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Why the price of your favorite chocolate will continue to rise

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theconversation.com – Narcisa Pricope, Professor of Geography and Land Systems Science and Associate Vice President for Research, Mississippi State University – 2025-02-10 07:44:00

Why the price of your favorite chocolate will continue to rise

Chocolate prices spiked amid very dry conditions in Africa.
Chuck Fishman/Getty Images

Narcisa Pricope, Mississippi State University

Valentine’s Day often conjures images of chocolates and romance. But the crop behind this indulgence faces an existential threat.

Regions like northeastern Brazil, one of the world’s notable cocoa-producing areas, are grappling with increasing aridity – a slow, yet unrelenting drying of the land. Cocoa is made from the beans of the cacao tree, which thrives in humid climates. The crop is struggling in these drying regions, and so are the farmers who grow it.

This is not just Brazil’s story. Across West Africa, where 70% of the world’s cacao is grown, and in the Americas and Southeast Asia, shifting moisture levels threaten the delicate balance required for production. These regions, home to vibrant ecosystems and global breadbaskets that feed the world, are on the frontlines of aridity’s slow but relentless advance.

A man in a baseball cap reaches for a large pod on a tree.
A farmer in Colombia holds a cacao pod, which holds the key ingredients for chocolate.
©2017CIAT/NeilPalmer, CC BY-NC-SA

Over the past 30 years, more than three-quarters of the Earth’s landmass has become drier. A recent report I helped coordinate for the United Nations Convention to Combat Desertification found that drylands now cover 41% of global land, an area that expanded by nearly 1.7 million square miles (4.3 million square kilometers) over those three decades — about half the size of Australia.

This creeping dryness is not just a climate phenomenon. It’s a long-term transformation that may be irreversible and that carries devastating consequences for ecosystems, agriculture and livelihoods worldwide.

What causes aridity?

Aridity, while often thought of as purely a climate phenomenon, is the result of a complex interplay among human-driven factors. These include greenhouse gas emissions, land use practices and the degradation of critical natural resources, such as soil and biodiversity.

These interconnected forces have been accelerating the transformation of once-productive landscapes into increasingly arid regions, with consequences that ripple across ecosystems and economies.

Greenhouse gas emissions: A global catalyst

Human-induced climate change is the primary driver of rising aridity.

Greenhouse gas emissions, particularly from fossil fuel combustion and deforestation, increase global temperatures. Rising temperatures, in turn, cause moisture to evaporate at a faster rate. This heightened evaporation reduces soil and plant moisture, exacerbating water scarcity – even in regions with moderate rainfall.

Aridity began accelerating globally in the 1950s, and the world has seen a pronounced shift over the past three decades.

This process is particularly stark in regions already prone to dryness, such as Africa’s Sahel region and the Mediterranean. In these areas, reduced precipitation – combined with increased evaporation – creates a feedback loop: Drier soils absorb less heat, leaving the atmosphere warmer and intensifying arid conditions.

Charts show dryness in recent years and increasing populations in dry areas.
The number of people living in dryland regions has been rising in each region in recent years. Years 1971-2020. Scales vary.
UNCCD

Unsustainable land use practices: A hidden accelerator

Aridity is also affected by how people use and manage land.

Unsustainable agricultural practices, overgrazing and deforestation strip soils of their protective vegetation cover, leaving them vulnerable to erosion. Industrial farming techniques often prioritize short-term yields over long-term sustainability, depleting nutrients and organic matter essential for healthy soils.

For example, in cocoa-producing regions like northeastern Brazil, deforestation to make room for agriculture disrupts local water cycles and exposes soils to degradation. Without vegetation to anchor it, topsoil – critical for plant growth – washes away during rainfall or is blown away by winds, taking with it vital nutrients.

These changes create a vicious cycle: Degraded soils also hold less water and lead to more runoff, reducing the land’s ability to recover.

A woman holds two vegetables in her hands while standing in a dry, sparsely populated field with small houses in the distance.
Aridity can affect the ability to grow many crops. Large parts of the country of Chad, shown here, have drying lands.
United Nations Chad, CC BY-NC-SA

The soil-biodiversity connection

Soil, often overlooked in discussions of climate resilience, plays a critical role in mitigating aridity.

Healthy soils act as reservoirs, storing water and nutrients that plants depend on. They also support biodiversity below and above ground. A single teaspoon of soil contains billions of microorganisms that help cycle nutrients and maintain ecological balance.

