Talk of new atomic tests by Trump and Putin should make UK rethink its role as a nuclear silo for the US

Source: The Conversation – UK – By Tom Vaughan, Lecturer in International Security, University of Leeds

The Russian president, Vladimir Putin, has said that Russia may could carry out nuclear weapons tests for the first time since the cold war.

In what appears to be a response to a statement by Donald Trump on October 30, that he had ordered the US to restart nuclear tests “on an equal basis” with Russia and China, Putin said he’d been advised by his defence staff that it was “advisable to prepare for full-scale nuclear tests”.

At present there is no evidence that either Russia or China is conducting nuclear tests, which were discontinued by most nuclear states after the test ban treaties of the early 1990s.




Read more:
Nukes in space: a bad idea in the 1960s – an even worse one now


Trump may have been reacting to the news of two Russian weapons tests in late October. On October 21, Putin announced that Russia had tested the Burevestnik – the first of a new generation of nuclear-powered cruise missiles. Days later he revealed that Russia had also tested Poseidon, a nuclear-powered and capable underwater drone which operates like a torpedo.

The US Department of Energy has rowed back on the president’s statement, assuring the world that Washington has no plans for test nuclear detonations. It appears that Trump’s order may have come from his confusion between Russia’s recent tests of nuclear-capable delivery vehicles such as Burevestnik and Poseidon, and the testing of actual nuclear warheads.

Nonetheless, the two leaders’ nuclear bluster is a sobering reminder of the dangers posed by nuclear brinkmanship between the US and Russia.

It is worth remembering that at the height of the cold war, the superpowers prepared to settle their confrontation in the territories of central Europe with little regard for the millions they would kill. US strategists hoped that a “tactical” nuclear conflict might contain the war to Europe, sparing the continental United States.

Independent deterrent?

This is the context for the UK public accounts committee releasing a report last week which detailed further “delays, cost inflation, and deep-rooted management failures” in the RAF’s procurement of F-35 stealth fighter aircraft.

The F-35 is increasingly coming to be viewed in some US defence circles as an expensive failure. This year, however, the UK’s Labour government committed to buying 15 additional F-35B aircraft (having already ordered 48), but also adding 12 of the F-35A variant.

The F-35A is configured to carry the B61 nuclear gravity bomb. Although the British government trumpeted the return of “a nuclear role for the Royal Air Force” in the 2025 strategic defence review, the B61 is a US weapon which will be under US command and carried by a US-made platform. The B61 is a “tactical” but still immensely destructive nuclear weapon – which, as during the cold war, is intended for use on European battlefields in the hope of containing any conflict far from the US.

Additionally, the UK’s “independent nuclear deterrent” consists of British “Holbrook” warheads mounted on US Trident II missiles. While sole launch authority rests formally with the UK prime minister, the system is entirely reliant on US support and maintenance of the missiles for its continued operation. In the event of Scottish independence, Britain’s nuclear submarines might have to relocate to the continental US, because there are few suitable UK alternatives to the Faslane base, an hour north of Glasgow.

Elsewhere, in summer 2025, observers reported that US B61 bombs had returned to RAF Lakenheath in Suffolk, to be carried by US Air Force jets. They had been removed in 2008 amid easing tensions between Nato and Russia, but have returned amid more aggressive nuclear posturing by both Washington and Moscow.

The Nukewatch group said: “The new nuclear bombs … are entirely under the control of Donald Trump and could be used without the UK having any say at all in the matter. In fact, we wonder whether the UK government has even been notified by the USAF that the weapons are now stationed at Lakenheath.” The UK government remained silent on the matter.

This integration of UK and US nuclear forces has not been publicly deliberated. Jeremy Corbyn, the last political leader who tried to offer the electorate a meaningful choice on the matter, was forced to backtrack.

Incompatible with democracy

This is a clear demonstration that nuclear weapons and deterrence policies have always been incompatible with democracy. They require huge secrecy, and the speed involved means that launch decisions are out of the public’s hands. Instead, any decisions to use these incredibly destructive weapons – with all that this implies for the planet – are concentrated in the hands of individual leaders.

The logic of nuclear deterrence breaks down, however, once we remember that the UK’s control over its own nuclear weapons – not to mention the US weapons hosted on its soil – is very limited. The US could at any moment withdraw its assistance for the Trident programme, making questions of British willingness to fight a nuclear war irrelevant.

The F-35A purchase redoubles the UK’s commitment to serving as Donald Trump’s nuclear aircraft carrier. It makes the country a target in any nuclear war that might be started by two unpredictable and violent superpowers. Other US allies get the same treatment: Australian analysts lament that the Aukus submarine deal with the UK and US yokes the country’s future “to whoever is in the White House”.

