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65 years of NASA – an astrophysicist reflects on the agency’s legacy

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65 years of NASA – an astrophysicist reflects on the agency’s legacy

NASA’s missions have inspired generations of young people to pursue the sciences.
Patrick Semansky/AP

Stephen G. Alexander, Miami University

Sixty-five years ago, in 1958, several government programs that had been pursuing spaceflight combined to form NASA. At the time, I was only 3 years old.

I’ve now been a professor of physics and astronomy for nearly 30 years, and I realize that, like countless others who came of age in the 1960s and ‘70s, NASA’s missions have had a profound effect on my life and career path. From John Glenn’s first flight into orbit to the Hubble telescope, the agency’s legacy has inspired generations of scientists.

First flight into orbit

The date was Feb. 20, 1962. My first grade teacher, Ms. Ochs, told the class that we would be doing something different on that day. She went to the blackboard and wrote in large block letters “John Glenn” and “NASA.”

She asked if any of us knew what those words meant. None of us did, so she grabbed a globe, and using a pen with a plastic cap, she demonstrated that John Glenn, an astronaut, would soon be launched on a rocket – the pen – from Florida. When the rocket got high enough, Glenn in the Mercury capsule – the cap – would separate from the rocket and go into orbit around the Earth. She demonstrated this by moving the pen cap around the globe.

My class then sat and listened to the historic launch of Friendship 7 carrying Glenn, which was the first U.S. mission to send a man into orbit around the Earth.

A small, funnel-shaped spacecraft in orbit above Earth
During the Gemini mission, two spacecrafts attempted the first-ever space rendezvous. This image, taken in the Gemini 6 craft, shows the Gemini 7 craft just 43 feet away.
NASA

There would be three more missions in the one-manned Mercury program, culminating in Gordon Cooper’s Faith 7 mission, which completed 22 Earth orbits. The program proved that NASA could put a manned spacecraft in orbit and bring it back safely to Earth. Next, NASA was ready to move on to a more maneuverable two-person spacecraft.

A two-person spacecraft

In 1965, NASA planned to launch the two-person Gemini spacecraft, and I moved on to the fifth grade where my teacher, Mrs. Wein, was also a space enthusiast. In December, NASA launched the joint missions of Gemini 6 and 7, and Mrs. Wein gave me permission to stay home from school to watch the TV coverage.

This was the first time that two piloted spacecraft performed what is called a rendezvous maneuver, where they meet up in orbit. Orbital maneuvers like this require very precise calculations and a spacecraft in which astronauts can make path changes in orbit – which is what the Gemini capsule was designed to do.

A diagram showing the Earth and the Moon as circles, with a space craft's path from Earth, to the moon, and back to Earth.
A lunar orbit rendezvous occurs when a smaller lunar lander breaks off a main spacecraft while in orbit to land on or circle the Moon before returning to the main craft.
NASA, CC BY-ND

The Gemini 6A and 7 spacecrafts practiced a rendezvous maneuver in Earth’s orbit. At the time, I didn’t understand the importance of this mission, until Mrs. Wein directed me to the “S” volume of the World Book Encyclopedia. There, under “Spaceflight,” was a full-page diagram of the lunar orbit rendezvous plan that a NASA engineer, John Houbolt, had developed to get the astronauts to the Moon and back.

The central feature of the lunar orbit rendezvous was that two spacecraft, the Apollo Command Module and the Lunar Excursion Module, would rendezvous in orbit around the Moon using the same technique the Gemini 6 and 7 missions had demonstrated. The technology of this maneuver, used in Apollo missions, would later help land Neil Armstrong on the Moon.

On to the Moon

The Earth, partially covered by darkness, as visible from the moon
‘Earthrise,’ captured by the Apollo 8 mission, was the first look at Earth from afar.
NASA

In December 1968, when I was in eighth grade, I watched the Apollo 8 mission orbit the Earth on TV. It was the first time that anyone, whether U.S. astronaut or Soviet cosmonaut, had left low Earth orbit. This mission gave us “Earthrise”, the first look at our home planet as seen from afar.

The Apollo 11 Moon landing happened in July 1969. I will never forget sitting in my living room as Armstrong stepped off the Lunar Excursion Module onto the lunar surface. With Armstrong’s steps, the aspirations of a lost president, thousands of NASA scientists and engineers and millions of public followers were fulfilled.