However, as soils degrade under aridity and mismanagement, this biodiversity diminishes. Microbial communities, essential for nutrient cycling and plant health, decline. When soils become compacted and lose organic matter, the land’s ability to retain water diminishes, making it even more susceptible to drying out.

In short, the loss of soil health creates cascading effects that undermine ecosystems, agricultural productivity and food security.

Global hot spots: Looming food security crises

Cocoa is just one crop affected by the encroachment of rising aridity.

Other key agricultural zones, including the breadbaskets of the world, are also at risk. In the Mediterranean, Africa’s Sahel and parts of the U.S. West, aridity already undermines farming and biodiversity.

By 2100, up to 5 billion people could live in drylands – nearly double the current population in these areas, due to both population growth and expansion of drylands as the planet warms. This puts immense pressure on food systems. It can also accelerate migration as declining agricultural productivity, water scarcity and worsening living conditions force rural populations to move in search of opportunities.

A map shows large dry areas across the western U.S., Africa, Australia, Asia and parts of South America.
A map shows average aridity for 1981-2010. Computer simulations estimate that greenhouse gas emissions from human activities caused a 1.2% larger increase in the four types of dry regions combined for the periods between 1850 and 1981–2010 than simulations with only solar and volcanic effects considered.
UNCCD

Aridity’s ripple effects also extend far beyond agriculture. Ecosystems, already strained by deforestation and pollution, are stressed as water resources dwindle. Wildlife migrates or dies, and plant species adapted to moister conditions can’t survive. The Sahel’s delicate grasslands, for instance, are rapidly giving way to desert shrubs.

On a global scale, economic losses linked to aridification are staggering. In Africa, rising aridity contributed to a 12% drop in gross domestic product from 1990 to 2015. Sandstorms and dust storms, wildfires and water scarcity further burden governments, exacerbating poverty and health crises in the most affected regions.

The path forward

Aridity is not inevitable, nor are its effects completely irreversible. But coordinated global efforts are essential to curb its progression.

Countries can work together to restore degraded lands by protecting and restoring ecosystems, improving soil health and encouraging sustainable farming methods.

Communities can manage water more efficiently through rainwater harvesting and advanced irrigation systems that optimize water use. Governments can reduce the drivers of climate change by investing in renewable energy.

Continued international collaboration, including working with businesses, can help share technologies to make these actions more effective and available worldwide.

So, as you savor chocolate this Valentine’s Day, remember the fragile ecosystems behind it. The price of cocoa in early 2025 was near its all-time high, due in part to dry conditions in Africa. Without urgent action to address aridity, this scenario may become more common, and cocoa – and the sweet concoctions derived from it – may well become a rare luxury.

Collective action against aridity isn’t just about saving chocolate – it’s about preserving the planet’s capacity to sustain life.The Conversation

Narcisa Pricope, Professor of Geography and Land Systems Science and Associate Vice President for Research, Mississippi State University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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George Washington, a real estate investor and successful entrepreneur, knew the difference between running a business and running the government

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theconversation.com – Eliga Gould, Professor of History, University of New Hampshire – 2025-03-10 07:50:00

President George Washington delivers his first inaugural address in April 1789 in New York City.
Painting by T.H. Matteson, engraving by H.S. Sadd, via Library of Congress

Eliga Gould, University of New Hampshire

During his three presidential campaigns, Donald Trump promised to run the federal government as though it were a business. True to his word, upon retaking office, Trump put tech billionaire Elon Musk at the head of a new group in the executive branch called the Department of Government Efficiency.

DOGE, as Musk’s initiative is known, has so far fired, laid off or received resignations from tens of thousands of federal workers and says it has discovered large sums of wasted or fraudulently spent tax dollars. But even its questionable claim of saving US$65 billion is less than 1% of the $6.75 trillion the U.S. spent in the 2024 fiscal year, and a tiny fraction of the nation’s cumulative debt of $36 trillion. Because Musk’s operation has not been formalized by Congress, DOGE’s indiscriminate cuts also raise troubling constitutional questions and may be illegal.

Before they go too far trying to run the government like a business, Trump and his advisors may want to consider the very different example of the nation’s first chief executive while he was in office.

