Iron nanoparticles can help treat contaminated water – our team of scientists created them out of expired supplements

Source: The Conversation – USA – By Ahmed Ibrahim Yunus, Ph.D. Candidate in Environmental Engineering, Georgia Institute of Technology

Scientists used pharmaceutical waste to create a new material with interesting properties. Mitrija/iStock via Getty Images

Today, approximately 1,800,000 acres of land in the United States is used for landfill waste disposal. In terms of volume, the U.S alone generated over 290 million tons of solid waste in 2018, an amount equivalent to about 235,000 Olympic-size swimming pools, assuming an average solid waste density of a half ton per cubic meter.

Roughly 9% – about 26 million tons – of this waste is made up of iron and steel. These are resources with a stable market value used in various civil infrastructure projects. As a team of environmental engineers, we wanted to know whether we could use iron-rich waste to produce iron oxide nanoparticles – a useful tool for combating water pollution and building engineering hardware.

All about nanoparticles

Iron oxide nanoparticles consist of iron and oxygen atoms and, because of their size, they exhibit unique physical and chemical properties. They are extremely small, typically at the nanoscale – one-billionth of a meter – in diameter.

The iron oxide nanoparticles we synthesized were a distinctive group called magnetite and maghemite. Initial studies have shown that nanoparticles in this group could help drugs get to the right part of the body, make batteries in electric vehicles more efficient and improve sensors for detecting toxic gas, as well as sound and motion.

Because these nanoparticles are made of iron, they’re both magnetic and stable. Their tiny size gives them a large surface area relative to their volume, allowing them to grab pollutants in water. Additionally, their magnetic nature makes them ideal for building extremely small and thin electrical components.

In our work, we wanted to find a new way to produce them using waste materials. In our newest study, published in the RSC Sustainability journal, we developed an eco-friendly method to synthesize iron oxide nanoparticles from expired over-the-counter iron supplements. This approach not only gives value to discarded products but also supports a more sustainable and circular method of production.

The research process

To conduct our study, we used a method called hydrothermal carbonization to produce these magnetic nanoparticles. We were able to source a large amount of expired iron supplements from a local health care center.

The hydrothermal carbonization process uses a turbocharged version of the kind of pressure cooker you might have in your kitchen. For our recipe, we combined 20 grams each of expired iron supplements and water in a specialized pressure reactor. We then cooked the mixture at 527 degrees Fahrenheit (275 degrees Celsius) for six to 12 hours. Under this intense temperature and pressure, the supplements broke down, which produced tiny – 10- to 11-nanometer – particles.

The end product included a solid charcoal-like material called hydrochar, which made up about 20% to 22% of the product. The hydrochar consisted of the iron oxide nanoparticles and graphite, a carbon-rich material that gave the hydrochar its charcoal-like look. The rest became gas and a dark, tarlike liquid separate from the hydrochar.

Hydrothermal carbonization is not the only method used to make iron oxide nanoparticles. There are other conventional methods such as coprecipitation, which involves mixing chemicals to form solids. Another method is pyrolysis, where materials are heated in the absence of oxygen. And finally, gasification, which heats materials in the presence of oxygen.

These methods usually require a higher energy input, around 1,292 to 1,832 degrees Fahrenheit (700 to 1,000 C), or harsh salt chemicals. In contrast, hydrothermal carbonization, the method we used, is water-based and can happen at a low temperature.

A diagrom showing the research process -- in the first column, the creation of the particles from expired supplements, in the 2nd, three tests the researchers run, and in the third, potential applications including sensors, semiconductors, treating water
Initial research shows that nanoparticles created from iron clears some pollutants from wastewater. After creating the nanoparticles, researchers test them using a variety of scientific techniques. The nanoparticles have several potential future applications in the technology field.
Ahmed Yunus

We compared our hydrothermal carbonization process’s energy use with other methods and found it had the lowest environmental impact.

From polluted water to clean

The iron oxide nanoparticles we created are very useful for water treatment. They are particularly good at removing oil and heavy metals such as lead, cadmium, zinc and chromium from water. These are pollutants known to cause serious health issues, including cancer.

You can either mix them with polluted water or allow the water to pass through them, similar to a common household filter.

To test their performance, we mixed our iron oxide nanoparticles in wastewater samples containing methylene blue dye, a common pollutant in textile and manufacturing wastewater. We found they removed over 95% of the dye, and because the particles are magnetic, we could remove them from the treated water using a magnet so they didn’t contaminate the water.

Two vials of water, one a bright blue and one more clear.
Water polluted with methylene blue cleared up after treatment with iron oxide nanoparticles over 48 hours, and the nanoparticles attach to a magnet.
Yunus et al., 2025

Depending on the type of pollutants in the water, iron oxide nanoparticles can sometimes be reused after they’re heated again.

Moving forward

We produced a small amount of these nanoparticles in the lab for this study. However, large quantities of iron waste are sent to landfills. These include materials such as steel sludge and metal scraps. So in theory, many more of these nanoparticles could be produced in the future. If produced in large enough quantities, large water and wastewater plant filtration systems could use these particles to treat much larger amounts of water.

But landfill waste isn’t all one type of waste. Iron-rich waste may be contaminated with other materials, making its sourcing, sorting and recycling both resource-intensive and costly. To scale up this technology sustainably, researchers will need to first overcome these challenges.

On the bright side, economists predict that alternative metals, including iron oxide nanoparticles, may help meet production demands for future technologies and artificial intelligence. These nanoparticles can be used to manufacture high-performance computing components. These components include magnetic memory storage and semiconductors found in our everyday technologies.

Lots of the critical metals currently used are expensive, scarce or geopolitically sensitive: cobalt, nickel and lithium. As a result, our team is starting to explore how this hydrothermal carbonization-based method can be scaled and applied to other types of waste materials.

Our long-term goal is to expand the tool kit for sustainable nanoparticle production while continuing to address both environmental challenges and materials demands for future innovations.

The Conversation

Ahmed Ibrahim Yunus receives funding from Georgia Tech Renewable Bioproduct Institute and the United States Department of Energy. This research project was headed by Dr. Samuel Darko while supported by Dr. Yongsheng Chen and Dr. Joe F. Bozeman III.

Joe Frank Bozeman III receives funding from the Georgia Institute of Technology’s Renewable Bioproduct Institute.

ref. Iron nanoparticles can help treat contaminated water – our team of scientists created them out of expired supplements – https://theconversation.com/iron-nanoparticles-can-help-treat-contaminated-water-our-team-of-scientists-created-them-out-of-expired-supplements-260364

History shows why FEMA is essential in disasters, and how losing independent agency status hurt its ability to function

Source: The Conversation – USA (2) – By Susan L. Cutter, Distinguished Professor of Geography and Director of the Hazards Vulnerability & Resilience Institute, University of South Carolina

FEMA workers help residents who lost homes in the 2025 Los Angeles wildfires apply for aid. Allen J. Schaben/Los Angeles Times via Getty Images

When the head of the Federal Emergency Management Agency’s urban search and rescue team resigned after the deadly July 4, 2025, Texas floods, he told colleagues he was frustrated with bureaucratic hurdles that had delayed the team’s response to the disaster, acccording to media reports. The move highlighted an ongoing challenge at FEMA.

Ever since the agency lost its independent status and became part of the Department of Homeland Security in the early 2000s, it has faced complaints about delays caused by layers of bureaucracy and red tape, leaders at the top with little experience in emergency response, and whiplash policy changes.

Now, the Trump administration is cutting jobs at FEMA and talking about dismantling the agency, which would push more responsibility for disaster response to the states.

Yet, federal emergency management is crucial in America.

