Comment est fixé le prix d’un litre de carburant ?

Source: The Conversation – France (in French) – By Salomée Ruel, Professeur, Pôle Léonard de Vinci

Pour un litre d’essence à 2,03 euros, le droit d’accise (ex-TICPE) représente 40,4 %, le pétrole brut 28,6 %, la distribution 14,4 %, la TVA 8,6 %. Gautier Normand/Shutterstock

Les prix à la pompe montent comme une fusée, mais descendent comme une plume. Un paradoxe en apparence mystérieux. En réalité, un litre de carburant est la somme de trois paramètres : le produit, à savoir le pétrole brut qui est ensuite raffiné, le couple logistique et distribution, et surtout les taxes. Comprendre cette décomposition clarifie les éventuelles marges de manœuvre de l’État, des producteurs et des distributeurs.


Au début était le produit, l’« or noir ». Le carburant vient du pétrole brut, souvent indexé sur le prix du Brent, converti du dollar vers l’euro, puis transformé dans des raffineries. À l’ouverture de la bourse, le 15 février 2026, le prix d’un baril de Brent était de 68,54 dollars (59,77 euros), de 100,88 dollars (87,98 euros) le 24 mars 2026 et de 106,6 dollars (92,97 euros) le 30 mars 2026.

Décomposition du prix de SP95 en France en 2026.
Roole

Logiquement, lorsque le prix d’un baril de Brent augmente (ou quand l’euro baisse), le coût de matières premières dans le prix final du carburant augmente lui aussi. À l’inverse, si le prix du pétrole brut diminue, mécaniquement le coût de matière première baisse, mais pas toujours instantanément ! En effet, il existe des délais liés aux stocks ou aux circuits d’approvisionnement.

Un ordre de grandeur aide à se repérer : un baril de Brent contient 159 litres. Une variation de dix dollars supplémentaires par baril (8,69 euros) fait monter le prix d’un litre d’essence de 6 cents de dollars (0,052 centime d’euro) « avant taxes », auxquels s’ajoutent les effets du taux de change et du raffinage.

Prix d’un baril de Brent au 31 mars 2025, 73,76 dollars ; au 31 mars 2026, 115,04 dollars.
Boursorama

Du dépôt pétrolier vers la station-service

Une autre partie du prix concerne le transport, le stockage et la vente de carburant depuis les dépôts pétroliers vers les stations-service.

Ces coûts logistiques augmentent année après année du fait de l’inflation – 5,2 % en 2022 et 0,9 % en 2025. Des salaires plus hauts ou une mise aux normes auront des conséquences sur le prix du carburant. D’après l’Insee, depuis 2022, les coûts de transport-distribution ont augmenté « plus modérément » que le pétrole brut et le raffinage, mais tout de même d’environ + 9 centimes d’euros par litre sur la période étudiée.

Avant même la marge des stations-service, une part du prix reflète des marges en amont, notamment la marge de raffinage et les conditions du marché de gros. Elles peuvent varier rapidement, notamment en cas de tensions logistiques.

Autre point important : malgré les débats, la marge nette d’une station-service reste généralement faible. De 2 centimes d’euros par litre pour les stations en grande distribution à environ 8 centimes d’euros par litre pour des stations plus onéreuses du réseau des indépendants.

Les consommateurs peuvent suivre en temps réel les prix des carburants dans les stations-service de l’Hexagone.
Gouv.fr

Taxes de l’État

Les taxes, fixées par l’État et complétées par les régions, sont la part la plus visible du prix d’un litre de carburant. Elles représentent entre 50 % et 60 % du prix final, selon le type de carburant et le niveau du baril. Résultat : quand le prix du brut varie, seule une partie du prix à la pompe peut s’ajuster, le reste étant fiscal et donc relativement rigide.

Deux éléments sont à prendre en compte :

  • L’accise (ex-taxe intérieure de consommation sur les produits énergétiques, ou TICPE), qui représente 36 % du prix à la pompe du gazole et 39 % de celui du sans-plomb (SP95). Le montant fixe par litre (en 2026, hors majorations régionales, est de 68,29 centimes d’euros par litre pour l’essence et 59,40 centimesd’euros par litre pour le gazole. L’accise nationale est stable depuis 2018.

  • La taxe sur la valeur ajoutée (TVA), à 20 % depuis 2006, qui s’applique sur le prix hors taxe, mais aussi sur l’accise. Quand le prix du produit monte, la TVA augmente mécaniquement.

En 2025, toutes les régions, sauf la Corse, ont adopté la majoration maximale du taux de l’accise.

Effets contre-intuitifs d’une baisse de taxe

Du côté de l’État, le principale marge de manœuvre est fiscale. Par exemple, modifier l’accise temporairement ou durablement, et jouer sur des dispositifs de compensation comme les « remises » universelles ou ciblées.

En 2026, le gouvernement de Sébastien Lecornu privilégie un plan de soutien de 70 millions d’euros avec des « aides ciblées ».




À lire aussi :
Comment la révolution iranienne engendra le second choc pétrolier de 1979


Toute baisse de taxe a un coût budgétaire très significatif, car l’accise sur les carburants reste une recette majeure. En 2022, les remises sur les prix à la pompe avaient coûté plus de huit milliards d’euros à l’État ; en 2023, les chèques carburants près d’un milliard.

À noter un élément essentiel contre-intuitif : quand les prix augmentent, les automobilistes finissent souvent par réduire leur consommation. Or, l’accise est perçue par litre. Par conséquent, si les volumes baissent, les recettes d’accise baissent aussi, ce qui peut annuler (voire inverser) le gain de TVA lié à un prix plus élevé.

Marges (faibles) des distributeurs

Affiche de l’« opération transparence » carburant.
40 millions d’automobilistes, CC BY-NC

Côté distributeurs, les stations-service, comme celles Shell, Avia, TotalEnergies, Carrefour, Leclerc ou Esso, peuvent ajuster leurs marges. Sur un produit très concurrentiel comme le carburant, il n’est question que de quelques centimes seulement.

C’est pourquoi la Fédération nationale de l’automobile et l’association 40 millions d’automobilistes (opposée aux radars urbains et aux pistes cyclables à Paris après le confinement) ont lancé le 19 mars 2026 « l’opération transparence ». L’enjeu : afficher à leur caisse le détail précis du prix d’un litre de carburant.

« Rockets and Feathers »

« Les prix montent comme une fusée, mais descendent comme une plume. » En économie, ce phénomène est connu sous le nom de Rockets and Feathers. Une étude sur le marché britannique souligne que les prix de détail s’ajustent plus rapidement quand les coûts augmentent que lorsqu’ils baissent. Une autre étude, aux États-Unis, confirme cette contradiction.

Évolution des prix des carburants en France de 2007 à 2026.
Roole, CC BY-NC

Cette asymétrie apparaît pour plusieurs raisons.

Délais et stocks

Une station vend « aujourd’hui » du carburant acheté « hier ». Si le brut baisse, le prix « théorique » baisse tout de suite, mais le carburant en cuve a été payé à l’ancien coût.

À l’inverse, quand les coûts montent, le risque de vendre à perte rend l’ajustement plus rapide. Car, la vente à perte est une pratique commerciale interdite.




À lire aussi :
Pourquoi les frappes sur l’Iran nous rappellent qu’il est urgent d’abandonner le pétrole


Coûts d’ajustement et de coordination

Dans beaucoup de réseaux de distribution, les prix sont modifiés « par salves » plutôt qu’en continu. Les stations ne révisent pas leur affichage à chaque microvariation du marché, mais à des moments précis (par exemple, une ou deux fois par jour), souvent en regardant les prix des stations voisines. Ce mode d’ajustement peut rendre les baisses plus lentes, parce que la station attend davantage d’informations (confirmation de la baisse) ou le « bon moment » pour s’aligner.