A man stands while behind him a man sits at a desk.
Elon Musk, left, and Donald Trump have undertaken an effort both describe as seeking to run government more like a business.
Andrew Harnik/Getty Images

The first businessman to become president

Like Trump, George Washington was a businessman with a large real estate portfolio. Along with property in Virginia and six other states, he had extensive claims to Indigenous land in the Ohio River Valley.

Partly because of those far-flung investments, the first president supported big transportation projects, took an active interest in the invention of the steamboat, and founded the Patowmack Company, a precursor to the builders of the Chesapeake and Ohio Canal.

Above all, Washington was a farmer. On his Mount Vernon estate, in northern Virginia, he grew tobacco and wheat and operated a gristmill. After his second term as president, he built a profitable distillery. At the time of his death, he owned nearly 8,000 acres of productive farm and woodland, almost four times his original inheritance.

Much of Washington’s wealth was based on slave labor. In his will, he freed 123 of the 300 enslaved African Americans who had made his successful business possible, but while he lived, he expected his workers to do as he said.

President Washington and Congress

If Washington the businessman and plantation owner was accustomed to being obeyed, he knew that being president was another matter.

In early 1790, near the end of his first year in office, he reflected on the difference in a letter to the English historian Catharine Macaulay. Macaulay had visited Mount Vernon several years before. She was eager to hear the president’s thoughts about what, in his reply, he described as “the last great experiment for promoting human happiness by reasonable compact.”

The new government, Washington wrote, was “a government of accommodation as well as a government of laws.”

As head of the executive branch, his own powers were limited. In the months since the inauguration, he had learned that “much was to be done by prudence, much by conciliation, much by firmness. Few, who are not philosophical Spectators,” he told his friend, “can realise the difficult and delicate part which a man in my situation (has) to act.”

Although Washington did not say why his situation was delicate, he didn’t need to. Congress, as everyone knew, was the most powerful branch of government, not the president.

The previous spring, Congress had shown just how powerful it was when it debated whether the president, who needed Senate confirmation to appoint heads of executive departments, could remove such officers without the same body’s approval. In the so-called Decision of 1789, Congress determined that the president did have that power, but only after Vice President John Adams broke the deadlock in the upper house.

The meaning of Congress’ vote was clear. On matters where the Constitution is ambiguous, Congress would decide what powers the president can legally exercise and what powers he – or, someday, she – cannot.

When it created a “sinking fund” in 1790 to manage the national debt, Congress showed just how far it could constrain presidential power.

Although the fund was part of the Treasury Department, whose secretary served at the president’s pleasure, the commission that oversaw it served for fixed terms set by Congress. The president could neither remove them nor tell them what to do.

Inefficient efficiency

William Humphrey, a member of the Federal Trade Commission, was unconstitutionally fired by Franklin Roosevelt in 1933.
Library of Congress

By limiting Washington’s power over the Sinking Fund Commission, Congress set a precedent that still holds, notably in the 1935 Supreme Court case of Humphrey’s Executor v. U.S.

To the displeasure of those, including Trump, who promote the novel “unitary executive” theory of an all-powerful president, the court ruled that President Franklin D. Roosevelt could not dismiss a member of the Federal Trade Commission before his term was up – even if, as Roosevelt said, his administration’s goals would be “carried out most effectively with personnel of my own selection.”

Like the businessman who currently occupies the White House, Washington did not always like having to share power with Congress. Its members were headstrong and independent-minded. They rarely did what they were told.

But he realized working with Congress was the only way to create a federal government that really was efficient, with each branch carrying out its defined powers, as the founders intended. Because of the Constitution’s checks and balances, the United States was – and is – a government based on compromise between the three branches. No one, not even the president, is exempt.

To his credit, Washington was quick to learn that lesson.The Conversation

Eliga Gould, Professor of History, University of New Hampshire

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5 ways schools have shifted in 5 years since the COVID-19

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theconversation.com – Rachel Besharat Mann, Assistant Professor in Education Studies, Wesleyan University – 2025-03-10 07:48:00

Students sit in pop-up tents during wind ensemble class at Wenatchee High School on Feb. 26, 2021 in Wenatchee, Wash..
David Ryder/Getty Images

Rachel Besharat Mann, Wesleyan University and Gravity Goldberg, Wesleyan University

The U.S. educational landscape has been drastically transformed since the COVID-19 pandemic shuttered school campuses five years ago.