I run the Hazards Vulnerability & Resilience Institute at the University of South Carolina and for years have worked with states and communities facing hazards and disasters. To better understand FEMA’s value, let’s take a look back at how the nation responded to disasters before the agency existed, and what history reveals about when FEMA was most effective.

Disaster response without the US government

Before 1950, disaster relief and response were not considered a federal responsibility. When a hurricane, flood or tornado hit, community members and humanitarian groups, such as the American Red Cross or Salvation Army, brought in food, shelter and medical aid and solicited charitable donations to help people rebuild.

State and local governments had primary responsibility for disaster response. But mostly people relied on family, neighbors and charity.

Three men ride on the outside of a car going through floodwater all around it.
The water stretched for miles during the Great Mississippi River Flood. This highway, between the cities of Mounds and Cairo, Ill., was flooded on March 25, 1927.
Archival Photography by Steve Nicklas, NOS, NGS.

Federal aid was approved on a case-by-case basis. War Department guidelines in 1917 stated that aid would be allowed only if a senior military officer certified that responding to the disaster would exceed local and state resources.

Then the Great Mississippi Flood of 1927 and the 1930s Dust Bowl gave new meaning to the concept of disaster in America.

In 1927, the Mississippi River broke through its levees, submerging more than 1 million acres of land across seven states. An estimated 700,000 people were displaced from their homes and workplaces.

Rows of tents with people sitting in front of them.
Thousands of people displaced by the 1927 Mississippi River flood stayed in tents set up by the federal government, like at this refugee camp on high ground in Vicksburg, Miss.
Historic NWS Collection/NOAA via Wikimedia Commons

Herbert Hoover, then U.S. commerce secretary, was given full authority to create, coordinate and carry out the federal relief effort. The Red Cross set up camps using tents provided by the War Department. Coast Guard and Navy boats rescued people stranded by flooding. But the response drew criticism for the lack of direct federal money to help flood survivors and the treatment of Black sharecroppers and laborers.

A few years later, the droughts of the Dust Bowl era began destroying crops in the Great Plains, causing widespread damage.

Federal disaster aid begins to take shape

After the flood, the federal government began to formalize its role in disaster management.

Flood control projects became a federal responsibility with the passage of the Flood Control Act of 1928. President Franklin D. Roosevelt’s New Deal provided emergency relief to farmers in the Great Plains and set up the Soil Conservation Service to help them reduce the effects of future droughts. These were among the first disaster mitigation policies at the federal level.

A farmer tends a young tree.
A farmer in Pratt, Kan., tends to trees planted as part of a Soil Conservation Service effort to help prevent soil from blowing during the Dust Bowl.
AP Photo

There was little coordination among agencies, however. Various aspects of disaster relief and recovery were handled by the departments of Defense, Agriculture, and Housing and Urban Development and the Small Business Administration. Each had its own rules and requirements.

In 1950, Congress passed the Federal Disaster Relief Act, establishing the first permanent authority for federal disaster relief.

The act gave the president the responsibility to determine how aid would be distributed and which agencies would be involved. The legislation also broadened the federal mission to include disaster preparedness and mitigation and formalized the process for issuing presidential disaster declarations.

The creation of FEMA

By the 1970s, large-scale disasters such as hurricanes Betsy (1965) and Camille (1969), and the fragmented disaster response, led the National Governors Association to call for a single comprehensive emergency management agency. Its report provided the blueprint for President Jimmy Carter’s 1979 executive order that established the Federal Emergency Management Agency, or FEMA.

The new agency became the home for emergency management within the executive branch. It was intentionally designed as an independent federal administrative agency that could work across federal agencies to support state and local governments in times of crisis.

People around a table, several with government agency logos on their clothes.
FEMA Director James Lee Witt, second from left, and other federal officials meet with New Jersey Gov. Christine Todd Whitman, Sen. Frank Lautenberg and Rep. Marge Roukema to discuss disaster recovery aid following Hurricane Floyd in 1999.
Andrea Booher/FEMA News Photo

FEMA wasn’t created to lead the disaster response. Instead it helps state and local officials by mobilizing federal resources, such as search and rescue, debris removal and funding when a disaster overwhelms the state’s capacity. FEMA could do this quickly because of established federal contracts and its ability to move equipment and responders into the region before a disaster hits.

When things began to fall apart

However, FEMA’s ability to act fast changed after the Sept. 11, 2001, terrorist attacks. The agency was restructured as a unit in the newly formed Department of Homeland Security. But the Department of Homeland Security’s focus was on terrorism and law enforcement, not natural disasters.

The loss of autonomy and direct reporting to Congress, unfunded mandates outside the scope of the 1988 Stafford Disaster Relief and Emergency Assistance Act, and major increases in the number of large and complex disasters stretched FEMA’s capabilities.

When Hurricane Katrina hit New Orleans in 2005, FEMA’s response drew widespread criticism. It was slow to deploy people and supplies and lacked enough experienced responders who knew what to do. Decision-makers were not familiar with new national response plans. Further breakdowns in communications and a lack of coordination among agencies led Congress to declare the Hurricane Katrina response a failure of initiative and agility.

A woman with a Red Cross T-shirt talks to an evacuee holding a baby and sitting on a cot in the Superdome football stadium. The floor is filled with cots and people.
A Red Cross volunteer talks with a woman whose home flooded during Hurricane Katrina in 2005. The Superdome was turned into an evacuation center and drew widespread complaints about cleanliness and safety.
AP Photo/Andrea Booher

FEMA’s reputation improved after the government brought in more experienced leadership and committed to preparedness planning and better response capabilities.

However, the first Trump administration, from 2017 to 2021, reversed those gains. Three different heads of FEMA in four years led to understaffing and conflicting directions.

FEMA had to battle misinformation during Hurricane Helene in 2024, including some amplified by then-presidential candidate Donald Trump.

As Trump took office for the second time in 2025, he and his administration talked about dismantling FEMA and pushing more disaster management to states. Job cuts and resignations at FEMA reduced the number of employees with training and experience vital in disasters. Political appointees to senior roles in the agency and in the Department of Homeland Security lacked emergency management training and experience.

A new policy that all purchases over US$100,000 be personally approved by Homeland Secretary Kristi Noem led to more resignations. For disaster response, a delay in waiting for a signature to work its way up the chain can cost lives.

What now?

Dismantling FEMA and leaving little or no federal coordination of disaster response puts states in a difficult position.

States must balance their budgets every year, and increasingly “rainy day” funds are insufficient to cover unexpected large disasters. As the federal government shifts other financial responsibilities to states, funds will diminish further.

A single disaster can cause hundreds of millions of dollars in damage and require widespread disaster response and then relief efforts. Since 1980, the cumulative cost of weather-related disasters has exceeded $2.9 trillion. With a warming atmosphere producing more intense storms, increasing human and economic harm are likely.

Members of Congress have proposed making FEMA an independent, Cabinet-level agency again. I see some distinct advantages in doing so:

  • Fewer management layers would enable faster deployment of federal supplies and personnel to assist disaster response.

  • A streamlined, more nimble agency could cut red tape for disaster survivors needing assistance, meaning delivering relief funding faster and more equitably.

  • If an independent FEMA had responsibility for recovery beyond its current 180-day reimbursement limits, that could improve long-term recovery efforts, especially if Congress provided permanent funding streams and consistent rules and regulations.

The Trump administration’s efforts to dismantle FEMA are shortsighted in my view. Instead, I believe the best move is to restore FEMA as an independent executive agency as it was originally envisioned.