Comportement des automobilistes

Quand les prix flambent, les consommateurs comparent plus, changent de station, et la concurrence « s’active » : d’où les mises à jour de prix plus régulières. Quand les prix baissent, la pression concurrentielle est généralement moins intense. La baisse se diffuse alors plus lentement.

Taxes « rigides »

La présence d’une accise fixe, ou « rigidifie », le prix. Quand le produit baisse, la part fiscale reste la même. Logiquement, la baisse totale à la pompe est mécaniquement moins spectaculaire que la variation du pétrole (et donc, parfois moins visible).

Coûts à long-terme

Quand l’actualité géopolitique se tend, notamment dans le détroit d’Ormuz, c’est surtout le « paramètre produit » qui s’emballe, puis qui se transmet implacablement vers les pompes des stations-service. Par conséquent, les automobilistes voient leur facture en carburant augmenter inexorablement.

Pour pallier ces hausses tarifaires, l’État dispose d’un levier réel via les taxes (TVA et droit d’accise), mais il est politiquement sensible et coûteux pour les finances publiques.

Les producteurs de pétrole, comme le Canada, l’Arabie saoudite ou le Kazakhstan, influencent l’amont via le niveau de production et le prix d’un baril de pétrole brut (Brent). Les distributeurs jouent surtout sur la vitesse de répercussion des prix, avec des bénéfices limités.

Ces marges de manœuvre existent, mais elles sont rarement immédiates, et presque toujours assorties d’un coût à moyen terme et long terme.

The Conversation

Salomée Ruel ne travaille pas, ne conseille pas, ne possède pas de parts, ne reçoit pas de fonds d’une organisation qui pourrait tirer profit de cet article, et n’a déclaré aucune autre affiliation que son organisme de recherche.

ref. Comment est fixé le prix d’un litre de carburant ? – https://theconversation.com/comment-est-fixe-le-prix-dun-litre-de-carburant-279632

Pam Bondi’s extreme political loyalty to Trump wasn’t enough to save her job

Source: The Conversation – USA – By Austin Sarat, William Nelson Cromwell Professor of Jurisprudence and Political Science, Amherst College

President Donald Trump participates in a roundtable discussion in Memphis, Tenn., with Attorney General Pam Bondi on March 23, 2026. AP Photo/Bruce Newman

After President Donald Trump fired Attorney General Pam Bondi on April 2, 2026, news reports suggested that she fell from grace, not for being too independent, but for not being effective enough at defending him and prosecuting his political enemies.

As The New York Times reported the previous day, Trump was disappointed with “Ms. Bondi’s handling of the Jeffrey Epstein files, which has become a political liability for Mr. Trump among his supporters. He has also complained about her shortcomings as a communicator and vented about what he sees as the Department of Justice’s lack of aggressiveness in going after his foes.”

The president has long indicated that whoever served as attorney general in his administration should see themselves as his lawyer rather than as someone representing the U.S. government.

During his first presidential term, Trump was gravely disappointed with Jeff Sessions, his first attorney general, who recused himself from the investigation into alleged political interference in the 2016 election. He replaced Sessions with William Barr, who abandoned Trump when the president did not accept the results of the 2020 election.

Having learned from those mistakes, Trump set out to find a political ally and loyalist to take the helm at the Justice Department in his second administration.

As a scholar of law and politics, and someone who has written about the role of the attorney general, I think Trump’s desire has a familiar ring to it. It is not unusual for presidents to put people who share their views and policy preferences into the role. But Trump has gone far beyond what is usually done.

A man dressed in a suit and tie lifts his right hand in front of a panel of lawmakers.
Jeff Sessions is sworn in as attorney general before the House Judiciary Committee on Capitol Hill on Nov. 14, 2017.
AP Photo/Alex Brandon

Bondi’s ascent

Florida Congressman Matt Gaetz was Trump’s first choice for attorney general during the president’s second term. Many commentators viewed Gaetz as a firebrand who was temperamentally unsuited for that position. Some criticized him for calling the president an “inspirational leader of a loving and patriotic movement” in the aftermath of the Jan. 6, 2021, attack on the Capitol. In the face of growing opposition generated in part by allegations of his misconduct, Gaetz withdrew.

Trump turned to Bondi a few hours later. She had served as Florida’s attorney general and drawn praise from across the political spectrum for her professionalism.

A bipartisan group of former state attorneys general wrote a letter attesting to their “firsthand knowledge of her fitness for the office” and her “wealth of prosecutorial experience and commitment to public service.”

In addition, as PBS noted at the time of her appointment, Bondi was “a longtime Trump ally and was one of his lawyers during his first impeachment trial, when he was accused — but not convicted — of abusing his power as he tried to condition U.S. military assistance to Ukraine on that country investigating then-former Vice President Joe Biden.”

She also showed her loyalty by attending Trump’s New York trial for paying hush money to porn actor Stormy Daniels, with whom he allegedly had an affair.

At the time of her nomination, Bondi seemed to have the attributes of an attorney general. She had the credentials to take on the job of running the DOJ and the confidence of the president who appointed her.

From confirmation to downfall

During her confirmation hearings, Bondi promised to safeguard the Justice Department’s independence and bolster its transparency. She also vowed to not serve as the president’s personal attorney.

And in response to a question from Rhode Island Senator Sheldon Whitehouse, she pledged in January 2025 that “there will never be an enemies list within the Department of Justice.”

But she also showed her willingness to joust with Democrats on the Senate Judiciary Committee. She hewed to the MAGA script by refusing to say that the president had lost the 2020 election. And she mounted a spirited attack on the Biden Justice Department, which she claimed had been “weaponized for years and years and years.”

A woman speaks in front of a microphone as a man stands behind her.
Attorney General Pam Bondi and Deputy Attorney General Todd Blanche speak to reporters in Washington on March 18, 2026.
Nathan Posner/Anadolu via Getty Images

Once in office, Bondi took on the difficult task of leading the Justice Department while also pleasing the president. She stood by when Trump used an appearance at the department to give, according to The New York Times, a “grievance-filled attack on the very people who have worked in the building and others like them.” The Times added: “He appeared to offer his own vision of justice in America, one defined by personal vengeance rather than by institutional principles.”

Bondi apparently did not do enough to deliver on that version of justice.

Last year, Trump had to urge Bondi to take action against his political enemies, including former FBI Director James Comey, California Senator Adam Schiff and New York Attorney General Leticia James.

“They’re all guilty as hell,” Trump posted on his social media platform, Truth Social, “but nothing is going to be done. “We can’t delay any longer, it’s killing our reputation and credibility,” he added. “They impeached me twice, and indicted me (5 times!), OVER NOTHING. JUSTICE MUST BE SERVED, NOW!!!”

Bondi took her marching orders and launched investigations of those the president named. However, she was not able to secure any convictions. NBC News quoted a former official in the Trump White House who said that failing to secure indictments “is a problem for job security with the president.”

If that wasn’t enough, Trump was also reportedly frustrated with the way Bondi had handled the release of the Epstein files, first promising full disclosure and then botching the rollout of the files.

Contending visions of the attorney general’s job

Bondi’s tenure illustrates the conflicting visions of what an attorney general should do that animate today’s American politics.

The questions Democrats asked her during her confirmation were designed to get her to commit to their view of what the attorney general should do. Those questions signaled their belief that anyone occupying that office should maintain their distance from the president and uphold the Justice Department’s independence.

But right from the start of the republic, presidents have chosen close political allies to serve as attorney general.

It’s common for presidents to appoint their friends and supporters to be attorneys general. Since Franklin D. Roosevelt, many presidents have chosen their campaign manager or their party’s national chairperson to be attorney general of the United States.