Access to high-quality teachers and curriculum developed by teachers is shrinking, for example. Likewise, there has been a loss of emotional support for students and a decline in the school use of technology and social media.

As education scholars focused on literacy practices in schools, here are five ways we believe the COVID-19 pandemic – and the rapid shift to remote learning and back – has transformed education:

1. Teachers are leaving, and those staying are stressed

At the start of the 2024-2025 school year, 82% of U.S. public schools had teaching vacancies.

Schools have tried to adapt by expanding class sizes and hiring substitute teachers. They have also increased use of video conferencing to Zoom teachers into classrooms.

A teacher sits at home in front of a computer monitor.
A teacher works from her home due to the COVID-19 outbreak on April 1, 2020, in Arlington, Va.
Olivier Doulier/AFP via Getty Images

Teacher retention has been a problem for at least a decade. But after the pandemic, there was an increase in the number of teachers who considered leaving the profession earlier than expected.

When teachers leave, often in the middle of the school year, it can require their colleagues to step in and cover extra classes. This means teachers who stay are overworked and possibly not teaching in their area of certification.

This, in turn, leads to burnout. It also increases the likelihood that students will not have highly qualified teachers in some hard-to-fill positions like physical science and English.

2. Increase in scripted curriculum

As of fall 2024, 40 states and Washington had passed science of reading laws, which mandate evidence-based reading instruction rooted in phonics and other foundational skills.

While the laws don’t necessarily lead to scripted curriculum, most states have chosen to mandate reading programs that require teachers to adhere to strict pacing. They also instruct teachers not to deviate from the teachers’ manual.

Many of these reading programs came under scrutiny by curricular evaluators from New York University in 2022. They found the most common elementary reading programs were culturally destructive or culturally insufficient – meaning they reinforce stereotypes and portray people of color in inferior and destructive ways that reinforce stereotypes.

This leaves teachers to try to navigate the mandated curriculum alongside the needs of their students, many of whom are culturally and linguistically diverse. They either have to ignore the mandated script or ignore their students. Neither method allows teachers to be effective.

When teachers are positioned as implementers of curriculum instead of professionals who can be trusted to make decisions, it can lead to student disengagement and a lack of student responsiveness.

This form of de-professionalization is a leading cause of teacher shortages. Teachers are most effective, research shows, when they feel a sense of agency, something that is undermined by scripted teaching.

3. Improvements in teen mental health, but there’s more to do

Many of the narratives surrounding adolescent mental health, particularly since the pandemic, paint a doomscape of mindless social media use and isolation.

However, data published in 2024 shows improvements in teen reports of persistent sadness and hopelessness. Though the trend is promising in terms of mental health, in-school incidences of violence and bullying rose in 2021-22, and many teens report feeling unsafe at school.

Other reports have shown an increase in feelings of loneliness and isolation among teens since the pandemic.

4. Crackdown on students’ technology use in schools

COVID-19 prompted schools to make an abrupt switch to educational technology, and many schools have kept many of these policies in place.

For example, Google Classroom and other learning management systems are commonly used in many schools, particularly in middle school and high school.

These platforms can help parents engage with their children’s coursework. That facilitates conversations and parental awareness.

But this reliance on screens has also come under fire for privacy issues – the sharing of personal information and sensitive photos – and increasing screen time.

And with academia’s use of technology on the rise, cellphone usage has also increased among U.S. teens, garnering support for school cellphone bans.

A child wearing a face mask looks at a laptop computer.
A student attends an online class at the Crenshaw Family YMCA on Feb. 17, 2021, in Los Angeles during the COVID-19 pandemic.
Patrick T. Fallon/AFP via Getty Images

But banning these devices in schools may not help teens, as smartphone use is nearly universal in the U.S. Teens need support from educators to support them as they learn to navigate the complex digital world safely, efficiently and with balance.

In light of data surrounding adolescent mental health and online isolation – and the potential for connection through digital spaces – it’s also important that teens are aware of positive support networks that are available online.

Though these spaces can provide social supports, it is important for teens to understand the strengths and limitations of technology and receive authentic guidance from adults that a technology ban may prohibit.

5. Students and adults need social emotional support

Students returned to in-person schooling with a mix of skill levels and with a variety of social and emotional needs.

Social and emotional learning includes self-awareness, self-management, social awareness, relational skills and decision-making.