YouTube video
CBS News anchor Walter Cronkite captured the wonder of the moment when he slowly removed his glasses, rubbed his hands together and exclaimed, ‘boy.’

In December 1972, when I was a senior in high school, Gene Cernan became the last person to walk on the Moon during the Apollo 17 mission. Like many of us who witnessed the Apollo missions, I listened to Cernan’s final words from the Moon, where he challenged young people to continue what NASA had begun.

Inspired by Cernan’s words, I went on to earn degrees in aerospace engineering and worked on both the reentry of the Skylab Space Station and the early mission planning for the Magellan spacecraft that visited Venus.

At this point, I made a career change – I returned to school to study physics and ultimately ended up in theoretical astrophysics.

After Apollo

NASA has had a profound influence in the sciences. For one, the ability to guide unmanned robotic spacecraft anywhere in the solar system was a byproduct of the technologies necessary for the manned Apollo missions. Using this technology, NASA has sent probes to all of the planets – and some non-planets – in the solar system, revolutionizing scientists’ knowledge of our cosmic backyard.

Perhaps the most ambitious of these is the Mars Perseverance Rover, which looks for chemical evidence of past or present life on Mars. It also collects and leaves samples for a potential return mission sometime in the 2030s.

In terms of pure astronomy, NASA’s space-based observatories span the electromagnetic spectrum. The Hubble Space Telescope and its newly launched cousin, the James Webb Space Telescope, have allowed astronomers to get large telescopes above Earth’s optically hazy atmosphere. With these instruments, we can see almost to the beginning of time, since looking deeper into space also means looking back in time.

The James Webb Space Telescope is revolutionizing our view of the cosmos – there has not been an equal revolution in observational astronomy since Galileo first pointed a telescope at the heavens in 1609.

Two images showing a suite of galaxies with small boxes around faint red smudges.
Images from the James Webb Space Telescope showing early galaxies.
NASA, ESA, CSA, Tommaso Treu (UCLA), CC BY-SA

Looking ahead

What will the future hold for NASA? It’s hard to say.

Recently, private enterprise has driven advances in both launch vehicles and satellite design, although NASA will likely continue to have a leading role, not only in the spaceflight but the scientific research as well.

I hope that today there are elementary teachers like Ms. Ochs and Mrs. Wein who will nurture the wonder and excitement of spaceflight in their students. But they won’t have to just listen on the radio. They can watch livestreams, like those of launches of SpaceX’s Falcon Heavy in 2018 and NASA’s Artemis I in November 2022.

NASA’s first 65 years have been an amazing record of accomplishments. When the students I teach today near my age, I wonder what amazing things – about which we can only dream – they will look back on.The Conversation

Stephen G. Alexander, Associate Professor of Physics, Miami University

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

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Why people rebuild in Appalachia’s flood-ravaged areas despite the risks

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theconversation.com – Kristina P. Brant, Assistant Professor of Rural Sociology, Penn State – 2025-02-26 07:38:00

Why people rebuild in Appalachia’s flood-ravaged areas despite the risks

Parts of the North Fork of the Kentucky River flooded in July 2022, and again in February 2025.
Arden S. Barnes/For The Washington Post via Getty Images

Kristina P. Brant, Penn State

On Valentine’s Day 2025, heavy rains started to fall in parts of rural Appalachia. Over the course of a few days, residents in eastern Kentucky watched as river levels rose and surpassed flood levels. Emergency teams conducted over 1,000 water rescues. Hundreds, if not thousands of people were displaced from homes, and entire business districts filled with mud.

For some, it was the third time in just four years that their homes had flooded, and the process of disposing of destroyed furniture, cleaning out the muck and starting anew is beginning again.

Historic floods wiped out businesses and homes in eastern Kentucky in February 2021, July 2022 and now February 2025. An even greater scale of destruction hit eastern Tennessee and western North Carolina in September 2024, when Hurricane Helene’s rainfall and flooding decimated towns and washed out parts of major highways.

YouTube video
Scenes of flooding from several locations across Appalachia in February 2025.

Each of these events was considered to be a “thousand-year flood,” with a 1-in-1,000 chance of happening in a given year. Yet they’re happening more often.