But even compared with this history, Trump and his allies have a radically different vision, seeing the attorney general as just another Cabinet member whose responsibility is to carry out the president’s policies and implement his directions. As Trump put it in a 2017 interview with The New York Times, he has the “absolute right to do what I want to do with the Justice Department.”

In the end, it seems that Bondi was fired for her failure to be effective in the political role assigned to her. It is likely that the president will want to replace her with someone even more political than she was, who promises to deliver more of the results he wants.

The Conversation

Austin Sarat 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. Pam Bondi’s extreme political loyalty to Trump wasn’t enough to save her job – https://theconversation.com/pam-bondis-extreme-political-loyalty-to-trump-wasnt-enough-to-save-her-job-279926

The nonprofit status of NCAA athletic departments is starting to raise questions

Source: The Conversation – USA (2) – By Andrew Urbaczewski, Professor of Business Information and Analytics, University of Denver

University of Michigan star forward Yaxel Lendeborg revealed that he’d been offered millions of dollars to transfer to another school. Gregory Shamus/Getty Images

With all the talk of busted brackets, game-winning shots, point spreads and Cinderellas, it was easy to miss the eye-popping offer University of Michigan star forward Yaxel Lendeborg claimed to have received during the first weekend of March Madness.

Lendeborg told The Associated Press that the University of Kentucky had dangled between US$7 million and $9 million to entice him to transfer there in 2025.

Though University of Kentucky head coach Mark Pope called it “100% false” in a subsequent interview, the numbers being thrown around show just how big a business college sports have become. CBS and Turner are paying the NCAA about $1.1 billion annually through 2032 to air March Madness games. Recent court decisions, settlements and NCAA policy changes have opened the door for top college athletes like Lendeborg to earn millions of dollars.

Yet athletic departments are still operating as tax-exempt nonprofits, even as a growing chorus of voices, from academia to politics, is wondering whether this designation should be reevaluated.

The nonprofit mission

Most private universities operate as 501(c)(3) organizations under the tax code. This IRS designation means it is a nonprofit that serves a public or charitable mission. These nonprofits don’t have to pay federal taxes and can receive tax-deductible donations.

Because public universities are already government entities, they don’t need to apply for 501(c)(3) status. However, their affiliated fundraising arms – including those supporting athletics – are set up as separate nonprofit foundations and typically need to apply for and receive that designation.

According to the IRS, nonprofits can receive this tax-exempt status if they advance the following missions: “religious, educational, charitable, scientific, literary, testing for public safety, fostering national or international amateur sports competition (as long as it doesn’t provide athletic facilities or equipment), or the prevention of cruelty to children or animals.”

This designation means that universities will reinvest any leftover funds after expenses – they don’t use the word “profit” – into programs that advance the university’s mission. These include facilities, research, academic departments and scholarships.

Donors to a university are able to receive tax deductions for their support. They can usually direct their donations toward funding a specific mission – perhaps in memory of a favorite professor, supporting cancer research or to support extracurricular activities such as sports.

In March 2025, for example, philanthropists Maurice and Carolyn Cunniffe gave $100 million to Fordham University to support STEM education, and in December 2025, Acrisure CEO Greg Williams and his wife, Dawn, gave $401 million to Michigan State University, designating over 70% of their historic donation to Michigan State athletics.

A windfall for some college athletes

I want to return to one phrase from the IRS’ requirements for being designated as a tax-exempt nonprofit: “fostering national or international amateur sports competition.”

In 2026, there’s very little about college basketball and football – and, increasingly, sports such as golf and ice hockey – that could be considered “amateur,” which technically means that athletes are not paid salaries or wages for playing and do not compete as their primary profession.

In recent years, the NCAA has allowed athletes to earn money through endorsements and sponsorships. Meanwhile, the recently approved settlement in House v. NCAA allows schools to share roughly 20% to 22% of its revenue from licensing, media rights and ticket sales directly with athletes, further complicating the traditional definition of amateurism.

The compensation college athletes can receive happens on top of a five-year scholarship that covers the full cost of attendance for some athletes. At the University of Denver, where I teach, five years of attendance is valued at over $435,000.

Greg and Dawn Williams made a historic $401 million donation to Michigan State University, $290 million of which was earmarked for athletics.

Schools argue that athletics are part of their educational mission, with revenue from football and basketball funding sports that make far less money, such as swimming and gymnastics.

But it’s gotten to the point where playing certain college sports can be as lucrative – if not more so – than being a professional athlete.

Chicago Bears quarterback Caleb Williams reportedly had to take a pay cut as a rookie after leaving the University of Southern California.

Former Notre Dame women’s basketball standout Olivia Miles passed up likely being the second pick in the WNBA draft and instead transferred to Texas Christian University, where, according to a recent ESPN E60 report, she is earning over 10 times what she would have been paid in the WNBA, through a mix of sponsorships and direct payments.

Eligibility extensions

Some college athletes, such as quarterback Diego Pavia, who most recently played for Vanderbilt University, have sued the NCAA to extend their eligibility beyond the current limit of four seasons and five calendar years. It isn’t unheard of for a player to get seventh, eighth and ninth years of eligibility.

Meanwhile, student athletes are routinely playing for two, three or four different schools during their collegiate years. The so-called “transfer portal” – a period when college athletes make it known that they are willing to switch schools – operates like a free agent market in pro sports leagues.

This is a far cry from college sports in the 1970s and ’80s, when student athletes were expected to earn their degrees in four years. Until 1968 – and 1972 for football and basketball – freshmen weren’t even allowed to play at the varsity level. The thinking went that they needed a year of adjustment to get a handle on their coursework.

For some of today’s college athletes, school isn’t in the picture. Before the 2026 College Football Playoff national championship, a reporter asked University of Miami quarterback Carson Beck, a transfer from Georgia, whether he had to worry about class that week.

His response?

“No class. I graduated two years ago.”

A business separate from the university?

This isn’t to say college athletes definitely don’t deserve to be compensated beyond the value of their scholarships. Perhaps they do. But the idea that athletic departments and their associated fundraising arms should be classified as tax-exempt nonprofits promoting education and amateur sports strains credulity.

In November 2025, U.S. Sen. Maria Cantwell submitted a letter to the chief of staff for the U.S. Congress Joint Committee on Taxation.

“Given the evolving market dynamics of college sports,” she wrote, “legitimate questions have been raised about whether it is time to rethink the tax-exempt regime under which college sports currently operates.”

At this point, college sports strike me as a business only loosely tied to the university. Education scholar John R. Thelin has pointed out how athletics can function like a separate corporation, tied to the university only through scholarships, logo licensing and marketing.

So what might happen if athletic departments lost their tax-exempt, charitable status?

For one, the government would treat them as businesses, and businesses pay taxes. And their donors and boosters would no longer be eligible to receive tax deductions for gifting money to a program, just like a regular customer at a restaurant doesn’t receive a tax break for regularly dining there.

This isn’t unheard of: Some universities already have taxable, for-profit arms, whether it’s in real estate development, hospitality or startup incubators.

To some donors, their love for their alma mater may outweigh any tax benefit. But others may find themselves more willing to fund other causes – in or outside a university – that more closely align with the nonprofit mission.

The Conversation

Andrew Urbaczewski 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 his academic appointment.

ref. The nonprofit status of NCAA athletic departments is starting to raise questions – https://theconversation.com/the-nonprofit-status-of-ncaa-athletic-departments-is-starting-to-raise-questions-278184

Kratom poisonings surged 1,200% over the past decade, and regulators are struggling to keep up with the dangers

Source: The Conversation – USA (3) – By Andrew Kolodny, Medical Director of Opioid Policy Research, Brandeis University

Kratom powder is produced by the plant Mitragyna speciosa. iStock via Getty Images Plus

Proposals to ban or regulate kratom, a plant-based substance sold in gas stations, convenience stores and vape shops, are making headlines in local newspapers across the United States. But as lawmakers debate whether to regulate or ban kratom, public health problems associated with the drug continue to rise.