These skills are vital for academic success and social relationships.

Teachers reported higher student needs for social and emotional learning after they returned to in-person instruction.

While some of this social and emotional teaching came under fire from lawmakers and parents, this was due to confusion about what it actually entailed. These skills do not constitute a set of values or beliefs that parents may not agree with. Rather, they allow students to self-regulate and navigate social situations by explicitly teaching students about feelings and behaviors.

A teacher and student are separated by plexiglass as they sit across from each other at a desk.
A teacher provides instruction to a student at Freedom Preparatory Academy on Feb. 10, 2021, in Provo, Utah.
George Frey/Getty Images

One area where students may need support is with cognitive flexibility, or the ability to adapt to current situations and keep an open mind. Classroom instruction that engages students in varied tasks and authentic teaching strategies rooted in real-life scenarios can strengthen this ability in students.

Besides allowing students to be engaged members of a school community, cognitive flexibility is important because it supports the skill development that is part of many state English language arts and social studies standards.

Social and emotional learning and cognitive flexibility are key components that allow students to learn.

Due to vague or confusing state policies, many schools have stopped teaching social and emotional learning skills, or minimized their use.

This, coupled with teacher stress and burnout, means that both adults and children in schools are often not getting their social and emotional needs met.

Message of mistrust

While we described five shifts since the start of the pandemic, the overall trend in K-12 schools is one of mistrust.

We feel that the message – from districts, state legislators and parents – is that teachers cannot be trusted to make choices.

This represents a massive shift. During the initial phase of the COVID-19 lockdown, teachers were revered and thanked for their service.

We believe in teacher autonomy and professionalism, and we hope this list can help Americans reflect on the direction of the past five years. If society wants a different outcome in the next five years, it starts with trust.The Conversation

Rachel Besharat Mann, Assistant Professor in Education Studies, Wesleyan University and Gravity Goldberg, Visiting Assistant Professor in Education Studies, Wesleyan University

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Daylight saving time and early school start times cost billions in lost productivity and health care expenses

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theconversation.com – Joanna Fong-Isariyawongse, Associate Professor of Neurology, University of Pittsburgh – 2025-03-07 13:55:00

Daylight saving time kicks in on March 9, 2025, but some say it leads to more heart attacks, depression and car accidents.
Lord Henri Voton/E+ via Getty Images

Joanna Fong-Isariyawongse, University of Pittsburgh

Investigations into the 1986 Space Shuttle Challenger disaster revealed that key decision-makers worked on little sleep, raising concerns that fatigue impaired their judgment. Similarly, in 1989, the Exxon Valdez oil spill resulted in a massive environmental catastrophe. The official investigation revealed the third mate, in charge of steering the ship, was running on too little sleep, among other problems.

While these specific disasters were not caused by daylight saving time, they are conclusively linked to fatigue, based on postaccident investigations and reports. They underscore the well-documented dangers of sleep deprivation and fatigue-related errors. Yet a vast body of research shows that every year, the shift to daylight saving time needlessly exacerbates these risks, disrupting millions of Americans’ sleep and increasing the likelihood of accidents, health issues and fatal errors.

Imagine a world where one simple decision – keeping our clocks aligned with the natural cycle of the Sun – could save lives, prevent accidents and improve mental well-being. It’s not just about an hour of lost sleep; it’s about how small disruptions ripple through our health, our workplaces and even our children’s futures.

I’m a neurologist who specializes in sleep health. I’ve seen firsthand the negative impacts of poor sleep; it has enormous personal and economic consequences.

Yet despite overwhelming research supporting better sleep policies – such as delaying school start times to align with adolescent biology and the adoption of permanent standard time – these issues remain largely overlooked in public policy discussions.

Sleep deprivation comes with real costs

Chronic sleep deprivation does more than leave people tired. It costs an estimated US$411 billion annually in lost productivity and health care costs. Poor sleep leads to workplace mistakes, car accidents and long-term health issues that strain businesses, families and the economy as a whole.

Fortunately, there’s a fix. Smarter sleep policies – such as permanent standard time and later school start times – can boost efficiency, improve health and save lives.

In a classroom setting, students take an exam.
Sleep-deprived teens have lower test scores and graduation rates.
skynesher/E+

Up before dawn

Teenagers are the most sleep-deprived age group in the U.S. Multiple studies and surveys show that anywhere from 71% to 84% of high school students report getting insufficient sleep.