The Conversation

Susan L. Cutter receives funding from the U.S. National Science Foundation.

ref. History shows why FEMA is essential in disasters, and how losing independent agency status hurt its ability to function – https://theconversation.com/history-shows-why-fema-is-essential-in-disasters-and-how-losing-independent-agency-status-hurt-its-ability-to-function-262477

Trump has promised to eliminate funding to schools that don’t nix DEI work – but half of the states are not complying

Source: The Conversation – USA (2) – By Hilary Lustick, Associate Professor of Education, UMass Lowell

While other presidential administrations have issued ‘Dear Colleague’ letters to schools, the Trump administration is the first to treat the letter like a law that mandates action. iStock/Getty Images Plus

It’s been about six months since the U.S. Department of Education sent a “Dear Colleague” letter to all schools that receive federal funding, warning them that they could risk losing this money if they promote what the department calls “pervasive and repugnant” racial preferences.

The letter, among other things, reversed previous presidents’ positions on how diversity, equity and inclusion influences schools’ disciplinary measures. It advised schools to, within two weeks, begin to eliminate all discipline protocols rooted in DEI, on the grounds that this work is discriminatory against white students.

Trump also issued an executive order, “Reinstating Commonsense School Discipline Policy,” in April 2025, doubling down on the letter.

Trump’s letter and executive order exert an unusual level of influence over how schools can decide the best way to teach and, when necessary, discipline students. It also cuts against recognized research that Black, Latino and Native American students are disciplined more frequently and harshly than white and Asian students.

I am an educational scholar who has spent the past 13 years analyzing school discipline policy. While previous administrations have issued “Dear Colleague” letters to schools, Trump’s is the first that frames itself as though it were law – setting a potential new precedent for the executive branch to issue educational mandates without the approval of the judicial or congressional branches of government.

While all but two states have responded to Trump’s letter, about half of them have said they are not going to comply with its terms – despite the administration’s threat of cutting funding if they do not follow the guidance.

An older man with white hair and a black blazer holds up a folder with paper inside it and faces an older woman wearing a light blue suit.
President Donald Trump displays an executive order on education alongside Secretary of Education Linda McMahon on March 20, 2025.
Associated Press

Understanding DEI in education

Equity-oriented education, or diversity, equity and inclusion, refers to an ideology and programming that intend to ameliorate patterns of racial inequality. In the context of discipline in schools, DEI strategies could include teachers having conversations with children about their behavior, rather than immediately suspending them.

Research shows that these techniques can help reduce racial discipline gaps in academic achievement and disciplinary outcomes.

The Obama administration in 2014 recognized this research in its own “Dear Colleague” letter to schools. The administration advised schools to either reform their discipline practices toward nonpunitive alternatives to suspension or risk being investigated for discrimination.

The first Trump administration rescinded this letter in 2018.

Then, in 2023, the Biden administration released a document along the same lines as Obama’s letter.

Trump’s February 2025 letter grouped all of these recommendations under the banner of “DEI” and argued that such practices are discriminatory, privileging students of color over white and Asian students.

In his April executive order, Trump reiterated that if schools did not eliminate DEI, they would be out of compliance with Title VI of the 1964 Civil Rights Act. This act prohibits discrimination on the basis of race, color or national origin,

Public school districts regularly have to issue a certificate of compliance to the government showing that their work is in line with Title VI.

While the Trump administration characterizes DEI as “smuggling racial stereotypes and explicit race-consciousness into everyday training, programming, and discipline,” it does not define exactly what constitutes DEI programming.

This puts school districts at risk of losing funding if they maintain any initiatives related to racial equality.

Legal concerns with Trump’s directives

The executive office and members of Congress typically issue “Dear Colleague” letters, which are not legally binding, to advise schools and others on policy.

Yet Trump’s letter was written like a mandate and reinforced by an executive order, which is legally binding.

Some scholars are calling the letter an “overreach” of legal authority.

In the spring of 2025, I analyzed states’ responses to Trump’s letter and executive order.

Two states, Iowa and Tennessee, had not yet provided public responses.

Twenty-three states complied with the administration’s directive by signing the letter as of May 30. Some, like Oklahoma, not only certified the letter but also passed state laws banning DEI policies and programs.

The remaining 25 states refused to certify the letter, asserting that they already complied with Title VI and that their policies are not discriminatory.

In addition, 19 of those 25 states sued the Trump administration over the letter in April, culminating in a court injunction later that month that temporarily released states from having to comply with its demands.

I noticed that many states that refuted Trump’s letter used the same exact words in their responses, signaling a concerted effort to resist Trump’s directives. States that did not sign on to the letter but objected to its intent generally resisted on legal grounds, ethics or both.

A legal argument

Most states that rejected it grounded their refusal to sign Trump’s letter in federal law. They cited the Civil Rights Act and the Paperwork Reduction Act, which protects states from having to file redundant paperwork. Because these states already certified compliance with Title VI, this argument goes, they should not have to do so again under Trump’s directive.

Education commissioners from a few states, including Illinois and Minnesota, also cited specific language used by Betsy DeVos, Trump’s former education secretary in his first term, who supported DEI policies.

Charlene Russell-Tucker, the education commissioner for Connecticut, also pointed out that in order for the federal government to cancel DEI programming, it would have to first legally change the definition of Title VI.

States resisting on other grounds

Some education officials also argued that their DEI work is ideologically necessary for providing supportive learning environments for all students.

Patrick Tutwiler, Massachusetts’ interim education commissioner, wrote in an April 16 letter, for example, that “Massachusetts will continue to promote diversity in our schools because we know it improves outcomes for all of our kids.”

Other officials displayed more subtle resistance. Randy Watson, Kansas’ education commissioner, for example, affirmed the state’s “commitment to comply with all Federal statutes,” including Title VI – but did not explicitly address Trump’s “Dear Colleague” letter.

Similarly, Kentucky informed the Department of Education of its compliance with federal law, while simultaneously encouraging local districts to continue diversity, equity and inclusion work.

Mississippi’s state department of education pointed out that school districts operate independently, so the state cannot force policies on them. However, Mississippi signaled compliance by citing a new state law banning DEI and confirmed that each of its individual school districts have already certified compliance with federal laws.

A middle-aged Black man wears a black blazer and white shirt and stands near a white woman with a navy blue blazer.
Massachusetts Secretary of Education Patrick Tutwiler, seen in Boston on March 7, 2025, is among the state education officials who have pushed back against Trump’s ‘Dear Colleague’ letter.
Jonathan Wiggs/The Boston Globe via Getty Images

More legal pushback

It is not yet clear what might follow the April court injunction, which largely prevented the Department of Education from cutting federal funding to schools that continued their DEI-related programs and policies.

While the Trump administration has made major cuts to the Department of Education, it has not announced that states refusing to certify the letter will lose funding.

This is the first time an administration is issuing such a direct threat to withhold K-12 funding, placing schools in an unknown place, without a clear blueprint of how to move forward.

The Conversation

Hilary Lustick does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. Trump has promised to eliminate funding to schools that don’t nix DEI work – but half of the states are not complying – https://theconversation.com/trump-has-promised-to-eliminate-funding-to-schools-that-dont-nix-dei-work-but-half-of-the-states-are-not-complying-260479

Insurance warning signs in doctors’ offices might discourage patients from speaking openly about their health

Source: The Conversation – USA (2) – By Helen Colby, Assistant Professor of Marketing, Indiana University

Have you ever noticed a sign in a doctor’s office saying that you may have to pay extra insurance costs if you discuss additional problems with your physician?

If so, you’re not alone. As health care spending continues to rise, providers are being asked to warn patients about any potential unexpected costs – for example, insurance charges for additional services at an otherwise fully covered annual wellness visit.

A sign labeled 'Attention: Important insurance information' reads 'Our office does NOT want you to be surprised by a bill, but we must ALWAYS report to your health plan the actual services rendered.'
The sign that inspired it all.
Helen Colby

But our research shows these warning signs could have an unintended consequence, discouraging patients from speaking openly with their doctors.

