of sea change. Over the past decade, the automaker has doubled down on its most profitable and exciting vehicles — pickups, SUVs, and the Mustang muscle car — and dropped from its line-up the cheap, boring cars that once made it famous. It embraced, then backed off, the transition to electric vehicles, in part because it failed to make money from them; and it began to reckon with the surge of cheaper, cleaner, and “far superior” EVs from Chinese producers that are transforming global auto markets around the world.
Locked into its aging but reliable line-up, yet unable to innovate at the low end, Ford might seem like the epitome of a company facing disruptive innovation. No wonder its stock has traded flat from where it was five years ago — even as the broader market has surged by more than 70%.
Its solution is an EV skunkworks, run by Tesla alumni, where it can develop a new “universal EV platform” to undergird future vehicles. Today, we got a peek at the first car to emerge from that secret shop: an all-electric compact pickup that will hit the roads by the end of next year. Its name? The Ford Fathom.
We know very little about the Fathom, as our correspondent Andrew Moseman wrote today. It will retail for just over $28,000, and even with mandatory delivery costs and other add-ons will stick to this side of $30,000. That makes it only a smidge more expensive than the gas-burning Ford Maverick, a sporty, compact, and popular pickup that starts around $27,000.
Ford promises that the Fathom will have as much seating capacity as Toyota’s RAV4, America’s best-selling car that isn’t a truck. (Ford’s own F-150, of course, holds the true No. 1 spot.) Those dimensions suggest the Fathom will sport a four-door crew cab, like the Maverick, making it more acceptable to families with kids — or young professionals who want to give their friends rides on the weekend. It will also have a frunk.
Beyond that, though, we don’t know much. We don’t know its range, for instance, and its price point shouldn’t inspire too much confidence on that front. Nor do we know, frankly, whether Ford can pull it off: When the automaker announced its first electric truck, the F-150 Lightning, in 2021, it claimed a price point of less than $40,000. Eighteen months of inflation later, it actually sold them for closer to $55,000 — and it still lost money on every EV that it made. Fixing the latter problem is part of why the skunkworks exists in the first place, and Ford now has an additional half-decade of experience making EVs. But consumers hoping for a miraculously priced electric pickup from the Blue Oval have been burned before.
If the Fathom disappoints, though, then consumers will soon have other options. The American car market is about to be deluged with sporty, compact pickup trucks — a welcome change from just a few years ago, when the segment was almost entirely dominated by mid-size and half-ton models. The Jeff Bezos-backed startup Slate will start delivering two-door, all-electric pickups starting at $25,000 at the end of this year. The automaker Stellantis, which owns the Dodge and Jeep brands, says it wants to bring another compact pickup — it’s almost more of a ute — called the Rampage to North America soon.
That’s welcome news for me — I love these little trucks — but I’m a little worried I’ll be outside my pickup-buying years by the time they actually make it to market. In the meantime, I’ll keep you posted on other updates about the Fathom. Will “sea nymphs hourly ring its knell”? No, but it will have Apple CarPlay and Android Auto.
The company confirmed its plans to market research company Cleanview.
The data center buildout has hit a new inflection point. It has long been true that artificial intelligence is fueling climate change by driving up power demand; more recently, tech companies have started directly financing new natural gas plants in their quest for AI glory. Now one is backing the biggest fossil fuel-fired power plant ever to exist in the United States — exclusively to power an AI data center complex.
That company is Amazon, according to the market research company Cleanview, which reported on Friday that the tech giant is building an AI data center campus in Texas powered by an up to 7.65-gigawatt off-grid natural gas plant.
That’s larger than any other power plant in the country — fossil or otherwise. The next biggest plant is the Grand Coulee hydroelectric plant in Washington State, at 7 gigawatts, followed by Arizona’s 4-gigawatt Palo Verde nuclear plant, and the West Count Energy Center, a 3.7-gigawatt natural gas plant in Florida.
