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Whatever Happened to Toilet Plumes?

The Atlantic

www.theatlantic.com › health › archive › 2023 › 01 › covid-virus-spread-toilets-public-bathrooms › 672846

In the dark early days of the pandemic, when we knew almost nothing and feared almost everything, there was a moment when people became very, very worried about toilets. More specifically, they were worried about the possibility that the cloud of particles toilets spew into the air when flushed—known in the scientific literature as “toilet plume”—might be a significant vector of COVID transmission. Because the coronavirus can be found in human excrement, “flushing the toilet may fling coronavirus aerosols all over,” The New York Times warned in June 2020. Every so often in the years since, the occasional PSA from a scientist or public-health expert has renewed the scatological panic.

In retrospect, so much of what we thought we knew in those early days was wrong. Lysoling our groceries turned out to not be helpful. Masking turned out to be very helpful. Hand-washing, though still important, was not all it was cracked up to be, and herd immunity, in the end, was a mirage. As the country shifts into post-pandemic life and takes stock of the past three years, it’s worth asking: What really was the deal with toilet plume?

The short answer is that our fears have not been substantiated, but they weren’t entirely overblown either. Scientists have been studying toilet plume for decades. They’ve found that plumes vary in magnitude depending on the type of toilet and flush mechanism. Flush energy plays a role too: The greater it is, the larger the plume. Closing the lid (if the toilet has one) helps a great deal, though even that cannot completely eliminate toilet plume—particles can still escape through the gap between the seat and the lid.

Whatever the specifics, the main conclusion from years of research preceding the pandemic has been consistent and disgusting: “Flush toilets produce substantial quantities of toilet plume aerosol capable of entraining microorganisms at least as large as bacteria … These bioaerosols may remain viable in the air for extended periods and travel with air currents,” scientists at the CDC and the University of Oklahoma College of Public Health wrote in a 2013 review paper titled “Lifting the Lid on Toilet Plume Aerosol.” In other words, when you flush a toilet, an unsettling amount of the contents go up rather than down.

Knowing this is one thing; seeing it is another. Traditionally, scientists have measured toilet plume with either a particle counter or, in at least one case, “a computational model of an idealized toilet.” But in a new study published last month, researchers at the University of Colorado at Boulder took things a step further, using bright-green lasers to render visible what usually, blessedly, is not. John Crimaldi, an engineering professor and a co-author of the study, who has spent 25 years using lasers to illuminate invisible phenomena, told me that he and his colleagues went into the experiment fully expecting to see something. Even so, they were “completely caught off guard” by the results. The plume was bigger, faster, and more energetic than they’d anticipated—“like an eruption,” Crimaldi said, or, as he and his colleagues put it in their paper, a “strong chaotic jet.”

Within eight seconds, the resulting cloud of aerosols shoots nearly five feet above the toilet bowl—that is, more than six feet above the ground. That is: straight into your face. After the initial burst, the plume continues to rise until it hits the ceiling, and then it wafts outward. It meets a wall and runs along it. Before long, it fills the room. Once that happens, it hangs around for a while. “You can sort of extrapolate in your own mind to walking into a public restroom in an airport that has 20 toilet stalls, all of them flushing every couple minutes,” Crimaldi said. Not a pleasant thought.

The question, then, is not so much whether toilet plume happens—like it or not, it clearly does—as whether it presents a legitimate transmission risk of COVID or anything else. This part is not so clear. The 2013 review paper identified studies of the original SARS virus as “among the most compelling indicators of the potential for toilet plume to cause airborne disease transmission.” (The authors also noted, in a dry aside, that although SARS was “not presently a common disease, it has demonstrated its potential for explosive spread and high mortality.”) The one such study the authors discuss explicitly is a report on the 2003 outbreak in Hong Kong’s Amoy Gardens apartment complex. That study, though, is far from conclusive, Mark Sobsey, an environmental microbiologist at the University of North Carolina at Chapel Hill, told me. The researchers didn’t rule out other modes of transmission, nor did they attempt to culture live virus from the fecal matter—a far more reliable indicator of infectiousness than mere detection.

Beyond that, Sobsey said, there is little evidence that toilet plumes spread SARS or COVID-19. In his own review, published in December 2021, Sobsey found “no documented evidence” of viral transmission via fecal matter. This, at least, seems to track with the three years of pandemic experience we’ve all now endured. Although we can’t easily prove that bathrooms don’t play a significant role in spreading COVID-19, we haven’t seen any glaring indications that they do. And anyway, the coronavirus has found plenty of other awful ways to spread.