In late March 2026, the Centers for Disease Control and Prevention reported that hospitalizations and poisonings involving kratom have increased by more than 1,200% over the past decade.

At legislative hearings, families share tragic stories of lives cut short by kratom overdoses and addiction.

On the opposing side, lawmakers are also hearing from lobbyists representing the kratom industry and kratom users who insist that it is a safe, natural substance that boosts mood and energy, relieves pain and even helps people overcome opioid addiction.

As a physician who treats opioid addiction and studies the opioid crisis, I have followed this debate closely.

Scientific evidence shows that kratom carries real risks that are often downplayed or misunderstood. Kratom’s rising use over the past decade coincided with the opioid crisis, as people searched for alternatives to prescription opioids. Because kratom comes from a plant and is marketed as “natural,” many people wrongly assumed it was safe. That belief helped fuel its use. Today, about 1.7 million Americans report using kratom each year.

Alabama is one of six states that have banned kratom as of early 2026. But it still makes its way onto store shelves in the state.

How kratom works

The U.S. Food and Drug Administration has warned consumers for more than a decade that kratom can cause serious problems, including liver disease, seizures, addiction and death.

According to the FDA, research and adverse event reports make clear that “compounds in kratom make it so it isn’t just a plant – it’s an opioid.”

Kratom comes from the plant Mitragyna speciosa, a tropical evergreen tree native to Southeast Asia.

People use kratom to experience the opioid effects, including pain relief and improved mood. But with daily use, tolerance to these effects results in a need for higher doses, and users experience withdrawal symptoms when they try to stop.

Kratom’s effects come from compounds in its leaves, including mitragynine and 7-hydroxymitragynine, often called 7OH. After kratom is consumed, some of the mitragynine is changed in the body into 7OH. This matters because mitragynine is a weak opioid, while 7OH is a much stronger opioid, which can increase the intensity of the opioid effects and lead to overdose. Both compounds bind to opioid receptors in the brain, which triggers chemical changes that, with regular use, can lead to dependence and withdrawal symptoms similar to those caused by oxycodone or heroin.

Some in the kratom industry argue that only newer products with boosted levels of 7OH are dangerous. But the evidence does not support that claim. Deaths linked to kratom were already rising before the newer 7OH products appeared on the market in late 2023.

Kratom is not a treatment for opioid addiction

Another claim often made in legislative hearings is that kratom can treat opioid addiction. The American Kratom Association, a lobby group that represents the kratom industry and its consumers has even promoted kratom as a solution to the opioid crisis. One of the group’s videos claims that kratom can eliminate opioid addiction altogether.

That incorrect claim is based on a partial truth. If someone in opioid withdrawal uses kratom, their withdrawal symptoms may temporarily improve. But the same effect occurs with any opioid. A person dependent on heroin can relieve withdrawal by taking oxycodone, and a person dependent on oxycodone can relieve withdrawal by taking heroin.

But relief of withdrawal symptoms does not make a drug a treatment for opioid use disorder; it simply shows that the drug is an opioid. Effective, evidence-based treatments already exist, including medications such as buprenorphine and methadone, which have been shown to reduce cravings, prevent withdrawal and lower the risk of overdose. These medications also allow patients to feel and function normally.

When it comes to kratom, the FDA has been clear: It is not approved for any medical use and should not be used to treat opioid addiction.

Using kratom exposes people to risks that are not well understood. Some research suggests its primary compound may cause dangerous heart problems, including sudden death. Kratom has also been found to contain high levels of lead, which can damage the brain and other organs. For women of childbearing age, kratom may pose a risk to the fetus if pregnancy occurs. And using kratom during pregnancy may lead to infants experiencing opioid withdrawal at birth.

Newborn baby lying face down with monitors attached in a hospital bed.
Kratom poses particular threats to pregnant women and has the potential to cause opioid withdrawal in newborns.
Salwan Georges/The Washington Post via Getty Images

Bold claims, limited evidence

Some advocates argue that keeping kratom available could help states reduce deaths from fentanyl and other opioids. But the available evidence does not support this idea.

If kratom were helping reduce fentanyl overdose deaths, states that banned kratom might be expected to have a higher rate of fentanyl deaths. That has not been the case. For example, Vermont, one of the first states to ban kratom, has not fared worse than other states. In fact, Vermont has seen one of the largest declines in opioid overdose deaths in the country.

Kratom supporters often point to personal stories from users who say it helps them. These experiences should not be dismissed, but personal stories are not the same as scientific evidence.

With opioids, cycles of withdrawal followed by relief when a dose is taken can make a drug seem helpful, even when it is causing harm. That is why controlled studies, which can reliably distinguish true benefits from the relief of withdrawal symptoms, would be needed to prove that kratom’s benefits outweigh its risks. But those studies have not been done.

For now, the evidence shows that kratom is an opioid with real risks – not a harmless supplement.

The Conversation

Andrew Kolodny is president of Physicians for Responsible Opioid Prescribing, a nonprofit organization that advocates for more cautious use of prescription opioids and served as an expert witness on behalf of state and local governments in the national opioid litigation.

ref. Kratom poisonings surged 1,200% over the past decade, and regulators are struggling to keep up with the dangers – https://theconversation.com/kratom-poisonings-surged-1-200-over-the-past-decade-and-regulators-are-struggling-to-keep-up-with-the-dangers-277161

As oil shortages deepen, wartime rationing offers a guide for today’s governments

Source: The Conversation – Canada – By Henri Chevalier, PhD student at School of Environment, Resources and Sustainability, University of Waterloo

With global oil supply under pressure from the U.S.-Iran war, governments may need to bring back tools many assume belong to the past: rationing and price controls.

Some countries are already moving in that direction. The Philippines has declared a national emergency in response to energy supply risks, while South Sudan has begun rationing electricity in its capital, Juba, and Mauritius has imposed restrictions aimed at reducing consumption and limiting waste.

These developments echo historical precedents. My research, recently published in Sustainability: Science, Practice and Policy, draws on the case of British clothing rationing during the Second World War to show that when essential goods become scarce, governments cannot rely on price alone to manage the crisis.

When left to market forces, access to basic goods becomes dependent on those who can pay most, meaning lower-income households are often hit hardest.

A global supply shock

Since U.S. and Israeli strikes on Iran triggered a wider conflict and effectively shut down shipping through the Strait of Hormuz, global oil supply has fallen by about eight million barrels per day — roughly eight per cent of world demand.




Read more:
What is the Strait of Hormuz, and why does its closure matter so much to the global economy?


The disruption of a route carrying about 20 per cent of the world’s oil supply is pushing prices up and availability down, creating conditions similar to those Britain faced before rationing.

In the face of such an oil shock, governments around the world should learn from the British clothing rationing system by implementing rationing and price controls.

That was the case during the oil shocks of the 1970s in Canada. Governments kept domestic oil prices under control and helped cover the cost of more expensive imports.

Canada also designed a national gasoline rationing plan in 1979, using printed stamps to limit private motorists’ fuel use while giving priority access to ambulances, freight carriers and farmers.

What history can teach us

The United Kingdom faced major supply disruptions during the Second World War, prompting the introduction of rationing to mitigate the effects of material shortages, inflation and mounting pressure on civilian supply.

To achieve this, the British rationing system relied on three main policy tools.