The floods have highlighted the resilience of local people to work together for collective survival in rural Appalachia. But they have also exposed the deep vulnerability of communities, many of which are located along creeks at the base of hills and mountains with poor emergency warning systems. As short-term cleanup leads to long-term recovery efforts, residents can face daunting barriers that leave many facing the same flood risks over and over again.

Exposing a housing crisis

For the past nine years, I have been conducting research on rural health and poverty in Appalachia. It’s a complex region often painted in broad brushstrokes that miss the geographic, socioeconomic and ideological diversity it holds.

Appalachia is home to a vibrant culture, a fierce sense of pride and a strong sense of love. But it is also marked by the omnipresent backdrop of a declining coal industry.

There is considerable local inequality that is often overlooked in a region portrayed as one-dimensional. Poverty levels are indeed high. In Perry County, Kentucky, where one of eastern Kentucky’s larger cities, Hazard, is located, nearly 30% of the population lives under the federal poverty line. But the average income of the top 1% of workers in Perry County is nearly US$470,000 – 17 times more than the average income of the remaining 99%.

This income and wealth inequality translates to unequal land ownership – much of eastern Kentucky’s most desirable land remains in the hands of corporations and families with great generational wealth.

When I first moved to eastern Kentucky in 2016, I was struck by the grave lack of affordable, quality housing. I met families paying $200-$300 a month for a small plot to put a mobile home. Others lived in “found housing” – often-distressed properties owned by family members. They had no lease, no equity and no insurance. They had a place to lay one’s head but lacked long-term stability in the event of disagreement or disaster. This reality was rarely acknowledged by local and state governments.

Eastern Kentucky’s 2021 and 2022 floods turned this into a full-blown housing crisis, with 9,000 homes damaged or destroyed in the 2022 flood alone.

“There was no empty housing or empty places for housing,” one resident involved in local flood recovery efforts told me. “It just was complete disaster because people just didn’t have a place to go.”

Most homeowners did not have flood insurance to assist with rebuilding costs. While many applied to the Federal Emergency Management Agency for assistance, the amounts they received often did not go far. The maximum aid for temporary housing assistance and repairs is $42,500, plus up to an additional $42,500 for other needs related to the disaster.

The federal government often provides more aid for rebuilding through block grants directed to local and state governments, but that money requires congressional approval and can take months to years to arrive. Local community coalitions and organizations stepped in to fill these gaps, but they did not necessarily have sufficient donations or resources to help such large numbers of displaced people.

A man walks from a store with lighted rooms above it. In the background, homes are flooded.
Affordable rental housing is hard to find in much of Appalachia. When flooding wipes out homes, as Jackson, Ky., saw in July 2022 and again in February 2025, it becomes even more rare.
Michael Swensen/Getty Images

With a dearth of affordable rentals pre-flood, renters who lost their homes had no place to go. And those living in “found housing” that was destroyed were not eligible for federal support for rebuilding.

The sheer level of devastation also posed challenges. One health care professional told me: “In Appalachia, the way it usually works is if you lose your house or something happens, then you go stay with your brother or your mom or your cousin. … But everybody’s mom and brother and cousin also lost their house. There was nowhere to stay.” From her point of view, “our homelessness just skyrocketed.”

The cost of land – social and economic

After the 2022 flood, the Kentucky Department for Local Government earmarked almost $300 million of federal funding to build new, flood-resilient homes in eastern Kentucky. Yet the question of where to build remained. As another resident involved in local flood recovery efforts told me, “You can give us all the money you want; we don’t have any place to build the house.”

It has always been costly and time-intensive to develop land in Appalachia. Available higher ground tends to be located on former strip mines, and these reclaimed lands require careful geotechnical surveying and sometimes structural reinforcements.

If these areas are remote, the costs of running electric, water and other infrastructure services can also be prohibitive. For this reason, for-profit developers have largely avoided many counties in the region. The head of a nonprofit agency explained to me that, because of this, “The markets have broken. … We have no [housing] market.”