Just because toilet plume doesn’t seem to be a vector of COVID transmission, though, doesn’t mean you can forget about it. Gastrointestinal viruses such as norovirus, Sobsey told me, present a more serious risk of transmission via toilet plume, because they are known to spread via fecal matter. The only real solutions are structural. Improved ventilation would keep aerosolized waste from building up in the air, and germicidal lighting, though the technology is still being developed, could potentially disinfect what remains. Neither, however, would stop the plume in the first place. To do that, you would need to change the toilet itself: In order to create a smoother and thus better-contained flush, you could change the geometry of the bowl, the way the water enters and exits, or any number of other variables. Toilet manufacturers could also, you know, stop producing lidless toilets.

But none of that will save you the next time you find yourself staring into a toilet’s blank maw. Crimaldi suggests wearing a mask in public bathrooms to protect against not just the plume created when you flush but also the plumes left by the person who used the bathroom before you, the person who used it before them, and so on. You don’t need to have any great affection for masking as a public-health intervention to consider donning one for a few minutes to avoid literally breathing in shit. Sobsey offered another bit of unconventional bathroom-hygiene advice, which he acknowledged can only do so much to protect you: If you find yourself in a public restroom with a lidless toilet, he said, consider washing your hands before you flush. Then “hold your breath, flush the toilet, and leave.”

The Hunt for a Housing Villain

The Atlantic

www.theatlantic.com › ideas › archive › 2023 › 01 › housing-crisis-hedge-funds-private-equity-scapegoat › 672839

In reporting on the housing crisis, I often hear some version of a simple story purporting to explain why so many Americans struggle to afford a place to live. The story goes like this: Housing costs are unaffordable because [INSERT BAD COMPANY HERE] is greedy and jacking up prices. The villain can be Airbnb or developers; it can be deep-pocketed foreigners or iBuyers. The story is compelling because it does not directly implicate regular people, sympathetic institutions, or elected officials.

To state the obvious, stories can be compelling without being true. Especially suspect are stories that scapegoat a group or an entity that is impossible or at least very difficult to defend: banks or oil companies or criminals, say. The scapegoat takes the blame for a complex problem. The trick is to cast a villain such that the surrounding facts become irrelevant. Who cares whether criminals have actually destroyed American cities? Attempting to stress-test theories like this just makes you look pro-crime and puts you on the same side as people who have committed terrible acts. But false narratives are dangerous because they distract attention from real problems, and plausible solutions.

The latest version of the housing-villain story targets private-equity firms and hedge funds, broadly “institutional investors” that have supposedly been outcompeting regular homebuyers and are therefore responsible for the skyrocketing rents and home prices of 2020 and 2021. “One of the largest hedge funds, the largest Wall Street firms in the world, is going around and buying up every single-family home in this country,” J. D. Vance argued at the start of his senatorial campaign in 2021, noting that first-time homebuyers, disproportionately Black Americans, were unable to become homeowners as a result.

I don’t want to be hyperbolic, but the idea that these firms are ultimately responsible for our housing-affordability crisis is absolutely ridiculous, and no one who knows anything about housing markets believes it. Yet this story has gained so much traction that it has spawned hearings and bills on Capitol Hill. One recent effort by Senator Jeff Merkley of Oregon seeks to levy high taxes on any company owning more than 100 single-family homes, in order to push it to sell those homes to owner-occupants or smaller investors. I asked Merkley what drew his attention to hedge-fund activity in the housing market, and he told me that he had “started to hear from people in the neighborhood saying, ‘Here’s the problem: We’re competing when we’re looking for a home; we’re competing against all-cash offers from businesses’ … It brought me back to thinking about whether we should have American families having to compete against billionaires to have a place to rent or to buy.”

[Jerusalem Demsas: Housing breaks people’s brains]

In order to have the type of pricing power that would allow any entity to push up rents and home prices, it would need to own significant shares if not an outright majority of homes in a particular market. At the national level, this is obviously not happening. According to one report, institutional investors purchased just 3 percent of homes sold in 2021. At the state level, the story seems unlikely as well. Georgia, a state with a relatively high amount of investor activity, saw some 8.5 percent of 2021 home sales go to the largest investors, according to CoreLogic data. In Merkley’s home state, just 2 percent of sales went to “mega-investors,” who own 1,001 or more properties. But 8 or 2 percent of home sales doesn’t mean 8 or 2 percent of the total housing stock—far from it. After all, most homes aren’t up for sale; from year to year, a great majority of homes remain in the same hands. Further, a purchase does not mean a permanent holding. Investors in both states quite likely went on to sell some of these homes.