The first was a coupon system. Introduced in 1941, coupons were tied to material use rather than price. Each person received a fixed number of clothing coupons per year, starting at 66 per person (about two-thirds of pre-war levels) and fell to 36 by 1946.

Each type of garment required a set number of coupons depending on how much material it used. For example, a wool dress might cost around 11 coupons, while a shirt might cost five and a pair of stockings two. Cutting just two coupons per person saved about 27 million metres of fabric.

The second was the Utility Clothing Scheme. Launched in 1942, it provided affordable, durable clothing through strict standards and fabric-saving rules. Shortening men’s shirts by five centimetres and removing double cuffs saved 3.3 million square metres of cotton. By 1943, the scheme covered 80 per cent of British clothing production.

The final was price controls. The Board of Trade was granted the power to fix prices and margins across production and distribution, helping keep “Utility” clothing stable or cheaper while non-Utility prices rose, with Utility items costing about half as much as non-Utility clothing.

Managing scarcity and fairness

These policies led to three major consequences. First, they reduced overall consumption. Under clothing rationing, wool spinning fell by 44 per cent and hosiery industry yarn by 37 per cent, while civilian textile supply and clothing consumption per person dropped by 67 per cent.

Clothing and footwear purchases per capita declined by 34 per cent. Despite six years of war, civilians had access to less than four years’ worth of normal clothing supplies.

Second, they ensured fair access to essentials. Price-controlled rationing helped ensure people still had decent clothing, reducing poverty and preventing severe shortages.

Third, they reinforced a culture of repair and reuse. Building on the repair culture already present in the 1930s, campaigns such as “Make Do and Mend” promoted repair, remaking, modular design and the reuse of materials such as blankets, blackout fabric, food bags, parachute silk, wooden clogs and even dog fur yarn.

A video about clothes rationing in Britain from the Imperial War Museum.

The rationing system not only cut consumption and aligned demand with supply, but also prevented scarcity from becoming a windfall for producers and a punishment for low-income households. It also reduced waste and discouraged overconsumption — all valuable lessons in today’s global oil supply disruption.

That said, the system was not without drawbacks. Britain’s rationing system was also technocratic, bureaucratic and not very democratic.

What governments can do now

Today, the real issue is not whether governments intervene, but whether they do so fairly and effectively.

On March 20, to address the current oil supply squeeze, the International Energy Agency proposed a series of demand-reduction measures, including expanding remote work, lowering speed limits, stengthening public transit use and increased car-sharing use.

While useful, these measures remain short-term fixes. If shortages deepen, governments — including Canada’s — may need to consider the following structural responses:

1. Prepare fair fuel-allocation systems if shortages deepen.

Some governments are already moving in that direction. Sri Lanka introduced a QR code-based fuel authorization system to regulate petrol and diesel distribution, with weekly quotas.

2. Cap excessive prices and margins on essentials.

In Canada’s concentrated fuel and grocery markets, refiners and downstream food firms can widen margins at the expense of consumers. Refining profits surged as pump prices rose faster than crude costs, while processors, distributors and retailers captured 83 cents of every food dollar spent in Canada.

Canada could learn from Austria, Greece and Spain, which have respectively capped fuel retailer margins, grocery margins and rents recently.

3. Use the crisis to build structural economic transformation.

Recurring resource, geopolitical and ecological crises point to the need to reduce dependence on fragile global supply chains, accelerate decarbonization and reorganize the economy around scarce resources through reduced advertising and democratically decided material caps.

This would protect essential needs first, reduce unnecessary production and consumption, and prioritize durable, repairable and sustainable goods.

For those interested in exploring this research further, a more engaging and accessible version of the study is available online.

The Conversation

This research was supported by the Social Sciences and Humanities Research Council of Canada, Coboom, and the HEC Montréal Foundation

ref. As oil shortages deepen, wartime rationing offers a guide for today’s governments – https://theconversation.com/as-oil-shortages-deepen-wartime-rationing-offers-a-guide-for-todays-governments-279193

Danielle Smith’s immigration referendum fuels an ‘us versus them’ divide in Alberta

Source: The Conversation – Canada – By Esra Ari, Assistant Professor of Sociology, Mount Royal University

In 2023, Alberta Premier Danielle Smith mused that she would like to see the province’s population to grow 10 million people. But by 2026, faced with an astronomical budget deficit of $9.4 billion, Smith recently said the “federal experiments in open borders” have contributed to Alberta’s current fiscal woes.

Smith is inviting a public debate on immigration, proposing five immigration-related questions in an October referendum.

Leading questions

The immigration referendum questions are replete with mis- and disinformation, confusing, inaccurate and leading language, and shaped by problematic assumptions unsupported by evidence.

For example, one question asks whether respondents support giving Albertans “first priority to new employment opportunities” while another asks whether only those with “Alberta-approved immigration status” should be eligible for provincially funded social programs

Another question asks if Albertans “support the Government of Alberta introducing a law requiring individuals to provide proof of citizenship, such as a passport, birth certificate, or citizenship card, to vote in an Alberta provincial election.”

Taken together, these questions present the voting public with an “us versus them” narrative, suggesting there’s one group of people called “Albertans” and another called “immigrants.”

While race is not explicitly mentioned in these questions, they enact what French philosopher Étienne Balibar, whose scholarship is seminal to understanding new forms of racism, has described as “racism without race” — when cultural differences are mobilized to marginalize minority communities; in this case, immigrants to Alberta.

An example of this can be seen in a recent social media post written by Bruce McAllister, executive director of the premier’s office: “Why import nations with failed systems when our Judeo-Christian heritage and principles have worked so well here?” Smith defended his statement.

Far-right playbook

Who is considered an Albertan by Smith’s United Conservative Party? Is it people born in Alberta? People born in Canada? Or those who have “Judeo-Christian” heritage?

Like other initiatives by Smith’s government, the scapegoating of immigrants follows a far-right playbook that has been effective in other places, including, most visibly, the United States and parts of Europe.

Ultra-nationalist policies are evident in both the Alberta separatist movement and in the provincial government’s attacks on trans kids in the name of parental rights, book bans and cancelling equity, diversion and inclusion programs.




Read more:
The war on DEI reflects the quiet normalization of white nationalism — in the U.S. and beyond


Alberta’s population has grown by about 600,000 people in the last five years. At least some of this growth is likely attributed to a multi-million dollar campaign by the Alberta Government called “Alberta is Calling” that sought to recruit people to the province.

Alberta has what scholars have described as a “prototypical boom region economy” with no provincial sales tax and the lowest corporate and personal tax rates in the country. Spending for social programs, health care and education is contingent on the price of a barrel of oil.

A possibly apocryphal story in Alberta describes a famous bumper sticker that read: “Please God, let there be another oil boom. I promise not to piss it all away this time.”

Unacknowledged contributions

The combination of Alberta’s petro-economy and the rise of far-right conservative ideology is leading to a more explicitly reactionary and xenophobic politics in the province.

In the years following the Second World War, Germany brought in thousands of “guest workers” from Turkey to help rebuild the country. Eventually, these mostly male workers sought to remain in Germany and bring their spouses and children. There is a quote attributed to the Swiss novelist Max Frisch about these guest workers: “We asked for workers; we got people instead.”

This quote applies to Alberta: The provincial government has spent millions of dollars attracting needed workers to the province. Immigrant workers are over-represented in critical parts of the economy including agriculture, care work and tourism. Other Albertans have benefited — and continue to benefit from — the enormous economic contributions that immigration provides.

Much of this economic contribution is unacknowledged because often the work that immigrants do is out of sight, including jobs in meatpacking plants, trucking, cleaning and low-wage service jobs, often performed under precarious conditions.