In an aerial view of Kentucky's mountains, now-flat areas where mountain top were mined for their coal are visible.
Eastern Kentucky’s mountains are beautiful, but there are few locations for building homes that aren’t near creeks or rivers. Strip-mined land, where mountaintops were flattened, often aren’t easily accessible and come with their own challenges.
Posnov/Moment via Getty Images

There is also some risk involved in attempting to build homes on new land that has not previously been developed. A local government could pay for undeveloped land to be surveyed and prepared for development, with the prospect of reimbursement by the U.S. Department of Housing and Urban Development if housing is successfully built. But if, after the work to prepare the land, it is still too cost-prohibitive to build a profitable house there, the local government would not receive any reimbursement.

Some counties have found success clearing land for large developments on former strip mine sites. But these former coal mining areas can be considerable distances from towns. Without robust public transportation systems, these distances are especially prohibitive for residents who lack reliable personal transportation.

Another barrier is the high prices that both individual and corporate landowners are asking for properties on higher ground.

The scarcity of desirable land available for sale, combined with increasingly urgent demand, has led to prices unaffordable for most. Another resident involved in local flood recovery efforts explained: “If you paid $5,000 for 30 acres 40 years ago, why won’t you sell that for $100,000? Nope, [they want] $1 million.” That makes it increasingly difficult for both individuals and housing developers to purchase land and build.

One reason for this scarcity is the amount of land that is still owned by outside corporate interests. For example, Kentucky River Properties, formerly Kentucky River Coal Corporation, owns over 270,000 acres across seven counties in the region. While this landholding company leases land to coal, timber and gas companies, it and others like it rarely permit residential development.

But not all unused land is owned by corporations. Some of this land is owned by families with deep roots in the region. People’s attachment to a place often makes them want to stay in their communities, even after disasters. But it can also limit the amount of land available for rebuilding. People are often hesitant to sell land that holds deep significance for their families, even if they are not living there themselves.

Two men dump buckets of ruined wallboard removed from a home. The yard they are walking through is filled with mud.
Rural communities are often tight-knit. Many residents want to stay despite the risks.
AP Photo/Timothy D. Easley

One health care professional expressed feeling torn between selling or keeping their own family property after the 2022 flood: “We have a significant amount of property on top of a mountain. I wouldn’t want to sell it because my papa came from nothing. … His generation thought owning land was the greatest thing. … And for him to provide his children and his grandchildren and their great-grandchildren a plot of land that he worked and sweat and ultimately died to give us – people want to hold onto that.”

She recognized that land was in great demand but couldn’t bring herself to sell what she owned. In cases like hers, higher grounds are owned locally but still remain unused.

Moving toward higher ground, slowly

Two years after the 2022 flood, major government funding for rebuilding still has not resulted in a significant number of homes. The state has planned seven communities on higher ground in eastern Kentucky that aim to house 665 new homes. As of early 2025, 14 houses had been completed.

Progress on providing housing on higher ground is slow, and the need is great.

In the meantime, when I conducted interviews during the summer and fall of 2024, many of the mobile home communities that were decimated in the 2022 flood had begun to fill back up. These were flood-risk areas, but there was simply no other place to go.

Last week, I watched on Facebook a friend’s live video footage showing the waters creeping up the sides of the mobile homes in one of those very communities that had flooded in 2022. Another of my friends mused: “I don’t know who constructed all this, but they did an unjustly favor by not thinking how close these towns was to the river. Can’t anyone in Frankfort help us, or has it gone too far?”

With hundreds more people now displaced by the most recent flood, the need for homes on higher grounds has only expanded, and the wait continues.The Conversation

Kristina P. Brant, Assistant Professor of Rural Sociology, Penn State

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

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How Nutriset, a French company, has helped alleviate hunger and create jobs in some of the world’s poorest places

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theconversation.com – Nicolas Dahan, Professor of Management, Seton Hall University – 2025-02-25 12:50:00

How Nutriset, a French company, has helped alleviate hunger and create jobs in some of the world’s poorest places

Michel Lescanne, founder and president of the French company Nutriset, holds Plumpy’nut packets in 2005.
Robert Francois/AFP via Getty Images

Nicolas Dahan, Seton Hall University and Bernard Leca, ESSEC

About 19 million children under 5 around the world suffer from severe acute malnutrition every year. This life-threatening condition kills 400,000 of them – that’s one child every 10 seconds.

These numbers are staggering, especially because a lifesaving treatment has existed for nearly three decades: “ready-to-use therapeutic food.”