We are professors who research how people make spending decisions and were inspired to study this issue by real signs at a university-affiliated health care office. Other researchers have found many reasons why people hesitate to speak openly with their doctors, and we wondered whether these signs might be another factor. So we conducted some experiments.

In two studies, we found that when people saw an insurance warning sign, they were less willing to raise a wide variety of issues during a physical exam. These included both short-term issues such as headaches, fatigue and arthritis pain in the finger joints, and previously diagnosed, chronic conditions including high blood pressure, Type 2 diabetes and asthma.

In a third study, we tested whether it was what the sign said – or just the mere presence of a sign mentioning costs – that made people reluctant to speak up. We showed participants either no sign, an insurance warning sign, or a sign about a prescription drug discount program, which was also modeled after a real sign in the same doctor’s office. Only people who saw the insurance sign were less likely to speak up.

Why it matters

Frank conversations between patients and providers are essential for good health care. They allow providers to tailor medications, reduce side effects and find treatments that are right for each patient. What’s more, treating issues earlier rather than later generally leads to better outcomes and costs less in the long run.

We found that insurance warning signage, no matter how necessary or well intended, can discourage patients from sharing important health information. This could cause delays in important care, leading to unnecessary discomfort and stress as patients suffer with untreated issues.

Health care offices need to include certain insurance disclosures to inform patients of their rights under the No Surprises Act, which took effect in 2022. However, providers and administrators should be aware that their patients may often have cost concerns.

Doctors’ offices can try to find ways to communicate potential insurance costs while also encouraging patients to have open and honest discussions with their providers. The signage at the office that inspired this work had many words bolded and underlined, which may have made it feel especially aggressive to some patients.

It’s important for patients to know that they should never ignore symptoms. In fact, raising a concern as early as possible with a doctor or another health care provider can save more money down the road.

What still isn’t known

We weren’t able to study the long-term impacts of such signs, and it’s possible they have even more negative effects than we uncovered – for example, by making patients reluctant to have annual wellness visits.

It’s also unclear how often health care professionals actually report such conversations to insurers, especially when the issues are brought up briefly during a checkup and don’t require additional testing or treatment at that time.

But the research is clear on one point: When patients feel they can speak freely to their doctors, they get better care. That’s why doctors and other health care professionals should be aware that even well-intended warning signs may encourage patients to keep silent.

The Research Brief is a short take on interesting academic work.

The Conversation

Deidre Popovich has received grant funding from BlueCross BlueShield of Texas and Providence Health.

Helen Colby and Tony Stovall do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their academic appointment.

ref. Insurance warning signs in doctors’ offices might discourage patients from speaking openly about their health – https://theconversation.com/insurance-warning-signs-in-doctors-offices-might-discourage-patients-from-speaking-openly-about-their-health-262303

Youth athletes, not just professionals, may face mental health risks from repeated traumatic brain injuries

Source: The Conversation – USA (3) – By David B. Sarwer, Professor of Social and Behavioral Sciences, Temple University

Limiting the amount of physical contact in training can reduce young players’ head injury risks, research shows. Mint Images RF via Getty Images

On July 28, 2025, a 27-year-old gunman entered a New York City office building that is home to the National Football League’s headquarters. He shot and killed four people and injured one other before killing himself.

In a note found in his wallet, he claimed he had chronic traumatic encephalopathy, or CTE, a degenerative brain condition believed to develop from repeated traumatic brain injuries. He asked experts to study his brain.

CTE has received much attention over the past two decades as multiple NFL players have been diagnosed with the condition after their deaths. The 2015 movie “Concussion,” about a forensic pathologist named Dr. Bennet Omalu who documented the first case of CTE in an NFL player, also highlighted the issue.

The gunman in the New York City shooting played high school football, but he did not play professionally. It is not known whether he had CTE.

I’m a clinical psychologist who studies mental health issues and their relationship to physical illness. Although people generally associate CTE with professional athletes, a growing body of research, including my own work, shows that adolescents and young adult athletes experience traumatic brain injuries that can have both short-term and long-term effects on mental health. In my view, young players and their families, as well as coaches, should pay attention to these emerging risks.

A 27-year-old gunman who targeted NFL headquarters in New York City on July 28, 2025, believed he had chronic traumatic encephalopathy.

From traumatic brain injuries to CTE

At least 55 million people worldwide are thought to experience a traumatic brain injury each year. The actual number may be higher, as many brain injuries are never diagnosed or treated.

Some people with a brain injury recover quickly. Others do not. Over half of people with a brain injury reported mental health symptoms one year later. These include difficulties concentrating, memory problems and irritability, as well as physical concerns such as recurrent headaches and difficulties with balance. Many people who sustain a traumatic brain injury also report difficulties with anxiety, depression and substance misuse as they are recovering. Some report thoughts about ending their lives or suicide attempts.

Although the link between traumatic brain injuries and CTE is still being studied, many experts believe that the condition is caused not by a single, severe blow to the head but by repeated trauma to the head over time.

It is not uncommon for former competitive athletes across a range of contact sports to believe they may have CTE – not only because they remember the injuries or being diagnosed with a concussion, but also because they experience many of the cognitive symptoms that affect people with traumatic brain injuries and sometimes misuse alcohol, pain medications or other substances to cope with them.

However, there’s no way for someone to get a diagnosis for the condition while they are experiencing these symptoms. There is currently no test for CTE. Doctors generally diagnose it after an autopsy.

Repeated brain injuries in youth sports

The focus on CTE has brought greater interest in the effects of traumatic brain injuries in general. Such injuries are common not only in professional athletes but also in adolescents and young adults who play sports. They are seen frequently in military veterans as well.

In a study published in March 2025, my colleagues and I assessed more than 500 varsity and club sport athletes. We found that 75% said they had experienced a head injury before starting college. Almost 40% reported being diagnosed with at least one concussion, and just over half of those athletes experienced a loss of consciousness.

We also found that student athletes who had experienced head injuries were much more likely to be diagnosed with at least one psychiatric disorder in their lifetime. They were more likely to drink alcohol excessively and have a substance use disorder in their history. Greater symptoms of an alcohol use disorder were associated with having their first head injury at an earlier age, as well as having more head injuries, diagnosed concussions and losing consciousness from those injuries.

These troubling observations highlight the often overlooked mental health effects of head injuries in adolescents and young adults. Our study aligns with others that have found a relationship between sports-related traumatic brain injuries and mental health symptoms – and it is among the first to look not only at self-reported symptoms but also at formal psychiatric diagnoses.

How exactly these cases might relate to CTE is unknown, but there are hints of a link: Researchers examining the records of 152 former contact sport athletes who died before age 30 identified signs of CTE in the brains of 40% of them. Family members described mental health symptoms in the majority of them, and alcohol and substance misuse were reported in approximately one-third.

Increasing safeguards for brain health in young athletes

While head injuries in youth sports were once met with a shrug, youth sports leagues are increasingly paying attention to the issue.

Studies suggest that limiting the amount of physical contact in preseason training or between games can reduce young players’ head injury risks. Coaches of contact sports such as football and soccer often receive training on identifying the signs and symptoms of head injuries and are given strategies to manage them.

Athletic trainers, routinely available at many high school sporting events, are involved in sporting events for younger children as well. As first responders to athletic injuries, they are trained to assess symptoms of head injuries and can provide guidance, as part of a medical team, on when an athlete can return to play. Athletic trainers also may be well positioned to observe some of the mental health symptoms commonly seen after head injuries.

Following a head injury, parents and guardians should also keep an eye on their athlete. Changes in mood or behavior after a head injury warrant a referral to a neurologist or mental health professional for additional assessment and treatment.