Immigrants have been essential to the Albertan economy, but they are, most importantly, human beings. Immigration to Alberta has not been accompanied by investment in housing, health care or education. In fact, investment in K-12 education remains the lowest in the country. The scandal-ridden health-care system is in disarray, with people dying in the emergency rooms and doctors describing it as a “crisis.”

Causing harm

When Smith, the most politically powerful person in the province, launches a frontal attack on marginalized communities using the sanitized language of “direct democracy” and “public debate,” there can be real consequences and harm.

Even before the proposed October referendum, immigrant-serving organizations have reported an increase in racism in Alberta. In the premier’s own riding — the small community of Brooks, Alta., population 15,000 with a large immigrant population — stickers with the words “Make Brooks White Again” have appeared around town alongside racist graffiti.

Historically, targeting racialized groups is a dangerous tactic that has culminated in violence and death. We must resist and call these politics out wherever possible.

The Conversation

Bronwyn Bragg receives funding from the Social Sciences and Humanities Research Council of Canada.

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

ref. Danielle Smith’s immigration referendum fuels an ‘us versus them’ divide in Alberta – https://theconversation.com/danielle-smiths-immigration-referendum-fuels-an-us-versus-them-divide-in-alberta-278577

I watched Artemis II lift off — and witnessed the first humans venture to the Moon since 1972

Source: The Conversation – Canada – By Gordon Osinski, Professor in Earth and Planetary Science, Western University

Even from a distance of several kilometres, the Artemis II rocket looked huge.

Then, there was a moment that felt like an eternity, as around 2,600 metric tons of spacecraft lifted off.

I was honoured to receive an invitation from the Canadian Space Agency to attend this historic launch at NASA’s Kennedy Space Center. I am a professor, an explorer and a planetary geologist. As a member of the First Artemis Lunar Surface Science Team, I have been supporting NASA in developing the geology training for Artemis astronauts.

This launch was one of the most thrilling, but stressful few minutes of my life. Space missions are hard and can be dangerous, especially missions like this where there are so many firsts.

The final 10-second countdown seemed to come so quickly, and then at 6.35 p.m., EDT, on April 1, 2026, the NASA launch commentator uttered those famous words: “We have liftoff.”

I think everyone around me held their breath for those first few critical seconds, and then the significance of the moment sank in. We had just witnessed history in the making. This was the launch of the first crewed flight of NASA’s Artemis program, and the first time since 1972 that humans have ventured to the Moon.

Jeremy Hansen will be the first non-American to fly to the Moon and will make Canada only the second country in the world to send an astronaut into deep space.

Christina Koch and Victor Glover will also make history as the first woman and person of colour to fly to the Moon.




Read more:
Artemis II: The first human mission to the moon in 54 years launches soon — with a Canadian on board


The build up to launch

The first launch windows for Artemis II came and went earlier this year, following issues discovered during wet dress rehearsals. But this time felt different. NASA rolled out the SLS (Space Launch System) rocket on March 20 and decided to skip the wet dress rehearsal and go straight for launch.

You could sense the confidence building.

On the evening before launch day, the Canadian Space Agency held a reception for all the Canadian invitees, as well as several NASA guests. It was like a “who’s who” of the Canadian space program, including most of Canada’s retired astronauts.

There were some lighthearted moments — like when MDA Space CEO Mike Greenly announced there were the limited edition Tim Horton’s “moonbits” for all — but you could tell there was also a lot of emotion in the room.

There were some tears as a video message from Jeremy Hanson’s son, Devon, was played. For me the moment came when I spoke with Jeremy’s parents, who I had met several years earlier. They still live in Ingersoll, not far from London, Ontario, where Jeremy went to high school.

Returning humans to the Moon

At the time of writing, the crew have now had their first sleep in Integrity, the name of their Orion spacecraft.

They are now in a high-Earth orbit, reaching a maximum of 74,000 km from Earth. This is already a huge distance when you consider the orbit of the International Space Station is only around 400 km.

During this first 24 hours, the crew are testing the environmental controls and life support systems, ensuring that everything they need to survive for the next 10 days in space works. If everything looks good, NASA will clear the crew to conduct the translunar injection, and send Integrity to the Moon.

While they won’t be landing, in addition to testing out the Orion spacecraft, the Artemis II crew will be conducting science. They will be working with scientists and engineers in a new science evaluation room in mission control at the NASA Johnson Space Center, to collaborate during operations in real time.

This builds on years of testing and simulations the teams have done together and lays the groundwork for the first surface Artemis mission.

Before the launch, NASA astronaut Christina Koch summed up the feelings of everyone I’ve met on the Artemis program: “It is our strong hope that this Artemis mission is the start of an era where everyone, every person on Earth can look at it and think of it as also a destination.”

I couldn’t agree more.

The Conversation

Gordon Osinski founded the company Interplanetary Exploration Odyssey Inc. He receives funding from the Natural Sciences and Engineering Research Council of Canada and the Canadian Space Agency.

ref. I watched Artemis II lift off — and witnessed the first humans venture to the Moon since 1972 – https://theconversation.com/i-watched-artemis-ii-lift-off-and-witnessed-the-first-humans-venture-to-the-moon-since-1972-279822

Effective storytelling can encourage climate action from policymakers and the public

Source: The Conversation – Canada – By Snigdhodeb Dutta, PhD Student, Department of Biology, Concordia University

Scientists know more about climate change than ever before. So why isn’t the world moving faster to address it?

That was the question at the heart of a round table I recently moderated at Concordia University, and the answers were more practical and more urgent than many in the room expected.

The session, entitled “Communicating Climate Research to Policy and the Public,” took place on March 10 and featured Concordia professor Damon Matthews, Montréal city councillor Peter McQueen and Dominique Paquin, a climate simulation and analysis supervisor at the climate research organization Ouranos.

Their shared diagnosis: the problem is not a lack of data. It’s a failure of translating that data into a message that resonates.

As Paquin noted:

“We have enormous amounts of information on climate resilience strategies. The challenge is that this information rarely makes it into the rooms where decisions are actually made.”

During the session, participants were split into mixed groups and given a single climate finding. Their task: communicate it to three completely different audiences — policymakers, the general public and those working in operational or applied settings. The results were revealing.

Making the abstract clear

people sit in a row behind a table in discussion. behind them is a large screen displaying the words Communicating Climate Research to Policy and the Public
The Communicating Climate Research to Policy and the Public rountable session at Concordia University on March 10.
(Snigdhodeb Dutta)

McQueen said:

“Effective climate communication is not about dumbing down the science. It’s about understanding who you’re talking to and what actually matters to them.”

Nowhere was this clearer than in the skating rink example that drew an audible reaction from the room. Telling someone the global average temperature has risen by 1.2 C lands differently than telling them climate change is already shortening outdoor skating seasons across Canadian cities.

Research shows that rising winter temperatures are reducing the viability of outdoor rinks, with future projections for cities like Montréal, Toronto and Calgary pointing to fewer cold days even under optimistic low-carbon scenarios.

By presenting climate change through such examples, the abstract becomes concrete, the distant becomes local and the data becomes a loss that people can picture.

Panellists argued that framing the issue for different audiences needs to become standard practice, not an afterthought. For policymakers, the groups focused on discussing feasibility and regulatory alignment. For the public, emotional resonance and relatable stakes took over.

For operational audiences — those working in applied or technical roles, such as urban planners, engineers and municipal staff — the focus shifted to implementation and cost.

One proposal that generated discussion was embedding climate context into everyday digital information. Many of us today have smartphones that display the daily weather forecast. Rather than just displaying the current temperature and conditions, devices could also show how those readings compare to pre-industrial baselines.

Small changes in the information environment could shift how millions of people perceive climate change over time.

Engaging communities is critical

The session, ‘Communicating Climate Research to Policy and the Public,’ at Concordia University.