This is largely due to early school start times, which force teens to wake up before their biological clocks are ready. If you have a teenager, you probably see it every day: The teen struggling to wake up before sunrise, rushing out the door without breakfast, then waiting in the dark for the school bus.

More than 80% of public middle and high schools in the U.S. start before 8:30 a.m., with 42% starting before 8 a.m. and 10% before 7:30 a.m. As a result, some districts have bus pickups as early as 5 a.m.

Teenagers are going through a natural shift in their circadian rhythms by about two hours. This shift, driven by hormones and biology, makes it hard for them to fall asleep before around 11 p.m. The bodies of teens aren’t wired for these schedules, yet schools and society have designed a system that forces them to function at their worst.

Declining scores, drowsy driving and depression

Sleep-deprived teens have lower grades and test scores, more car crashes caused by drowsy driving, more alcohol and drug use and higher rates of depression, anxiety suicide and aggressive behavior, including carrying weapons.

Along with the health benefits, studies have found that moving school start times to 8:30 am or later could add $8.6 billion to the economy within two years, partly by increased graduation rates.

While concerns about increased transportation costs exist, such as the need for additional buses or drivers due to staggered school start times, some districts have found that optimizing bus routes can offset expenses, making the change cost-neutral or even cost-saving. For instance, a study in Boston found that reorganizing bus schedules using advanced algorithms reduced the number of buses needed and improved efficiency, which allowed high school students to start later and better align with their natural sleep cycles. This change not only supported adolescent sleep health but also saved the district $5 million annually.

YouTube video
Studies show that daylight saving time does not reduce energy use.

More heart attacks, car wrecks and suicide

Every March, most Americans shift their clocks forward for daylight saving time. Studies show this change disrupts sleep and leads to measurable adverse outcomes, including a significant increase in heart attacks. These effects linger for days after the shift, as sleep-deprived workers struggle to adjust.

The mental health impact is also severe. Suicide rates increase in the weeks following the switch, particularly for those already vulnerable to depression.

Unlike daylight saving time, standard time follows the body’s natural circadian rhythm, which is primarily regulated by exposure to sunlight. Our internal clocks are most stable when morning light exposure occurs early in the day, signaling the body to wake up and regulate key biological functions such as hormone production, alertness and metabolism. In contrast, daylight saving time artificially extends evening light, delaying the body’s release of melatonin and making it harder to fall asleep at a biologically appropriate time.

Studies have found that adopting permanent standard time could prevent up to 5,000 suicides annually by reducing seasonal depression, decrease errors, injuries and absenteeism in the workplace and make roads safer, potentially preventing 1,300 traffic deaths each year.

Times are changing

The U.S. tried permanent daylight saving time in 1974. It was so unpopular that Congress repealed it within nine months.

Russia tried it too, in 2011, but switched back three years later. The United Kingdom dropped permanent daylight saving time in 1971 after three years, and Portugal in 1996 after four. All of these countries found that the switch caused widespread public dissatisfaction, health concerns, more morning car accidents and disrupted work schedules. No country is currently on year-round daylight saving time.

These examples provide real-world evidence that permanent DST is undesirable due to public dissatisfaction, safety concerns and negative health effects – all three countries attempted it and ultimately reversed course. Since 2022, there has been renewed debate, largely driven by former U.S. Sen. Marco Rubio’s Sunshine Protection Act, which aims to make DST permanent.

However, the name is misleading because it doesn’t “protect” sunshine but rather eliminates critical morning light, which is essential for regulating circadian rhythms. Major health organizations, along with the National Safety Council, strongly oppose permanent DST due to its well-documented risks.

There are signs that suggest the U.S. is finally waking up to these problems. Out of 13,000 school districts, 1,000 have independently adopted later school start times. California and Florida have enacted laws requiring high schools to start no earlier than 8:30 a.m. California’s mandate went into effect in 2022, and Florida’s is set to begin in 2026.

Permanent standard time and later school start times are not radical ideas. They’re practical, evidence-based solutions based on human biology. Implementing these changes nationally would require congressional action. However, current federal law already allows states to adopt permanent standard time, as Arizona and Hawaii have done, setting a precedent for the rest of the country.The Conversation

Joanna Fong-Isariyawongse, Associate Professor of Neurology, University of Pittsburgh

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