Nutriset, a French company, was founded by Michel Lescanne. He was one of two scientists who invented this product in 1996. A sticky peanut butter paste branded Plumpy’nut, it’s enriched with vitamins and minerals and comes in packets that require no refrigeration or preparation.

Health care professionals were quickly convinced of its promise. What was harder to figure out was how to manufacture as many packets as possible while cutting costs. In 2008, ready-to-use therapeutic food producers like Nutriset charged US$60 for one box of 150 packets – the number needed to treat one severely malnourished child for the 6-8 weeks needed for their recovery.

In a study we published in the Journal of Management Studies in October 2024, we explained how the international agencies, nongovernmental organizations, activists and for-profit companies involved in the product’s distribution managed to resolve a public controversy over the use of Nutriset’s patent and its for-profit business model.

Contrary to the expectations of activists and many humanitarian NGOs, this for-profit company managed to reduce its prices down to $39 per box of Plumpy’nut packets by 2019 and keep them consistently lower than any nonprofit or for-profit competitors could, all the while enforcing its patent rights.

We interviewed Jan Komrska, a pharmacist then serving as the ready-to-use therapeutic food procurement manager at UNICEF, the United Nations agency for children; Tiddo von Schoen-Angerer, a pediatrician who was leading the access to medicines campaign at Doctors Without Borders, a medical charity; and Thomas Couaillet, a Nutriset executive. We also studied documents issued over the course of a decade to find out why this company’s unusual approach to intellectual property protection was so successful.

Helping franchisees in low-income countries get started

Nutriset and humanitarian organizations disagreed at the start over how to proceed with the production of ready-to-use therapeutic food.

Doctors Without Borders at first accused Nutriset of behaving like a big drugmaker, shielding itself from competition by aggressively enforcing its patents to charge excessively high prices. The nongovernmental organization demanded that Nutriset allow any manufacturer to make its patented packets, without any compensation for that intellectual property.

By 2012, Nutriset had changed course. It had stopped being almost the sole producer of ready-to-use therapeutic food and instead allowed licensees and franchisee partners, chiefly located in low-income countries, to make the packets without having to pay any royalties. It did, however, make an exception for the United States. It allowed Edesia, a Rhode Island-based nonprofit, to become a Nutriset franchisee.

It also provided these smaller producers with seed funding and technical advice.

Nutriset is still the world’s largest ready-to-use therapeutic food producer, we have determined through our research. It’s responsible for about 30% to 40% of the world’s annual production, down from more than 90% in 2008.

There are some other U.S. manufacturers, such as Tabatchnick Fine Foods, but they aren’t Nutriset partners.

YouTube video
Nutriset produced this video in 2012 to explain the scale of hunger around the world and how its ready-to-use therapeutic food packets can help.

Threatening legal action

At the same time, the company continued to threaten to take legal action against potential rivals located in developed countries that were replicating their recipe without authorization. Usually, cease-and-desist letters were sufficient.

Nutriset implemented this strategy to ward off competition from big multinational corporations that might try to establish their brands in new markets, gaining a foothold before flooding them with imported ultraprocessed food. A big risk, had that occurred, would have been less breastfeeding for newborns and the disruption of local diets.

Nutriset’s strategy of opening access to its patent selectively has enabled UNICEF to double the share of packets it buys from producers located in the Global South.

UNICEF, the world’s biggest buyer of ready-to-use therapeutic food, bought less than one-third of its supplies from those nations in 2011. That share climbed to two-thirds in 2022.

Nutriset’s reliance on local franchisees has helped create over 1,000 jobs in hunger-stricken regions while strengthening the supply chain and reducing the carbon emissions of transportation, according to UNICEF.

Nutriset’s creative patent strategy also helped its partner producers in low-income countries, which include nonprofit and for-profit ventures, compete with large corporations in developed countries by the time its patent expired in 2018.

In this instance, a for-profit company not only managed to keep its prices lower than its competitors, including nonprofits, but used its patent to support economic development in developing countries by shielding startup producers from international competition.

As a result of these successes, we found that nongovernmental organizations eventually stopped criticizing the French company and recognized that high prices were actually not due to Nutriset’s patent policy but rather to global prices of the packets’ ingredients.