Fortunately, the flipside of this reliance on the US is that it might be relatively easy for the UK to shut down its own nuclear programme. Aside from its role in the Nato nuclear mission, Trident has little strategic value when it comes to deterring the threats actually faced by the UK.

With so much of its nuclear weapons activity farmed out to the US, there may not be many domestic vested interests to oppose a change in UK policy if Washington does turn off the nuclear taps.

If the UK foreign secretary, Yvette Cooper, is serious about continuing Labour’s commitment to “progressive realism”, she should chart an independent path. Alternative, non-nuclear defence policies for the pursuit of internationally responsible “common security” could be implemented by a British government with the confidence to govern from London, not DC.

The Conversation

Tom Vaughan 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. Talk of new atomic tests by Trump and Putin should make UK rethink its role as a nuclear silo for the US – https://theconversation.com/talk-of-new-atomic-tests-by-trump-and-putin-should-make-uk-rethink-its-role-as-a-nuclear-silo-for-the-us-269040

Canada’s food sovereignty depends on better jobs for farmworkers

Source: The Conversation – Canada – By Susanna Klassen, Postdoctoral Researcher, Department of Sociology, University of Victoria

Canada’s ongoing trade dispute with the United States has increased consumer awareness of domestic food products, with some experts arguing that food should be considered a matter of national defence.

While support for buying local food is increasing — one study found two-thirds of Canadians were willing to pay more for local food — there is still much that gets left off the table in conversations about local food.

The “buy local” adage doesn’t address the deeper issues with Canada’s food production systems. Inter-provincial trade barriers, outdated pesticide regulations, food insecurity and other gaps in Canadian food policy all undermine Canada’s ability to build an equitable and sustainable food system.

Most critically, discussions about local food often overlook the very people that make food production possible: farm workers. These workers form the backbone of the agricultural sector, yet many face unsafe working conditions, inadequate pay and exclusion from basic labour protections.

The human cost of agriculture

Improving job quality in agriculture is important not just for the economic viability of regional food systems, but also because agricultural work is notoriously dangerous, dirty, demeaning and devalued.

An increasing proportion of Canada’s agricultural labour — about one-quarter — is performed by migrant workers from the Temporary Foreign Worker program. These workers are tied to their employers, and often face dismissal or repatriation if something goes wrong at work. This institutionalized deportability leaves many farm workers vulnerable to exploitation.




Read more:
Canada needs to overhaul the Temporary Foreign Worker program, not just tinker with it


Agricultural work in Canada is defined by precarity, suppression and exclusion. Workers often face a lack of access to health care, unhealthy living conditions and unsafe workplaces.

This is not by chance. Farm work has historically been exempt from labour-protective laws due to a long-standing belief in agricultural exceptionalism — the idea that because it’s subject to uncontrollable factors such as weather, and contributes to national food security, agriculture should be afforded special state support and regulatory exemptions.

In practice, many believe agricultural work should not be held to the same standards as jobs in other sectors. Farm workers are often excluded from important safeguards in many jurisdictions, like overtime pay.

When combined with precarious immigration status, even the limited protections that farm workers have access to on paper may not be accessible in practice.

Why organic farmers are struggling

To better understand why some employers provide better conditions for hired farm workers, we surveyed organic farmers growing vegetables — a nutritionally important and labour-intensive industry — in British Columbia.

We asked farmers about what motivates their farming decisions, the characteristics of their farm and about their perceptions of how to improve job quality for hired workers.

We focused on organic farmers because organics are often viewed by consumers as more sustainable, and the industry has aligned itself with the value of fairness in Canada, including worker well-being. In theory, organic farmers should be among the most motivated to provide good jobs for their employees.

Despite this ethical alignment, we found that both certified and non-certified organic farms in B.C. scored poorly on most aspects of job quality that we measured, including employment and grievance procedures, paid time off and extended health benefits.

Organic farms performed better on practices related to occupational health and physical strain, such as using strategies to reduce repetitive motion for workers.

The limits of good intentions

Many farmers reported social justice-oriented motivations for job quality improvement, but they were often unable to translate these ideas into practice.

The most commonly reported barrier to improving job quality was cost, while the strongest predictor of better practices was farm economic size, measured by farm revenue and income.

In larger enterprises, investments in infrastructure and procedural improvements to labour quality can be justified because they are perceived to benefit more workers and support more complex farm operations.