The new power plant’s developer, Pacifico Energy, announced in January that it had secured permits from Texas regulators for the project, dubbed “GW Ranch.” The site is also permitted for up to 750 megawatts of solar and 1.8 gigawatts of battery energy storage.
It was not clear who the customer for all this energy would be until earlier this week, when Cleanview uncovered construction permits Amazon filed showing that the company owned the GW Ranch site. The company confirmed to Cleanview that it acquired the site and planned to buy power from Pacifico’s plant.
Not only will this natural gas plant be larger than the one in Florida, it will also use far less efficient technology. Pacifico’s permit says it plans to build 35 “simple cycle” generating units, which are typically installed in rarely-used peaker power plants and waste a lot more fuel potential than the modern “combined cycle” natural gas plants that serve as baseload power for the grid today. These more efficient turbines are essentially on backorder for years, and power-hungry developers have increasingly turned to the simpler versions as a quick fix as they race to bring facilities online.
According to its permit, the GW Ranch plant is allowed to emit as much as 33 million tons of CO2 per year. That’s twice as much as the most-polluting power plant in the country, the James H. Miller Jr. coal plant in Alabama, emitted in 2023, the most recent year for which data is available.
In a statement to Cleanview, an Amazon spokesperson said the company “believes in paying the full costs of powering our operations,” and that this Texas project “does just that: it’s powered by new on-site generation that won’t raise electricity costs for Texas families and designed to transition to grid-connected service as interconnection timelines allow.”
Some researchers disagree on that point, however. In an opinion piece for Utility Dive, Energy Innovation director Jeffrey Rissman and senior fellow Eric Gimon argue that the proliferation of off-grid natural gas generation for data centers will increase costs for regular people more than if the data centers connected to the grid, because they will be competing with utility companies for gas supply. “Data centers can buy gas in bulk and sign long-term contracts (as we’ve seen in Texas, Pennsylvania and New Mexico), giving them access to cheap gas, even if this unfairly drives up prices for everyone else,” they write.
Jane Flegal, a senior fellow at the Searchlight Institute, has also argued that building off-grid natural gas plants to serve data centers locks in emissions for decades because the plants don’t face competitive pressure from other resources. When a new natural gas plant is hooked up to the grid, by contrast, there’s a far greater chance that cheaper, cleaner resources will displace its generation over time.
The Rhodium Group recently developed a scoring system to help investors differentiate between projects that are likely to accelerate the energy transition, those that will have little effect one way or the other, and those that will actively slow it down. They used it to assess options for powering data centers, and found that off grid natural gas plants scored the worst, falling at the bottom of the latter category.
Regardless, Amazon still, somehow, asserts that it is committed to achieve net zero emissions by 2040.
The smoke pouring into Seattle from Spokane is particularly bad, but there’s also no such thing as good smoke.
I wrote this story from inside a cloud of smoke. Owing to some funky meteorology in the Seattle area this week — a pressure ridge paired with a thermal trough — the region’s usual westerly winds reversed, causing smoke from the fires burning in the eastern half of the state to pour through the mountain passes and river valleys of the Cascades and pool over the populous Puget Sound lowlands, where I live.
Though it’s cleared up some today, I’m still running my air purifier on full blast because I know what’s in the lingering smoke. Unlike the still blazing wildfires in Ontario that are burning through mostly uninhabited forests, the smoke in the Seattle area this week came to us partially from Spokane, where the Old Trails fire razed at least 700 buildings and homes last weekend. That means that beyond the usual organic matter associated with wildfire smoke, the pollution that has hung over Seattle has likely also contained particles and chemicals from burned plastics, batteries, cars, and household appliances.
But how can the average person be sure whether their wildfire smoke is the bad kind or the worse kind? (At least assuming that well-adjusted people do not obsessively watch the animations on AirNow.Gov, as I do.) I turned to Coty Jen, an associate professor of chemical engineering, and Albert Presto, a research professor of mechanical engineering, both of Carnegie Mellon University, to learn more about the chemistry of wildfire smoke.