Another key issue that came up is the structural barriers that hinder effective communication. Even when climate messaging lands, it runs into algorithmic filters, media fragmentation and political resistance.

Participants pointed to carbon pricing and stronger enforcement mechanisms as examples of policies that work when the public understands and supports them. Communication and policy, in other words, are not separate challenges. Each depends on the other.

The session also pushed back against the dominance of top-down, global-level climate narratives. Real engagement and climate action, participants agreed, happens at the community level through local voices, grassroots initiatives and youth movements that give people a sense of agency rather than helplessness. Media platforms that amplify these efforts, rather than drowning them out, were seen as part of the solution.

Involving students and young people, sharing successes through local and national media and making initiatives relatable and interactive can help build broader awareness and motivate participation across communities.

Communication is part of research work

Climate researchers should not treat communication as the final step in research and start seeing it as central to the work itself. They shouldn’t just focus on sharing data, but also take part in real engagement and conversations with the general public.

The science is there. The challenge is to make it resonate. From policymakers and community leaders to students and citizens, climate action depends on telling stories that make an impact, clarify stakes and inspire action.

Only when abstract data becomes tangible — whether through a disappearing skating rink, a parched wetland or a vanishing stream — does the urgency of climate change truly hit home. And it is this kind of storytelling, grounded in both evidence and lived experiences, that may ultimately drive the action this moment demands.

The Conversation

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

ref. Effective storytelling can encourage climate action from policymakers and the public – https://theconversation.com/effective-storytelling-can-encourage-climate-action-from-policymakers-and-the-public-278522

Neuroscience explains why teens are so vulnerable to Big Tech social media platforms

Source: The Conversation – Canada – By Salima Kerai, Research Fellow, Centre for Global Child Health, The Hospital for Sick Children; Adjunct Faculty, Dalla Lana School of Public Health, University of Toronto

In a landmark decision, a Los Angeles jury has found that social media company Meta and video streaming service YouTube harmed a young user with addictive design features that led to mental health distress, including body dysmorphia, depression and suicidal thoughts.

Commentators have referred to this as social media’s “Big Tobacco” moment and further lawsuits are pending. The verdict has escalated calls for more regulation of social media platforms across jurisdictions.

Countries like Australia, France and Spain have already introduced age restrictions for social media use. Canada still lacks online harms legislation.

As parents campaign and policymakers consider how to address online harms, one crucial question is often overlooked: Why are teenagers so uniquely vulnerable to these platforms in the first place?

Dopamine hits to immature pathways

Imagine Sara, who at 14 was found unconscious on her bedroom floor after an attempt to take her own life. By every measure, she was thriving: strong in school, supported by family, living in a vibrant community. But behind her bedroom door, she was struggling with something no one could see. She spent hours scrolling, posting and chasing likes until the validation stopped coming.

A quiet sense of not being good enough slowly took root. Despite 150 online followers, she had no one she felt she could truly talk to. She became convinced she was completely alone.

Sara is a composite drawn from clinical and research experience, but her story is common. Like many teenagers, Sara turned to social media to connect, express herself and find a sense of belonging. At first, it felt good. Each quick hit of dopamine drew her back until the habit became hard to control.

Neuroscience shows that heavy social media use can overstimulate the teen brain’s still-developing reward pathways in ways similar to addictive behaviours like gambling.

This immature system also makes teenagers more sensitive to social feedback and less able to cope with rejection. This leaves them vulnerable to highs and lows of online interaction, including the rapid, repeated negative comments that can intensify emotional stress.




Read more:
Australia is banning social media for teens. Should Canada do the same?


Think of the teen brain as a highway under construction. The emotional expressway — the limbic system — is wide open for speeding. The pre-frontal cortex — the brain’s traffic-control centre responsible for judgment and impulse control — is still being built.

This imbalance means that the fast emotional traffic often outruns the signals from the control centre, creating traffic jams in judgment and rational thinking and making it harder for teens to pause, reflect and assess consequences.

Social comparison fuels anxiety

Social comparison deepens this strain further. As Sara scrolled through images of seemingly perfect lives, she felt increasingly inadequate. Envy, insecurity and fear of missing out chipped away at her confidence. At the same time, social media encouraged constant self-monitoring, as she tracked her likes, comments and appearance online.

Research links this kind of inward focus to higher levels of anxiety, especially in teens already under pressure.

Puberty adds another layer. During this stage, the brain becomes more sensitive to social and emotional cues. For girls, these changes often occur earlier and more intensely, helping explain why adolescent girls are disproportionately affected by social media-related anxiety and depression.

CBC’s Christine Birak breaks down what research shows about how using social media is changing kids’ behaviour.

Connected online, disconnected in life

Most time spent on social media is not active or social — it is passive. Trial data in a case between the U.S. Federal Trade Commission and Meta show that only a small fraction of time on Meta platforms involves engaging with friends — about seven per cent on Instagram and 17 per cent on Facebook. The rest is mostly scrolling and watching rather than interacting. This results in an illusion of connection while deepening a sense of isolation.

Large studies across high-income countries consistently link heavy social media use to poorer physical health outcomes too, including shorter sleep and higher rates of obesity. Loneliness is a serious risk. The human need to feel seen and understood is fundamental. When it is not met, the body registers it as stress. Chronic loneliness has been compared to smoking 10 cigarettes a day in terms of its impact on health.

Many Canadian teens describe this paradox clearly: constantly connected online, yet increasingly disconnected in real life. They report pressure to present idealized versions of themselves and to keep up with peers. Online communication, they say, is easy to misinterpret, which can strain relationships and deepen isolation. They feel caught in a push and pull — drawn to connection, but often left feeling worse.

Now what? A call to action

We would not hand a 14-year-old the keys to a car without training, rules and safeguards. Yet we allow that same teenager unrestricted access to platforms designed to capture attention and maximize engagement.

The impacts on their physical and mental health are clear. Research involving more than 9,000 adolescents across eight countries found a strong association between problematic social media use and higher rates of depression and anxiety.

In Canada, suicide is the second leading cause of death for youth aged 15 to 24. Mental illness already costs us $51 billion a year, and 70 per cent of those affected show symptoms during adolescence.

Regulating social media is essential. And it requires a layered approach, much like road safety.

Platforms must be designed more responsibly. Age limits should be clearly defined and meaningfully enforced. And digital literacy education should help young people understand and manage their online experiences.

The question is no longer whether action is needed, but whether it will come in time to protect the next generation.

The Conversation

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

ref. Neuroscience explains why teens are so vulnerable to Big Tech social media platforms – https://theconversation.com/neuroscience-explains-why-teens-are-so-vulnerable-to-big-tech-social-media-platforms-278521

Violences conjugales à Madagascar : comment une vidéo peut-elle aider à briser le silence ?

Source: The Conversation – in French – By Delphine Boutin, Maître de conférences en économie du développement, Bordeaux School of Economics, Université de Bordeaux

Visionnage de la vidéo de sensibilisation aux violences conjugales, Antsirabe, Madagascar.
Nathalie, une animatrice sociale de l’IMF., Fourni par l’auteur

À Madagascar, une loi criminalise les violences domestiques depuis 2020. Mais les défaillances institutionnelles dans la prise en charge des victimes et des survivantes de violences ainsi que le poids des normes sociales imposent souvent le silence. Une étude montre qu’une courte vidéo, diffusée sur les réseaux de microfinance, peut lever les barrières de l’information et transformer les comportements, même au sein du couple.


Dans le monde, près d’une femme sur trois subit des violences au cours de sa vie : un constat qui impose d’identifier des leviers d’action réellement efficaces. À Madagascar, la violence domestique est une réalité systémique mais encore largement invisible. Si les statistiques nationales font état de 41 % de femmes victimes, ce taux grimpe à 59 % dans certaines régions comme le Vakinankaratra (dans le centre de l’île). En janvier 2020, l’adoption de la loi n° 2019-008 renforce la protection des victimes, marquant un tournant juridique majeur. Pourtant, sur le terrain, le silence persiste.