In recognition of its contributions and innovation, Nutriset won the U.S. Patent and Trademark Office’s Patents for Humanity Award in 2015.

Offering a cheap, convenient and effective treatment

One of the biggest advantages of ready-to-use therapeutic food is that parents or other caregivers can give it to their kids at home or on the go. That’s more convenient and cheaper than the alternative: several months of hospitalization where children receive a nutrient-dense liquid called “therapeutic milk.”

The at-home treatment works most of the time. More than 80% of the children who get three daily food packets recover within two months.

Severe acute malnutrition deaths remain high because historically only 25% to 50% of children suffering from it get treated with ready-to-use therapeutic food, due to insufficient funding. The treatment programs are run by governments, UNICEF and other international agencies, and NGOs such as Doctors Without Borders.

USAID’s funding role

The U.S. government spent about $200 million in 2024 through the U.S. Agency for International Development on ready-to-use therapeutic food, enough packets to treat 3.9 million children. That’s nearly as much as UNICEF, which treats about 5 million children annually.

It’s unclear whether the Trump administration, which is trying to dismantle USAID, will discontinue its funding of ready-to-use therapeutic food that the U.S. government has purchased exclusively from U.S. manufacturers with U.S.-sourced ingredients.

At a time when the flow of development aid from several wealthy countries is declining, the precedent Nutriset set suggests that humanitarian organizations, by teaming up with international agencies, governments and for-profit companies, can help drive down the costs of saving lives threatened by hunger while increasing the nutritional autonomy of the Global South.

But the funding for ready-to-use therapeutic food and its distribution has to come from somewhere, whether it is from governments, foundations or other donors.The Conversation

Nicolas Dahan, Professor of Management, Seton Hall University and Bernard Leca, Professeur en sciences de gestion, ESSEC

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

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A hazy legal landscape means people can get high on hemp products, even where pot is prohibited

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theconversation.com – Katharine Neill Harris, Fellow in Drug Policy, Rice University – 2025-02-25 07:38:00

A hazy legal landscape means people can get high on hemp products, even where pot is prohibited

Delta-8 supplements on a shelf at a Texas store.
Sergio Flores/Washington Post via Getty Images

Katharine Neill Harris, Rice University

In Texas, where I live, marijuana has long been illegal. Yet on a busy street in my Houston neighborhood, at least five stores within a half-mile of each other sell cannabis products that promise a strong high.

Texas isn’t alone. Due to a mix of recent legal changes and an uncertain policy landscape, residents in roughly half of American states have easy access to impairing hemp products that bear a strong resemblance to marijuana and are far less regulated.

As hemp sales soar – reaching nearly US$3 billion in 2023 – a number of states are tightening their restrictions, while experts are analyzing the public health implications. That’s why I analyzed hemp policies in all 50 states with some of my colleagues at Rice University’s Baker Institute, where I’m a drug policy fellow.

Marijuana and hemp: Same plant, different policies

Marijuana and hemp are both varieties of cannabis sativa, a plant with many uses that produces thousands of compounds. Among them is the popular intoxicant delta-9 tetrahydrocannabinol, or delta-9 THC.

Hemp is widely valued as an industrial crop, and for most of American history, farmers freely cultivated it. But by the mid-20th century, lawmakers had grown increasingly opposed to marijuana and were concerned by hemp’s similarity to its impairment-causing cousin.

In an effort to permit hemp cultivation while prohibiting production of a psychoactive plant, the Agricultural Marketing Act of 1946 defined hemp as all parts of the cannabis plant with less than 0.3 percent concentration of delta-9 THC by dry weight. Cannabis that exceeded this threshold was considered marijuana.

The 1970 Controlled Substances Act ushered in the modern era of prohibition of marijuana and other drugs. Hemp remained technically legal, but because of its similarity to marijuana, it was listed as a Schedule I drug, alongside heroin and other substances deemed to have a high potential for abuse and no medical value.

Because of hemp’s Schedule I status, the Drug Enforcement Administration tightly regulated its production. But hemp farmers have long argued that these regulations were excessive – and in 2018, Congress agreed. That year, lawmakers passed a farm bill that removed hemp from the Controlled Substances Act and legalized the manufacture and sale of hemp and its derivatives.