“There is no safe smoke,” Jen said, setting me straight immediately. “It’s all bad. It will piss your body off.”
While it’s true that some smoke is more toxic than other smoke, what you might call the “all natural, organic” variety will still spike hospital emission rates and exacerbate pre-existing respiratory diseases, even if it is mostly burning trees.
Under ideal conditions, when cellulose or lignin — the main structural components of trees and plants as well as leaf litter and soil, the largest sources of carbon during a forest fire — heat up and combust, the chemical reaction creates carbon dioxide, water, heat, and light. But wildfires don’t burn cleanly, and the chemical reactions often stall midway through that process due to things like oxygen availability and temperature variation, producing intermediate products like carbon monoxide or partially broken-down bits of carbon, often called soot. The tiniest of these particles can be smaller than 2.5 micrometers across — 30 or more could fit across the width of a human hair — and are measured collectively as PM2.5, a catch-all term that refers to the size of the particle rather than what it is. What’s important, though, is that these particles are small enough to penetrate deep into our lungs and potentially enter our bloodstream, factors that add to the known mortality associated with PM2.5 exposure.
Different kinds of forests create different emissions — heavy duff, or leaf litter, which is common in pine forests, creates some of the densest smoke conditions. Wetter fuels also burn “dirtier,” creating more pollution. Different topographies also impact air quality in myriad ways; it’s no surprise that some of the worst pollution from the Spokane wildfires pooled in mountain valleys as a warm overhead layer of air trapped the particles near the ground.
Even “natural” wildfires can be extra toxic; burning eucalyptus, which grows in Southern California, is not something you want to inhale. Pine smoke can cause mutations in bacterial DNA, a common lab test for a substance’s potential to cause cancer. Wildfires that smolder are worse than those that burn fast; researchers have found that PM2.5 can be up to 70 times higher when fuels aren’t actively on fire. “You can even see this if you’ve ever built a fire yourself,” Presto explained. “There’s a period where everything is big and flaming, and then, if you’re burning a log, it eventually goes down to smoldering. The emissions are different.”
In the case of something like a house burning down in a wildfire, however, it’s not only cellulose and lignin combusting. “We’re good at engineering materials that are extremely robust, but when they burn, they release very exotic compounds,” Jen said. She pointed to the common plastic PVC, which is used for everything from exterior siding to plumbing and window frames. When it combusts, PVC releases chlorine, “which is very bad for you,” Jen told me. “It’s like how bleach is bad for you — it’s a pretty nasty chlorine compound. PVC isn’t releasing bleach, but it is releasing radical chlorine molecules that produce some crazy compounds.”
If you’re following a smoke event at home, the answer is “not really.” PM2.5 is measured in micrograms per cubic meter, which tells us how much small stuff is floating around, but not what that small stuff is. “It is pretty difficult to measure all the different compounds that wildfires, or broadly any pollution, will emit,” Jen said. “The easiest way to quantify it is to literally suck air onto a filter and measure how heavy it got.”
Measuring what exactly is in that mass requires instruments that cost in the ballpark of half a million dollars, which is not financially feasible at every air monitoring station, Jen went on. But while there are certainly academic applications for that kind of knowledge, a person trying to decide whether or not to go for their run in wildfire smoke doesn’t need that level of granularity.
“Some smoke is definitely more dangerous,” Jen said. “But as innocent bystanders, it’s not like we can pick and choose what smoke floats over to us. You just have to live with it, so the best mentality is to treat all smoke as bad.”
In a 2026 Science Advances study that attributed more than 24,000 deaths per year to wildfire smoke in the U.S., researchers found no safe threshold for PM2.5 exposure. Every 0.1 microgram per cubic meter increase in a county’s average annual PM2.5 from smoke was associated with nearly 5,600 excess deaths nationwide, even though most counties saw only trace amounts of smoke — about 0.4 micrograms per cubic meter a year. While it’s “orange sky” days, when the pollution spikes into triple-digit AQI numbers, that get the most media attention, even low exposure that you can’t smell or even see can be affecting your health.