At any rate: Home prices and rents increased quickly across the country, in communities large and small. When trying to determine what is responsible for this phenomenon, you have to find an explanation that is common to all of these places, not one that is particular to this market or that one. From August 2020 to August 2021, Nevada, Arizona, Utah, Montana, and Idaho, saw the most significant home-price increases, but of those states, just the first two saw relatively high rates of mega-investors, again according to CoreLogic data. (2021 data shows that Arizona saw the highest at roughly 8.9 percent of homes on the market going to mega-investors.)

Additionally, some proponents of the scapegoat story argue that even if institutional investors are not dominant at the state level, they could still be distorting local real estate. Someone looking for a three-bedroom single-family home in the suburbs of Atlanta is not equally satisfied with one in the Savannah suburbs, so what matters to that person is the local context. But just because something is theoretically possible doesn’t mean it’s actually happening. And these theories imbue investors with a mastermind quality that they frankly haven’t earned. For instance, fearmongering about Zillow buying up real estate fell flat when the company exited the market after off-loading many homes at a loss.   

If there are no solid data supporting the institutional-investor-scapegoat story, there are certainly plenty of misleading statistics. Here’s one egregious example: A report from the House Financial Services Committee reads that “in the third quarter of 2021 alone, institutional investors bought 42.8% of homes for sale in the Atlanta metro area and 38.8% of homes in the Phoenix-Glendale-Scottsdale area.” These are unbelievably big numbers, and they are—literally unbelievable, that is. The citation provided in the document was not correct, but I was able to find the relevant report and, wouldn’t you know it, that’s not what it says. The report shows only the share of purchases made by investors, not institutional investors. Why does this matter? Because investors include people or entities who own fewer than 10 properties, midsize investors who own 10 to 99 homes, iBuyers—which buy properties and then immediately resell them—and even people who purchase vacation homes through an LLC. Relatedly, a New America report last year of investor activity in North Carolina suggests that investor growth in that market is actually being driven by smaller players.

I’ve seen this type of bait and switch more times than I can count. Instead of being clear that institutional investors make up just a small fraction of total investor purchases, politicians conflate statistics, tangling up true facts with a predetermined story. At an event on the rise of institutional investors, Marcia Fudge, the secretary of the U.S. Department of Housing and Urban Development, noted that in Cleveland’s eastern inner-ring suburbs, “investors have purchased nearly ⅓ of homes every year since 2015.” This is not as blatant as the House committee report, because Fudge was careful to say merely “investors.” But in the context of her remarks, given at an event titled “Institutional Investors in Housing,” the implication was that private-equity firms or hedge funds were taking over Cleveland.

[Annie Lowrey: The U.S. needs more housing than almost anyone can imagine]

This bait and switch matters. First, because it reveals a lack of rigor when people find data to fit a preordained narrative instead of looking to determine what is actually happening. Second, because if these homes are being bought by a wide range of investors, this reduces even further the likelihood that any single investor has significant enough market share to mess with prices.

The other deceptive part of the latest scapegoat story is that these institutional investors are regularly outbidding homebuyers with all-cash offers. Although all-cash offers are certainly on the rise, many of these bids are from wealthy people, house flippers, or smaller landlords. And one survey of realtors found an average “0% difference in offer price of institutional buyers compared to other buyers.” In 2021, according to a recent report, the “median purchase price of institutional buyers [was] typically 26% lower than the states’ median purchase prices,” suggesting that they are not typically competing with ordinary individual buyers, anyway. Institutional investors tend to specialize in distressed communities. In these markets, they can take advantage of economies of scale in making repairs.  

There are real problems with corporate landlords. For instance, large corporate investors are significantly more likely to file eviction notices “even after controlling for past foreclosure status, property characteristics, tenant characteristics, and neighborhood,” according to a study of Fulton County, Georgia.  As the sociologist Esther Sullivan has argued, corporate investors may also take advantage of mobile-home owners, who tend not to own the land beneath their unit, by escalating fees for the maintenance of park properties.

These problems are worth solving by, say, increasing resources for code enforcement so that landlords of all stripes are held accountable for not keeping their properties habitable. Local governments should also  create rental registries that can track important information about properties and landlords to allow for both careful study and accountability of bad actors. The urban-policy expert Bruce Katz and his co-authors have also recommended that states require LLCs to disclose beneficial owners—anyone who owns more than 25 percent of the entity.