However, the link between larger farms and higher job quality may belie another relationship: bigger farms are better positioned to hire workers through the Temporary Foreign Worker Program, which has specific requirements for wages and terms of employment. At the same time, the program produces power imbalances that can lead to the mistreatment and structural disempowerment of migrant workers, which is certainly bad for job quality.

Our results also suggest that the price premiums from selling food organically don’t appear to be enough to overcome the perceived financial barriers of implementing job quality measures.

A resilient and affordable food system depends on good quality jobs in agriculture. Failing to address job quality for farm workers is a missed opportunity. Many low-cost improvements to support safe and decent working conditions exist, and programs to ensure living wages for farm workers should ensure organic and ecologically produced food is affordable for all Canadians.

The Conversation

Susanna Klassen receives funding from the Social Sciences and Humanities Research Council of Canada.

Hannah Wittman receives funding from Social Sciences and Humanities Research Council of Canada.

ref. Canada’s food sovereignty depends on better jobs for farmworkers – https://theconversation.com/canadas-food-sovereignty-depends-on-better-jobs-for-farmworkers-268166

Boys do cry: The Toronto Blue Jays challenge sport’s toxic masculinity with displays of love and emotion

Source: The Conversation – Canada – By Michael Kehler, Research Professor, Masculinities Studies, School of Education, University of Calgary

In a marathon Game 7 of the 2025 World Series at the Rogers Centre, the Toronto Blue Jays fell to the Los Angeles Dodgers in 11 innings. It was a devastating finish to a series defined by unforgettable plays.

The series left fans with indelible memories of hits, runs and near-misses — unbelievable and inexplicable moments that few will forget in the years to come. But that wasn’t all the stood out.

From chants for Vladdy — first baseman Vladimir Guerrero Jr. — to calls for a “Springer Dinger” from designated hitter George Springer, fans also witnessed something deeper: the unmistakable emotional connection among these elite male athletes.

In a post-Game 7 interview, utility player Ernie Clement tearfully expressed his love for his teammates while acknowledging the emotional toll of the series.

Blue Jays discuss their World Series loss. (CTV News)

Pitcher Chris Bassitt described the bond between the team as “true love.” The sentiment echoed by many of the players was one of love, gratitude and deep friendship — qualities often reserved, if rarely expressed, among men for other men.

With the public outpouring of elation, tears and unabashed love, we are left to wonder if men’s sport culture is beginning to move beyond the toxic masculinity that has too often dominated headlines.

Rather than uphold a dominant, all-too-familiar hyper-masculine image of male athletic competitors, this years’ World Series might have opened our eyes to a counter-narrative in sport.

Masculinity and sport in Canada

Our expectations of sport culture and masculinity in Canada have largely been defined by Canada’s other national pride, hockey. Its narratives frequently valourize toughness, stoicism and physical dominance, reinforcing a narrow vision of what it means to “be a man” in sport.

Recent controversies, including Hockey Canada’s failure to address sexual assault allegations and the misuse of registration fees to settle claims, have highlighted how entrenched these norms can be.

Research shows that boys and men yearn for close male friendships. Yet in national sport, we rarely see the close intimacy, level of support and caring that were evident among the Blue Jays this year.

Men are expected to compete, not care, especially in the gladiatorial arenas of sport.

The more common, and often troubling, side of male bonding in sport has been associated with violence, aggression and locker room cases of bullying, homophobia and misogyny.

A different model of male bonding

While sport culture is often centred around competition, dominance and showmanship, interactions among the Blue Jays gave a rare glimpse at how sport culture could be different among men.

A recurring theme among all players was a genuine sense of caring for one another. “It’s not very often you get a group together that genuinely likes one another and genuinely cares about one another,” said Blue Jays manager John Schneider after Game 7.

The media and fans were drawn to what appears to be an authentically, emotionally connected group of men. Globe and Mail reporter Marcus Gee called it a “fellowship,” noting how much the players “liked each other.”

Individually and collectively, the Blue Jays were emotionally vulnerable. Gee suggested the lesson the Jays offered was “the power of unity, the power of connection, the power of love.” Whether we call it connection, love or fellowship, there is no mistake that what fans witnessed was a rare and possibly enduring lesson also about sport, masculinity and caring.

Challenging traditional masculinity

Research has shown that while boys and men are aware of the expectations for fitting in and being accepted among their peers, they also have the capacity to resist conventions of sport masculinity. Male athletes can resist the cultural norms associated with being “one of the boys.”

What we witnessed among the Blue Jays’ players was a rare public display of affection and intimacy in sport, going beyond sportsmanship, camaraderie and fellowship. The relationships, respect, friendships and love went beyond the implicit licence granted by being on the field to hug another player.