PM2.5 is just one component of wildfire smoke — the other is gases, including benzene and formaldehyde. Many gases chemically transform as they move from where the fire is to where you inhale them. “The atmosphere is extremely oxidizing — it likes to add oxygen molecules onto compounds,” Jen said.
Some of those compounds react faster than others, “so it depends how downwind you are,” Jen went on. That’s why people closer to a wildfire — maybe a day or less downwind — get the distinctive campfire smell, mainly from the “young” vapors and volatile organic compounds. But for people on the East Coast who were subject to the Ontario smoke several weeks ago, the smoke had to travel several days to reach places like Pittsburgh and New York, and by then the sharper-smelling compounds had transformed into new pollutants like ozone.
The AQI only measures a few specific gases that are considered “criteria pollutants” under the Clean Air Act, which means, as Presto told me, “during these fires, you could emit a whole bunch of different other gases that don’t have an AQI number.”
Instead, you can look at the PM2.5 number to get the gist of how prevalent wildfire gases are. “If your PM 2.5 is high, it’s impossible for the bad gasses to be low,” Jen said. “The way we think about it is, there’s a bunch of junk on the particle, and if the same junk’s not also in the gas, it will evaporate off the particle into the gas. They always exist together.”
You might notice by now that I’ve written little about the actual AQI number, that score that appears on your weather app and runs from zero to 500 (or, confusingly, even higher). That’s because while the AQI is a great communication tool, it doesn’t offer us much in the way of the science of wildfire smoke.
The AQI measures five different pollutants — PM2.5, ozone, carbon monoxide, sulfur dioxide, and nitrogen dioxide — with the EPA setting specific concentration thresholds for each one, as my colleague Emily Pontecorvo has explained. “If local concentrations of any one of them tick up above those protective standards, the AQI will jump from green to a more alarming color,” she wrote. “The higher the level of pollution is, the higher the AQI and the darker the color will be.”
If you want to impress your friends, though, you ought to zero in specifically on the PM2.5 concentration — again, because the prevalence of the tiniest particulates is a good indicator of all the other gunk you can assume is in the air, too. (You can find the specific PM2.5 concentration usually by clicking for more information about the AQI on your weather app or checking IQ Air’s widget.) For example, at the time of this writing, my local PM2.5 concentration is 50 micrograms per cubic meter, more than triple the World Health Organization’s 15 micrograms per cubic meter threshold for 24-hour exposure. (The EPA’s 24-hour threshold is much more lenient, at 35 micrograms per cubic meter.)
When I asked Jen how she stays sane knowing all she knows about smoke exposure, she laughed. “I have just generally become more terrified of all campfires and all barbecues, but people already think I’m weird, so I might as well add to it,” she told me.
In all seriousness, though, she told me the answer is air filters, and her confidence in their ability to work. When wildfire smoke rolled through Pittsburgh, she had two running that she moved from room-to-room with her family, as well as a whole-house air filter. “We were getting PM2.5 concentrations in our house of about 80 micrograms per cubic meter when it was 150 outside,” she said. “But with the air filter on, we could drop that down to less than eight.”
Jen pointed out, though, that many people do not run their air filters properly. Filters are rated at their highest blower level, “so for them to be effective, you need to crank them to their highest setting to get all the air through,” she said. Most people keep their filters on auto or low because they’re so loud — myself included, until I learned otherwise.
Additionally, while an air filter is a rather large appliance, it really ought to be placed in the center of your room to be the most efficient, rather than up against a wall. (Again, my bad.) “When these wildfire events happen, the most effective place for the air filter is where you are, and you have to run it loud, which kind of sucks,” Jen said. “But it is better than breathing in gross air.”