The Conversation

The study was supported by a multi-project grant from the FY2015 Pennsylvania Commonwealth Universal Research Enhancement Program Formula Funding (PA CURE). .

ref. Youth athletes, not just professionals, may face mental health risks from repeated traumatic brain injuries – https://theconversation.com/youth-athletes-not-just-professionals-may-face-mental-health-risks-from-repeated-traumatic-brain-injuries-262207

The Druze are a tightly knit community – and the violence in Syria is triggering fears in Lebanon

Source: The Conversation – USA (3) – By Mireille Rebeiz, Chair of Middle East Studies, Dickinson College

Walid Jumblatt, the political leader of Lebanon’s Druze minority, speaks in Beirut on July 18, 2025. AP Photo/Bilal Hussein

Violence continues several weeks after clashes started between armed Bedouin clans, Sunni jihadist groups and Druze fighters on July 14, 2025, in Sweida, a city in southern Syria.

Hundreds of Druze were killed in the clashes, and Syria’s defense minister deployed forces to contain the sectarian fighting.

The Druze are a religious minority in the Levant, the region covering roughly modern-day Syria, Lebanon, Jordan, Israel and Palestinian territories. The faith originated in Egypt as an offshoot of the Fatimid tradition, a branch of Shiite Islam. Today, there are about 1 million to 1.5 million Druze worldwide, more than half of whom live in Syria. Most others live in Lebanon, Israel, Jordan and the Israeli-occupied Golan Heights.

We are experts in Druze and Lebanese history, and we know that the conflict in Sweida is regarded by the Druze of Lebanon – and the Druze everywhere – as a deeply personal matter.

What’s more, the horror stories coming out of Sweida are reverberating in Lebanon, where many Druze also fear the risk of sectarian violence, and distrust in current leadership.

Bonds forged through a long history

Many scholars attribute the strong bond between the Druze of Syria and Lebanon to their shared faith – which is partly true – but they often overlook an equally vital element: a collective conscience shaped by a distinctive origin story.

The Druze see themselves as an ancient, blood-related tribal coalition that evolved into an extended family spread across regions. This self-perception is so deeply rooted that it gave rise to a well-known Levantine saying: “The Druze are like a copper plate – wherever you strike it, it rings.”

According to local tradition, several Druze families from Mount Lebanon migrated to the Hawran region, south of Damascus, more than three centuries ago, paving the way for thousands of others to follow. Sweida is the capital city of the Druze region in Ḥawran. The region of Ḥawran is the second-youngest Druze settlement – after Jordan – dating back to the 18th century.

A foundational event in the community’s modern history was the Druze uprising in Ḥawran against the Ottoman governor of Egypt, Muhammad Ali Pasha, in 1837.

The governor had insisted on imposing conscription and disarmament on the Druze. The community rebelled since both measures would put their security and autonomy at risk, and the governor sent the army to occupy the Levant.

During the revolt, Druze from Mount Lebanon and Wadi al-Taym – a historical Druze region encompassing the modern-day Lebanese districts of Rashayya and Hasbayya in the southeast, near the Syrian border – rose up to divert the Egyptian army and sent fighters to support their Syrian kin.

In 1838, many of these Lebanese fighters were killed, particularly in what is known as the Battle of Wadi Bakka, near the Lebanese-Syrian border; an entire Druze battalion was besieged by the Egyptian forces and nearly wiped out.

In 1860, a third civil war involving the Druze under the Ottomans broke out in Mount Lebanon between the Druze and the Maronites. The Maronites are a group of Eastern Catholic Christians predominantly in Lebanon. The conflict centered on control of the southern regions of the mountain – historically known as the Druze Country.

As violence escalated between the two communities, the Druze of Ḥawran came to the aid of their fellow Druze in Mount Lebanon, tipping the balance in their favor.

During World War I, Mount Lebanon was hit by a famine and around 200,000 people died. The Druze of Ḥawran supported the Druze in Lebanon by supplying them with essential grain, and many Lebanese Druze resettled in Ḥawran to escape starvation.

These are just a few examples from a long history of mutual support that, in the Druze collective memory, reinforces the belief that they are not merely a community – but a tightly knit extended family that spans national borders.

Shifting borders

As a religious minority in the Levant, the Druze have long defended their religious freedom and identity.

The principalities in Mount Lebanon were most successful at realizing and keeping religious autonomy from at least the 12th century to the 19th century; they ensured the Druze were ruled by one of their own emirs and could practice their religious and social customs freely. The modern state of Lebanon evolved out of these autonomous principalities.

However, the Druze never viewed their struggle for social and religious autonomy as a license to attack their neighbors – especially fellow Arab Muslims – but rather as a safeguard for their faith and security.
The Druze do not equate religious freedom and autonomy with independence. In fact, many Druze in the region oppose the idea of a Druze state.

Starting in the 1930s, Zionist leaders hoping to create a Jewish state sought to exploit this Druze desire toward autonomy by proposing the creation of a Druze state in Ḥawran. They envisioned it as a friendly buffer state bordering the future state of Israel. More importantly, they wanted to push Druze out of Galilee and Mount Carmel knowing that they lived there for many centuries.

After the Six-Day War in 1967 between Israel and Egypt, Jordan and Syria, this idea expanded into a broader Israeli plan to fragment Syria and Lebanon into five sectarian states: an Alawite state in the north, a Christian state in the west, a Druze state in the south, a Kurdish state in the east and a Sunni state at the center.

Since Oct. 7, 2023, some Druze leaders – such as Walid Jumblatt, former minister, and head of the Progressive Socialist Party – have raised concerns that Israel could be attempting to revive this plan to reshape the region into a “New Middle East” with potentially new borders in Syria, Iraq, Lebanon, and the Palestinian territories. In fact, since the fall of the Assad regime in Syria, Jumblatt has been vocal about the rise of potential new borders.

Historically, the highest Druze religious authorities rarely engage in day-to-day politics. Yet, they are still expected to offer moral and political guidance during times of crisis, as the community sees them as guardians of faith, identity and ethics.

Several men, who are wearing white round hats, seem to be in deep conversation with one another.
Druze clerics take part in a gathering of minority religious leaders in Beirut on July 18, 2025.
AP Photo/Bilal Hussein

Recently, the leading Druze spiritual authority in Lebanon, Sheikh Amin al-Sayegh – who has been at odds with Jumblatt on internal communal affairs – voiced similar concerns in a public letter of condolence and support to the Syrian Druze. He emphasized the community’s Arab Islamic identity and warned against prioritizing material security over the historical Druze identity. Al-Sayegh’s stance reflects long-standing Druze political principles rooted in centuries of tradition.

The political message was clearly hinting at a rising tendency among some Druze, including Syrians, to consider stronger ties with Israel for security purposes.

Growing fear of sectarian violence

Lebanon has a long history of sectarian violence, and the recent events in Syria are indeed alarming to Lebanon’s religious minorities, including the Druze.

In March 2025, over 1,400 Alawite civilians were massacred, mostly in coastal cities like Latakia and Baniyas, by the newly formed Syrian forces.

In June, 25 Syrian civilians were killed and over 60 injured when a Sunni extremist group attacked the Greek Orthodox Church of the Prophet Elias in Damascus. And as of mid-July, Bedouin clans and the state security forces of the Sharaa regime have been targeting and killing Druze civilians in Sweida.

With numerous Bedouin tribes present in Lebanon, and tension evolving into an open sectarian confrontation, Druze leaders there fear that the sectarian violence could spill over into their own communities due to the Syrian Bedouins’ call for general mobilization of Arab tribes in the region against the Druze. This call is based on unverified reports of Druze killing Bedouin civilians.