Ce décalage entre ce qu’impose le cadre légal et la réalité s’explique par le poids des normes sociales ancré dans la culture malgache : 41 % des femmes et 29 % des hommes considèrent qu’il est encore justifié qu’un homme batte sa femme dans certaines circonstances (DHS, 2021). Le foyer est protégé par un tabou social tenace : « Ny tokatrano tsy ahaka » (« Ce qui se passe à la maison doit rester secret »). Dès lors, comment encourager les victimes à rompre ce silence ?

La microfinance : un levier de confiance inexploité

Pour répondre à ce défi, nous avons cherché un canal capable d’atteindre les victimes dans un cadre de confiance, en dehors des institutions officielles, souvent perçues comme intimidantes.

Nous avons étudié l’impact d’un dispositif combinant un documentaire vidéo de quinze minutes et une formation renforcée des travailleuses sociales au sein d’une institution de microfinance (IMF), Vahatra, soutenue par l’Agence française de Développement.

Le choix de l’IMF n’est pas fortuit. Premièrement, les IMF disposent déjà d’une infrastructure opérationnelle en place : visites à domicile, rendez-vous réguliers, personnel en contact étroit avec les bénéficiaires, permettant d’intégrer facilement des actions de sensibilisation et d’orientation. De plus, les IMF constituent des espaces de confiance. Les relations construites dans la durée en font des lieux relativement sûrs, où les femmes peuvent se rendre sans éveiller de soupçons et où la parole peut émerger plus aisément.

Cette étude, qui s’inscrit dans un corpus de travaux croissant sur l’efficacité des interventions audiovisuelles contre les violences basées sur le genre (VBG) (Peterman, 2025 ; Alsina et coll., 2024), a pour spécificité de mesurer des comportements réels de signalement plutôt que de simples attitudes déclarées.

Tournage de la vidéo.
Nina Filipkowski, Fourni par l’auteur

La vidéo, conçue en collaboration avec une psychologue et des cinéastes malgaches, s’articule autour de trois piliers : identifier les formes de violence (y compris économique et psychologique) ; informer sur les recours existants (médecins, police, juristes) ; et affirmer qu’aucune violence n’est acceptable. Chaque scénario animé est ponctué par le message d’action : « Je signale » (« Hitatitra aho »).

Une progression significative des connaissances chez les femmes

Pour évaluer l’efficacité de ce dispositif, nous avons mis en place un essai randomisé contrôlé. Entre avril et décembre 2023, la vidéo a été diffusée à 1 429 bénéficiaires lors des journées d’allocation de prêts dans sept agences situées à Antsirabe, chef-lieu de la région du Vakinankaratra. Dans le même temps, 1 500 autres bénéficiaires, qui n’ont pas vu la vidéo, constituaient le groupe de contrôle. Au sein de chacune de ces agences, les mois au cours desquels la vidéo était diffusée ont été assignés aléatoirement parmi les 9 mois de la période d’étude, créant un groupe de bénéficiaires ayant vu la vidéo durant les mois de diffusion et un groupe de contrôle, des bénéficiaires n’ayant pas vu la vidéo durant les mois où la vidéo n’a pas été diffusé. Cette randomisation nous a permis de comparer rigoureusement l’évolution de leurs connaissances et de leurs comportements.

Une enquête finale, menée 5 à 12 mois après le visionnage de la vidéo, révèle des effets durables mais différenciés selon le genre. Chez les femmes, l’impact sur les connaissances est substantiel. On observe une amélioration de l’identification des violences sexuelles (+13 %) et psychologiques (+6 %). Plus significatif encore, leur connaissance des recours possibles a augmenté de 17 %, et leur reconnaissance de l’IMF comme ressource d’aide a plus que doublé (+130 %). L’intervention a également abaissé le seuil de tolérance : les femmes sont plus enclines à recommander un signalement dès le premier acte de violence (insulte, gifle ou rapport sexuel forcé).

Chez les hommes, l’impact est plus nuancé. Si l’identification de la violence économique a progressé (+24 %), la connaissance des procédures formelles de signalement reste stable. Nos entretiens qualitatifs montrent que les hommes privilégient la médiation familiale ou communautaire, craignant qu’un recours à la police ne marque un point de non-retour pour le couple. Cependant, un effet inattendu a été observé. Les hommes ayant visionné la vidéo déclarent avoir perpétré 36 % moins de violences physiques, sans que cela ne se soit traduit par une augmentation d’autres formes de violence envers les femmes.

Le rôle central des travailleuses sociales

Si l’intervention a amélioré les connaissances et les intentions de signalement, qu’en est-il des comportements réels ? Les données d’enquête ne révèlent pas d’augmentation significative du nombre de signalements, probablement en raison de taux de signalement extrêmement faibles (entre 1 % et 8 %), de biais de sous-déclaration persistants malgré nos méthodes de collecte innovantes, et d’une période d’observation limitée (5 à 12 mois).

En revanche, les données administratives de l’IMF montrent que le nombre de signalements effectifs a triplé durant l’année de l’intervention, passant de 7 à 21 cas. Cette hausse s’explique par la combinaison des deux composantes de l’intervention : la vidéo a sensibilisé les bénéficiaires, tandis que la formation a permis aux travailleuses sociales de mieux repérer les signes de violences et d’instaurer le climat de confiance nécessaire pour que les victimes se confient à elles.

Une médecin et deux cinéastes lors du tournage de la vidéo.
Nina Filipkowski, Fourni par l’auteur

Au-delà de l’information : le défi d’une réponse systémique

L’un des enseignements majeurs de cette étude est l’efficacité d’un appui institutionnel. En utilisant les réseaux de microfinance plutôt que des campagnes de sensibilisation isolées, l’intervention bénéficie d’un climat de confiance préexistant et d’un coût de mise en œuvre faible, estimé à environ 4 euros par bénéficiaire. Cette approche permet d’atteindre des populations en situation de vulnérabilité sans créer d’effet de « backlash » (représailles ou aggravation des violences), un risque souvent redouté dans les programmes de lutte contre les violences conjugales.

Cependant, les résultats suggèrent que des messages universels ne suffisent pas. Si les femmes ont massivement intégré les procédures de signalement, les hommes, bien qu’ayant réduit leurs actes de violence physique, demeurent hermétiques aux circuits de recours officiels. Pour ces derniers, la vidéo semble avoir agi comme un déclencheur de changement comportemental individuel plutôt que comme un levier d’adhésion aux institutions. La prévention doit désormais développer des stratégies spécifiques ciblant les normes de masculinité et les croyances sur la résolution des conflits familiaux.

En définitive, si une vidéo de quinze minutes ne peut à elle seule déraciner des normes sociales séculaires, elle prouve qu’un dispositif pragmatique, couplé à un accompagnement humain formé, constitue un premier maillon concret pour briser le cycle de l’impunité. Le défi est désormais de pérenniser ces actions au-delà du stade pilote pour transformer cette prise de conscience en une protection durable.

The Conversation

Les auteurs ne travaillent pas, ne conseillent pas, ne possèdent pas de parts, ne reçoivent pas de fonds d’une organisation qui pourrait tirer profit de cet article, et n’ont déclaré aucune autre affiliation que leur organisme de recherche.

ref. Violences conjugales à Madagascar : comment une vidéo peut-elle aider à briser le silence ? – https://theconversation.com/violences-conjugales-a-madagascar-comment-une-video-peut-elle-aider-a-briser-le-silence-277540