YouTube video
The ABC News affiliate in San Diego reports on the 2018 farm bill from a local perspective.

Crucially, the 2018 bill still defines hemp as all parts of the plant and its derivatives that have less than 0.3 percent delta-9 THC. But it left a loophole: While delta-9 is the most well-known form of THC, it’s not the only one. Other forms of THC, known as THC isomers, have similar effects. These isomers, like delta-8 and delta-10 THC, can be derived from the hemp plant, and like delta-9 THC, they can cause impairment. The 2018 Farm Bill legalized all of them.

In 2023, sales of hemp-derived cannabinoids reached US$2.8 billion. Market growth has been accompanied by a rise in adverse health events. Chemists have expressed alarm at how some hemp products are made, and analyses of commercially available products have found them to contain heavy metals, residual solvents and pesticides.

Given the lax regulatory environment, many public officials now question the lack of guardrails on this burgeoning hemp industry. As a result, officials and governments across the country are now enacting or considering policy changes.

Some states are imposing age and advertising restrictions

In 2023, 11.4% of 12th graders said they had used hemp-derived delta-8 THC in the past year. Easy access to any substance can encourage use, and THC can have negative impacts on the adolescent brain.

While federal law prohibits the sale of tobacco and alcohol to individuals under 21, there is no similar national requirement for hemp. But at least 27 states that permit the sale of hemp-derived products now have minimum age requirements, and several others have pending legislation.

Lessons from the tobacco market also demonstrate that advertising restrictions can reduce the use of legal but potentially harmful products. Most efforts to curtail hemp advertising focus on youth. Sixteen states restrict the use of packaging and marketing materials that may appeal to minors. Meanwhile, federal regulations also limit youth-targeted marketing.

There are fewer restrictions on advertising to adults. The Food and Drug Administration does prohibit using unverified health claims to sell hemp products, but this standard gives the industry plenty of leeway. Hemp ads often tout their purported physical benefits, like reducing pain or improving sleep, or portray them as mood-boosters that can make one feel euphoric and aroused, with few downsides.

Other states are establishing potency limits

The use of products high in THC has been linked to greater risk of cannabis dependence and adverse mental health outcomes. Concerns about product potency have led all states with recreational marijuana markets to limit the amount of delta-9 THC in edible products. This threshold is typically around 10 milligrams, a dose that’s strong enough to affect most people.

Hemp is a different story. To satisfy federal requirements, hemp just has to have less than 0.3% delta-9 THC by weight. This limit sounds low, but the weight-based metric does not account for heavier products, like food and drinks.

For example, a 50-gram candy bar – roughly the size of a Snickers bar – with 150 milligrams of hemp-derived delta-9 THC is legal in the 34 states that don’t have milligram caps on hemp products. This is a dose 15 times higher than what any recreational marijuana market allows. Meanwhile, states that only restrict hemp’s delta-9 content also leave the door open to products with high amounts of other forms of THC.

At least 13 states have responded to potency concerns by adding milligram caps on the total THC permitted in a single serving of a hemp product. Some of these limits are so low – 1 milligram or less in Connecticut, New York, Montana and Rhode Island – that one serving is unlikely to cause impairment.

Enforcement is a wild card

Only regulations that are enforced are effective, and states differ in the level of energy they devote to industry oversight.

In Virginia, the Office of Hemp Enforcement has issued over $12 million in fines to noncompliant hemp retailers since its creation in 2023. On the other end of the spectrum, Massachusetts considers hemp-derived THC products illegal, but it has not provided local jurisdictions with funding for enforcement, resulting in continued availability of prohibited products.

Some states with legal hemp markets have added additional sales taxes to help fund enforcement. In Nebraska, Missouri and Connecticut, attorneys general have sued hemp retailers for selling illegal items, marketing to minors and engaging in deceptive trade practices.

As the hemp industry expands, so will concerns about how to protect public health. The demand for THC, and the market to supply it, continues to grow. If lawmakers want to develop industrywide safety standards or deal with the challenges of online marketplaces that sell hemp products to minors, it will take action from Washington. In the meantime, many states and policymakers are exploring an expansive middle ground between unfettered access and blanket bans.The Conversation

Katharine Neill Harris, Fellow in Drug Policy, Rice University

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

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