Druze leadership in Lebanon

Despite growing frustration over Lebanon’s deepening economic crisis – partly attributed to political leadership – most Lebanese Druze remained loyal to traditional figures like Jumblatt, who was long viewed as the most capable guardian of their security and communal interests.

But the shock of recent violence in Sweida, where militias aligned with the Syrian regime targeted Druze civilians, has unsettled that loyalty. Many Lebanese Druze had expected their leaders to use their external influence to shield their kin across the border. The perceived failure to do so – combined with Jumblatt’s continued support for the regime led by President Ahmed al-Sharaa in Syria – has sparked widespread criticism within the community. Jumblatt himself acknowledged this strong criticism in a recent interview.

For many Druze, the brutal events in Sweida were fiercely traumatic and have forced them to painfully confront their long-standing core political priorities: security and the preservation of religious and social autonomy. And in light of this, some are beginning to reassess long-held assumptions that current leadership can preserve their religious autonomy and, more importantly, keep them safe.

The Conversation

Mireille Rebeiz is affiliated with the American Red Cross.

Said Abou Zaki does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. The Druze are a tightly knit community – and the violence in Syria is triggering fears in Lebanon – https://theconversation.com/the-druze-are-a-tightly-knit-community-and-the-violence-in-syria-is-triggering-fears-in-lebanon-261931

A red meat allergy from tick bites is spreading – and the lone star tick isn’t the only alpha-gal carrier to worry about

Source: The Conversation – USA (3) – By Lee Rafuse Haines, Associate Research Professor of Molecular Parasitology and Medical Entomology, University of Notre Dame

Steak and other red meats can trigger an allergic reaction in people with alpha-gal syndrome. Vicushka/Moment via Getty Images

Hours after savoring that perfectly grilled steak on a beautiful summer evening, your body turns traitor, declaring war on the very meal you just enjoyed. You begin to feel excruciating itchiness, pain or even swelling that can escalate to the point of requiring emergency care.

The culprit isn’t food poisoning – it’s the fallout from a tick bite you may have gotten months earlier and didn’t even notice.

This delayed allergic reaction is called alpha-gal syndrome. While it’s commonly called the “red meat allergy,” that nickname is misleading, because alpha-gal syndrome can cause strong reactions to many products, beyond just red meat.

The syndrome is also rapidly spreading in the U.S. and around the globe. The Centers for Disease Control and Prevention estimates as many as 450,000 people in the U.S. may have it. And it’s carried by many more tick species than most people realize.

A map shows the numbers of confirmed alpha-gal syndrome cases in a band from Oklahoma and Nebraska to Virginia and the Carolinas. There is also a collection in northern Minnesota and Wisconsin, and another in Florida.
Cases of suspected alpha-gal syndrome based on confirmed laboratory evidence.
CDC

What is alpha-gal syndrome?

Alpha-gal syndrome is actually an allergy to a sugar molecule with a tongue-twisting name: galactose-alpha-1,3-galactose, shortened to alpha-gal.

The alpha-gal sugar molecule exists in the tissues of most mammals, including cows, pigs, deer and rabbits. But it’s absent in humans. When a big dose of alpha-gal gets into your bloodstream through a tick bite, it can send your immune system into overdrive to generate antibodies against alpha-gal. In later exposure to foods containing alpha-gal, your immune system might then launch an inappropriate allergic response.

A reddish-brown tick with a large yellow spot on its back sits on a leaf.
A lone star tick (Amblyomma americanum) found near Aden, Va. The tick can cause alpha-gal syndrome as well as carry other diseases, including ehrlichiosis, tularemia and Southern tick-associated rash illness.
Judy Gallagher via Wikimedia, CC BY

Often this allergy is triggered by eating red meat. But the allergy also can be set off by exposure to a range of other animal-based products, including dairy products, gelatin (think Jell-O or gummy bears), medications and even some personal care items. The drug heparin, used to prevent blood clotting during surgery, is extracted from pig intestines, and its use has triggered a dangerous reaction in some people with alpha-gal syndrome.

Once you have alpha-gal syndrome, it’s possible to get over the allergy if you can modify your diet enough to avoid triggering another reaction for a few years and also avoid more tick bites. But that takes time and careful attention to the less obvious triggers that you might be exposed to.

Why more people are being diagnosed

As an entomologist who studies bugs and the diseases they transmit, what I find alarming is how rapidly this allergy is spreading around the globe.

Several years ago, experts thought alpha-gal syndrome was primarily limited to the southeastern U.S. because it was largely associated with the geographical range of the lone star tick.

A Maryland woman finds a lone star tick on her skin in 2017.
How a tick feeds.
National Institute of Allergy and Infectious Diseases via Wikimedia Commons, CC BY

However, both local and global reports have now identified many different tick species across six continents that are capable of causing alpha-gal syndrome, including the prolific black-legged tick, or deer tick, which also transmits Lyme disease.

These ticks lurk in yards and urban parks, as well as forests where they can stealthily grab onto hikers when they touch tick-infested vegetation. As tick populations boom with growing deer and human populations, the number of people with alpha-gal syndrome is escalating.

Why ticks are blamed for alpha-gal syndrome

There are a few theories on how a tick bite triggers alpha-gal syndrome and why only a small proportion of people bitten develop the allergy. To understand the theories, it helps to understand what happens as a tick starts feeding on you.

When a tick finds you, it typically looks for a warm, dark area to hide and attach itself to your body. Then its serrated teeth chew through your skin with rapid sawing motions.

As it excavates deeper into your skin, the tick deploys a barbed feeding tube, like a miniature drilling rig, and it secretes a biological cement that anchors its head into its new tunnel.

A magnified view of a tick's mouth.
A tick’s mouth is barbed so it can stay embedded in your skin as it draws blood over hours and sometimes days.
National Institute of Allergy and Infectious Diseases

Once secure, the tick activates its pumping station, injecting copious amounts of saliva containing anesthetics, blood thinners and, sometimes, alpha-gal sugars into the wound so it can feed undetected, sometimes for days.

One theory about how a tick bite causes alpha-gal syndrome is linked to the enormous quantity of tick saliva released during feeding, which activates the body’s strong immune response. Another suggests how the skin is damaged as the tick feeds and the possible effect of the tick’s regurgitated stomach contents into the bite site are to blame. Or it may be a combination of these and other triggers. Scientists are still investigating the causes.

What an allergic reaction feels like

The allergy doesn’t begin right away. Typically, one to three months after the sensitizing tick bite, a person with alpha-gal syndrome has their first, disturbing reaction.

Alpha-gal syndrome produces symptoms that range from hives or swelling to crushing abdominal pain, violent nausea or even life-threatening anaphylactic shock. The symptoms usually start two to six hours after a person has ingested a meat product containing alpha-gal.

Due to a general lack of awareness about the allergy, however, doctors can easily miss the diagnosis. A study in 2022 found that 42% of U.S. health care practitioners had never heard of alpha-gal syndrome. A decade ago, people with alpha-gal syndrome might go years before the cause of their symptoms was accurately diagnosed. Today, the diagnosis is faster in areas where doctors are familiar with the syndrome, but in many parts of the country it can still take time and multiple doctor visits.

Unfortunately, with every additional tick bite or exposure to food or products containing alpha-gal, the allergy can increase in severity.

Ticks at different ages and sexes compared to a dime (which is quite a bit larger).
The lone star tick isn’t the only one that can cause alpha-gal syndrome. Black-legged ticks have also been connected to cases.
U.S. Army

If you think you have alpha-gal syndrome

If you suspect you may have alpha-gal syndrome, the first step is to discuss the possibility with your doctor and ask them to order a simple blood test to measure whether your immune system is reacting to alpha-gal.

If you test positive, the main strategy for managing the allergy is to avoid eating any food product from a mammal, including milk and cheese, as well as other potential triggers, such as more tick bites.