But if some institutional investors make bad landlords, that doesn’t mean they’re behind the housing-affordability crisis. They are not why rents are so high or why homeownership is out of reach for so many. Investors are not driving the unaffordability; they are responding to it. Many different investors are all flocking into the housing market; what is most relevant is the fundamental reason  they are all being drawn there.

Housing is primarily unaffordable in this country because of persistent undersupply. In fact, institutional investors are entering the single-family-home market precisely because supply constraints have led to skyrocketing prices. One institutional investor’s SEC filing admitted just that, celebrating a “decline” in supply that has “driven strong rental rate growth and home price appreciation.” The filing also lamented the possibility that “continuing development … will increase the supply of housing and exacerbate competition for residents.”  

A lack of supply is caused by a complex web of rules and regulations that prevent developers—profit and nonprofit alike—from building enough housing to meet demand. A recent report from Freddie Mac estimates a shortage of 3.8 million housing units. For decades the United States has been underbuilding in employment hubs (such as San Francisco, New York, and Boston) and the surrounding suburbs, pushing prices up. Elected officials have allowed the home-building process to become hijacked by unrepresentative opposition and gummed up in legal challenges, many under the guise of bogus environmental concerns.

If elected officials want to fix the problem, they should eliminate those constraints, such as regulations that require large structures on large lots of land or bans on duplexes, triplexes, and multifamily buildings. And they should curtail the various legal pathways that are used to obstruct new housing. As the Brookings Institution expert Jenny Schuetz explained to the House Financial Services Committee last summer: “Targeting a small subset of landlords without addressing underlying market conditions and policy gaps will not meaningfully improve the well-being of renters and prospective homebuyers.”  

[M. Nolan Gray: How California exported its worst problem to Texas]

As I’ve followed the scapegoat story, I’ve also been struck by the implicit suggestion that renters are less worthy of single-family homes than owner-occupants are. After all, corporate landlords rent to real people. In his announcement speech, Vance made the implicit explicit, arguing, “If you can’t own a home in your community, you’re not a real citizen.” And Merkley’s bill, which hopes to transfer single-family-rental homes to owner-occupants, skates past what its success would mean for renters. One report indicates that 85 percent of single-family-rental residents would not qualify for a mortgage.

I asked Merkley’s office what would happen to the families renting these properties if his bill were to pass and large investors were forced to sell them off. His office pointed me to a provision that would create down-payment assistance for potential homebuyers, and argued that pushing investors out of the market would reduce rents. But down-payment assistance doesn’t change the fact that most of these renters don’t have the credit score to qualify for a mortgage, nor would the assistance necessarily go to the families settled in these homes now. And I hope by this point it’s clear that even if institutional investors exited these markets, that would not make a dent in home prices or rents. Notably, a similar policy in Hong Kong led to a reduction in short-term speculation but did “not effectively cool down housing prices.”

Private equity isn’t the first villain, and it likely won’t be the last, to be cast in the role of the housing scapegoat. Airbnb, foreign buyers, greedy developers—all of these groups have taken center stage and probably will again. Nobody needs to defend these entities, but playing whack-a-mole with the villain of the moment won’t increase the amount of affordable housing we build, it won’t untangle the uncomfortable matrix of interests that opposes change and growth and opportunities for first-time homebuyers, and it won’t satisfy the growing anger of the tens of millions of Americans spending more than 30 percent of their income on housing.

The political project of building enough affordable housing and enacting necessary tenant protections is a hard one. Don’t let make-believe villains distract you from the real solutions to the housing crisis. We have to build.

Top Oscar pick is absurd and exhilarating

CNN

www.cnn.com › 2022 › 04 › 21 › opinions › everything-everywhere-all-at-once-fiction-of-asian-america-yang › index.html

In the movie "Everything Everywhere All at Once," iconic actress Michelle Yeoh -- whom you've surely seen in "Shang-Chi," "Crazy Rich Asians," "Crouching Tiger, Hidden Dragon" and, if you're lucky, a slew of Hong Kong action masterpieces -- plays Evelyn Wang, a hardworking Asian American midlifer dealing with the overwhelming demands of an aging parent and a high-maintenance child. It's a story that feels like nonfiction, because many of us (myself included!) are actually living it.

Tickets selling fast as Hong Kong-China high-speed rail link reopens ahead of Lunar New Year travel rush

CNN

www.cnn.com › travel › article › hong-kong-china-high-speed-rail-reopen-tickets-intl-hnk › index.html

After being shut for nearly three years because of the pandemic, the 26 kilometer (16 mile) high-speed rail link between Hong Kong and mainland China is finally reopening this weekend. But tickets are hard to come by with only 10,000 for sale daily -- 5,000 each way.