Read labels carefully. Some products contain additives such as carrageenan, which is derived from red algae and contains alpha-gal.

In extreme cases, people with alpha-gal syndrome may need to carry an EpiPen to prevent anaphylactic shock. Reputable websites, such as the CDC and alphagalinformation.org, can provide more information and advice.

Mysteries remain as alpha-gal syndrome spreads

Since alpha-gal syndrome was first formally documented in the early 2000s, scientists have made progress in understanding this puzzling condition. Researchers have connected the allergy to specific tick bites and found that people with the allergy can have a higher risk of heart disease, even without allergy symptoms.

But important mysteries remain.

Scientists are still figuring out exactly how the tick bite tricks the human immune system and why tick saliva is a trigger for only some people. With growing public interest in alpha-gal syndrome, the next decade could bring breakthroughs in preventing, diagnosing and treating this condition.

For now, the next time you are strolling in the woods or in long grasses, remember to check for ticks on your body, wear long sleeves, long pants and tick repellent to protect yourself from these bloodthirsty hitchhikers. If you do get bitten by a tick, watch out for odd allergic symptoms to appear a few hours after your next steak or handful of gummy bears.

The Conversation

Lee Rafuse Haines is affiliated with the Liverpool School of Tropical Medicine as an Honorary Fellow.

ref. A red meat allergy from tick bites is spreading – and the lone star tick isn’t the only alpha-gal carrier to worry about – https://theconversation.com/a-red-meat-allergy-from-tick-bites-is-spreading-and-the-lone-star-tick-isnt-the-only-alpha-gal-carrier-to-worry-about-262428

EPA removal of vehicle emissions limits won’t stop the shift to electric vehicles, but will make it harder, slower and more expensive

Source: The Conversation – USA (2) – By Alan Jenn, Associate Professor of Civil and Environmental Engineering, University of California, Davis

Customers have embraced electric vehicles; policy changes may decrease that interest but will not eliminate it. Carlin Stiehl/Los Angeles Times via Getty Images

The U.S. government is in full retreat from its efforts to make vehicles more fuel-efficient, which it has been waging, along with state governments, since the 1970s.

The latest move came on July 29, 2025, when the Environmental Protection Agency said it planned to rescind its landmark 2009 decision, known as the “endangerment finding,” that greenhouse gases pose a threat to public health and welfare. If that stands up in court and is not overruled by Congress, it would undo a key part of the long-standing effort to limit greenhouse gas emissions from vehicles.

As a scholar of how vehicle emissions contribute to climate change, I know that the science behind the endangerment finding hasn’t changed. If anything, the evidence has grown that greenhouse gas emissions are warming the planet and threatening people’s health and safety. Heat waves, flooding, sea-level rise and wildfires have only worsened in the decade and a half since the EPA’s ruling.

Regulations over the years have cut emissions from power generation, leaving transportation as the largest source of greenhouse gas emissions in the U.S.

The scientific community agrees that vehicle emissions are harmful and should be regulated. The public also agrees, and has indicated strong preferences for cars that pollute less, including both more efficient gas-burning vehicles and electric-powered ones. Consumers have also been drawn to electric vehicles thanks to other benefits such as performance, operation cost and innovative technologies.

That is why I believe the EPA’s move will not stop the public and commercial transition to electric vehicles, but it will make that shift harder, slower and more expensive for everyone.

A multilane highway is packed with cars and trucks.
Transportation is the largest source of greenhouse gas emissions in the U.S.
Brandon Bell/Getty Images

Putting carmakers in a bind

The most recent EPA rule about vehicle emissions was finalized in 2024. It set emissions limits that can realistically only be met by a large-scale shift to electric vehicles.

Over the past decade and a half, automakers have been building up their capability to produce electric vehicles to meet these fleet requirements, and a combination of regulations such as California’s zero-emission-vehicle requirements have worked together to ensure customers can get their hands on EVs. The zero-emission-vehicle rules require automakers to produce EVs for the California market, which in turn make it easier for the companies to meet their efficiency and emissions targets from the federal government. These collectively pressure automakers to provide a steady supply of electric vehicles to consumers.

The new EPA move would undo the 2024 EPA vehicle-emissions rule and other federal regulations that also limit emissions from vehicles, such as the heavy-duty vehicle emissions rule.

The possibility of a regulatory reversal puts automakers into a state of uncertainty. Legal challenges to the EPA’s shift are all but guaranteed, and the court process could take years.

For companies making decade-long investment decisions, regulatory stability matters more than short-term politics. Disrupting that stability undermines business planning, erodes investor confidence and sends conflicting signals to consumers and suppliers alike.

An aerial view shows a very large building with an even larger parking lot outside, filled with cars.
Car manufacturers in the U.S. have invested large sums of money to produce electric vehicles.
Elijah Nouvelage/Getty Images

A slower roll

The Trump administration has taken other steps to make electric vehicles less attractive to carmakers and consumers.

The White House has already suspended key provisions of the Inflation Reduction Act that provided tax credits for purchasing EVs and halted a US$5 billion investment in a nationwide network of charging stations. And Congress has retracted the federal waiver that allowed California to set its own, stricter emissions limits. In combination, these policies make it hard to buy and drive electric vehicles: Fewer, or no, financial incentives for consumers make the purchases more expensive, and fewer charging stations make travel planning more challenging.

Overturning the EPA’s 2009 endangerment finding would remove the legal basis for regulating climate pollution from vehicles altogether.

But U.S. consumer interest in electric vehicles has been growing, and automakers have already made massive investments to produce electric vehicles and their associated components in the U.S. – such as Hyundai’s EV factory in Georgia and Volkswagen’s Battery Engineering Lab in Tennessee.

Global markets, especially in Europe and China, are also moving decisively toward electrifying large proportions of the vehicles on the road. This move is helped in no small part due to aggressive regulation by their respective governments. The results speak for themselves: Sales of EVs in both the European Union and China have been growing rapidly.

But the pace of change matters. A slower rollout of clean vehicles means more cumulative emissions, more climate damage and more harm to public health.

The EPA’s proposal seeks to slow the shift to electric vehicles, removing incentives and raising costs – even though the market has shown that cleaner vehicles are viable, the public has shown interest, and the science has never been clearer. But even such a major policy change can’t stop the momentum of those trends.

The Conversation

Alan Jenn does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. EPA removal of vehicle emissions limits won’t stop the shift to electric vehicles, but will make it harder, slower and more expensive – https://theconversation.com/epa-removal-of-vehicle-emissions-limits-wont-stop-the-shift-to-electric-vehicles-but-will-make-it-harder-slower-and-more-expensive-262384

When it comes to finance, ‘normal’ data is actually pretty weird

Source: The Conversation – USA (2) – By D. Brian Blank, Associate Professor of Finance, Mississippi State University

When business researchers analyze data, they often rely on assumptions to help make sense of what they find. But like anyone else, they can run into a whole lot of trouble if those assumptions turn out to be wrong – which may happen more often than they realize. That’s what we found in a recent study looking at financial data from about a thousand major U.S. companies.

One of the most common assumptions in data analysis is that the numbers will follow a normal distribution – a central concept in statistics often known as the bell curve. If you’ve ever looked at a chart of people’s heights, you’ve seen this curve: Most people cluster near the middle, with fewer at the extremes. It’s symmetrical and predictable, and it’s often taken for granted in research.

A one-minute introduction to the concept of the bell curve.

But what happens when real-world data doesn’t follow that neat curve?

We are professors who study business, and in our new study we looked at financial data from public U.S. companies – things like firm market value, market share, total assets and similar financial measures and ratios. Researchers often analyze this kind of data to understand how companies work and make decisions.

We found that these numbers often don’t follow the bell curve. In some cases, we found extreme outliers, such as a few large firms being thousands of times the size of other smaller firms. We also observe distributions that are “right-skewed,” which means that the data is bunched up on the left side of the chart. In other words, the values are on the lower end, but there are a few really high numbers that stretch the average upward. This makes sense, because in many cases financial metrics can only be positive – you won’t find a company with a negative number of employees, for example.

Why it matters

If business researchers rely on flawed assumptions, their conclusions – about what drives company value, for example – could be wrong. These mistakes can ripple outward, influencing business decisions, investor strategies or even public policy.

Take stock returns, for example. If a study assumes those returns are normally distributed, but they’re actually skewed or full of outliers, the results might be distorted. Investors hoping to use that research might be misled.

Researchers know their work has real-life consequences, which is why they often spend years refining a study, gathering feedback and revising the article before it’s peer-reviewed and prepared for publication. But if they fail to check whether data is normally distributed, they may miss a serious flaw. This can undermine even otherwise well-designed studies.

In light of this, we’d encourage researchers to ask themselves: Do I understand the statistical methods I’m using? Am I checking my assumptions – or just assuming they’re fine?

What still isn’t known

Despite the importance of data assumptions, many studies fail to report tests for normality. As a result, it’s unclear how many findings in finance and accounting research rest on shaky statistical grounds. We need more work to understand how common these problems are, and to encourage best practices in testing and correcting for them.

While not every researcher needs to be a statistician, everyone using data would be wise to ask: How normal is it, anyway?

The Conversation

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their academic appointment.

ref. When it comes to finance, ‘normal’ data is actually pretty weird – https://theconversation.com/when-it-comes-to-finance-normal-data-is-actually-pretty-weird-259365

Football and faith could return to the Supreme Court – this time, over loudspeakers

Source: The Conversation – USA (3) – By Charles J. Russo, Joseph Panzer Chair in Education and Research Professor of Law, University of Dayton

Private schools want to pray over the loudspeaker – at a public facility, during games run by a state association. John Coletti/Photodisc via Getty Images

With the start of another high school football season around the corner, a long-simmering dispute has heated up: prayers at games.

Kennedy v. Bremerton, the case of a high school football coach praying on the field after games, has been in the spotlight since the Supreme Court’s 2022 ruling. But another football controversy first emerged in 2015, when two Christian schools in Florida made it to the state championships. The games were run by the state’s high school athletic association, a government body.

Association officials barred the teams from conducting a joint prayer over the loudspeaker at the public stadium before kickoff. Allowing a prayer, they said, would violate federal and constitutional law. The First Amendment’s establishment clause forbids the government from establishing an official religion, from giving preference to a specific religion and from giving favor to or disfavoring religion in general.

Officials at one of the schools, Cambridge Christian, filed suit, arguing that banning the prayer violated its right to free speech and to the free exercise of religion. Lower courts entered orders in the association’s favor, but attorneys for the school petitioned the Supreme Court to hear the case.

As a faculty member who teaches and researches law relating to religion and education, I believe the justices are likely to take the case – and that its outcome could be consequential. I say this because the Supreme Court’s recent record in First Amendment cases has been more friendly to religious plaintiffs than ever in its history.

A police officer with his back to the camera stands outside the Supreme Court.
The Supreme Court is expected to announce this fall whether it will hear Cambridge Christian’s case.
AP Photo/Mariam Zuhaib

Government speech

Following multiple rounds of litigation, Cambridge Christian School v. Florida High School Athletic Association reached a federal appeals court in September 2024. The 11th Circuit unanimously affirmed an order upholding the association’s policy not to allow prayer over the public address system.

The 11th Circuit based its findings in its view that prayer would be a form of “government speech”: that it would be perceived as representing the state association, not just the Christian schools. While the First Amendment limits the government’s ability to regulate private speech, the government is free to regulate its own speech.

Therefore, the court held that association officials did not violate the school’s right to free speech or free exercise of religion.

In part, the 11th Circuit relied on a similar Supreme Court case from 2000, which also examined prayer at a high school football game: Santa Fe Independent School District v. Doe.

In the Santa Fe ruling, the justices invalidated a board’s policy of allowing prayer over the public-address system “by a speaker representing the student body, under the supervision of school faculty.” Such a policy violated the First Amendment’s establishment clause, they determined, because “an objective Santa Fe High School student will unquestionably perceive the inevitable pregame prayer as stamped with her school’s seal of approval.”

Endorsement test

According to reasoning known as the “endorsement test,” a message violates the establishment clause if someone listening would reasonably assume that the government is endorsing religion. This test originated in Lynch v. Donnelly, a 1984 dispute over a public Christmas display in a Rhode Island park owned by a nonprofit.

Recently, however, the Supreme Court explicitly rejected the endorsement test – potentially strengthening Cambridge Christian’s case. The court rejected it and a similar set of criteria, called the “Lemon test,” in another football-related case, 2022’s Kennedy v. Bremerton School District.

The majority opinion upheld the right of a football coach in a public high school, Joseph Kennedy, to pray silently on the field at the end of games. The justices explained that the establishment clause does not “require the government to single out private religious speech for special disfavor,” adding that the court “long ago abandoned Lemon and its endorsement test offshoot.”

A man with silver hair who is wearing a short-sleeved blue polo stands before microphones, as a half-dozen people stand around him.
Former assistant football coach Joseph Kennedy after his case, Kennedy vs. Bremerton School District, was argued before the Supreme Court on April 25, 2022.
Win McNamee/Getty Images

The Lemon test“ was the standard the Supreme Court had used since 1971 to evaluate interactions between the government and religion. Under Lemon, there were three key criteria for whether a law or government speech violated the establishment clause. To be permitted, a governmental action must have a secular purpose, and its main effect cannot either advance or inhibit religion. Lastly, the action “must not foster ‘an excessive government entanglement with religion.‘”

In Bremerton, repudiating Lemon, the justices declared that courts should instead assess establishment clause claims based on “historical practices and understandings.”

If the Supreme Court agrees to hear Cambridge Christian’s appeal, the justices will face two issues. The first is whether communal prayer over a loudspeaker before a state athletic association game is indeed government speech – especially because officials permitted a wide array of nonreligious private speech over the loudspeaker. The second issue is whether the endorsement factor of the government-speech doctrine revives the endorsement test.

Recent record

If the justices agree to hear Cambridge Christian, it must be viewed against the court’s recent history in disputes over religion. The majority has often been friendly toward religious plaintiffs in cases under both religion clauses of the Constitution: establishment and free exercise.

In recent years, for example, the justices allowed aid to faith-based school students, found that a board could not prevent Kennedy from praying silently on the field after games, and granted employees time off to worship.

Two important issues remain to be seen: first, whether the justices will continue expanding the boundaries of religious freedom; and second, whether Cambridge Christian will generate such a result.

Regardless of how the Supreme Court rules – and whether it does rule – Florida has already adopted a law requiring athletic associations to allow participating high schools “to make brief opening remarks, if requested … using the public address system at the event.”

Come fall 2025, the Supreme Court will decide whether to hear the case. If so, its judgment may clarify whether private speech using public PA systems becomes governmental speech. Because the 11th Circuit relied on the endorsement test that the Supreme Court expressly repudiated, it seems likely that the justices will hear the appeal and rule in Cambridge Christian’s favor.

If the court does agree to review Cambridge Christian, it may well expand the parameters of religious expression in public – not just at football games.

The Conversation

Charles J. Russo does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. Football and faith could return to the Supreme Court – this time, over loudspeakers – https://theconversation.com/football-and-faith-could-return-to-the-supreme-court-this-time-over-loudspeakers-262104