The traditional codes of masculinity when among the boys were disturbed and maybe challenged by repeated expressions of affection that men regularly avoid off the field.

The level of respect and outpouring of support along with the kindness of words signalled ways that men and boys can resist narratives of stoicism and the enduring challenge of expressing themselves.

There are indeed important lessons that sports fans might all take away along with the vivid memories of this World Series — lessons of caring among men.




Read more:
Suffering in silence: Men’s and boys’ mental health are still overlooked in sport


The power of friendship

Images of Guerrero Jr. hugging rookie pitcher Trey Yesavage, the emotional honesty of Clement and the visible love the Blue Jays have for their teammates remind us of the significance of friendships among boys and men, and the power of healthy relationships in which men care for, and about, others.

Sport culture among men and boys is historically a bastion of elite, privileged masculinities. Too often, boys and men are complicit in the lessons we learn about being accepted, about belonging among the boys, about being like the rest of the boys.

Men often fear the isolation and alienation if they do not subscribe to the rules and norms typically promoted and upheld in sport culture, echoed in chants of “man up” or “no pain, no gain.”

Perhaps one of the greatest lessons from this World Series was captured in one final image: a red-haired boy collapsed in tears with his father resting his hand on his back, considering the future, not of sport, but of a son able to cry openly, unashamedly.

The Conversation

Michael Kehler 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. Boys do cry: The Toronto Blue Jays challenge sport’s toxic masculinity with displays of love and emotion – https://theconversation.com/boys-do-cry-the-toronto-blue-jays-challenge-sports-toxic-masculinity-with-displays-of-love-and-emotion-268971

Why Bill Gates’ climate memo is being celebrated by skeptics while frustrating scientists

Source: The Conversation – Canada – By Ryan M. Katz-Rosene, Associate Professor, School of Political Studies, with Cross-Appointment to Geography, Environment and Geomatics, L’Université d’Ottawa/University of Ottawa

Shortly before COP30 talks begin in Brazil, tech billionaire and philanthropist Bill Gates has launched a “narrative grenade” into the discourse of climate politics by publishing a lengthy memo calling for a rethink of how the climate crisis is framed and addressed.

Gates calls for a “strategic pivot” in climate strategy. That appears to have hit a nerve. Both social and traditional media were ablaze with erroneous assertions about Gates’ supposed reversal of opinion on climate change.

Despite reaffirming support for ambitious decarbonization, his letter is being celebrated by climate skeptics while angering some climate scientists. United States President Donald Trump weighed in, writing: “I (WE!) just won the War on the Climate Change Hoax. Bill Gates has finally admitted that he was completely WRONG on the issue.”

This is false. Gates makes no such admission. In fact, he specifically writes that “climate change will have serious consequences — particularly for people in the poorest countries.” He emphasizes that “every tenth of a degree of heating that we prevent is hugely beneficial because a stable climate makes it easier to improve people’s lives.”

Gates goes further, calling for major investments into global health and development (particularly on vaccines), and expresses continued support for pursuing net zero carbon emissions — all of which seems to fly in the face of Trump’s climate and foreign aid agenda.

Given this, why are so many climate skeptics celebrating Gates’ letter? And why are some climate scientists frustrated, despite his steadfast support for decarbonization?

What the memo actually says

The core of Gates’ memo is a request for climate negotiators to consider “three truths:”

First, that they consider climate change a “serious problem” but not the inevitable “end of civilization.”

Second, that temperature targets like the 2015 Paris Agreement’s focus on limiting warming below 2 C are not the best goalposts for measuring progress on climate change.

And third, that the best way to defend humanity against climate change is to pursue global health and economic prosperity.

The centrepiece of Gates’ analysis is the claim that technological innovations — like electric vehicles, renewable energy and battery storage —have already started to reduce the carbon intensity of global economic activity and that new, more consequential innovations in the future will be driven by economic development and healthy societies.

He provides as evidence changes in the International Energy Agency’s (IEA) carbon dioxide emissions forecasts — pointing out that a 2014 IEA projection expected significant growth in emissions, while a 2024 projection now sees significant reductions (though some commentators have contested Gates’ interpretation on this specific point).

Gates wants readers to know progress is being made on climate change thanks to growth and technological innovation, and as such, the “worst-case scenarios” are no longer plausible.

Why climate skeptics see this as a win

It is Gates’ initial framing — that climate change is “not the end of the world” — that seems to have resonated most strongly with climate skeptics. The memo begins by critiquing the “doomsday view” that “cataclysmic climate change will decimate civilization.” Instead, he argues that “people will be able to live and thrive in most places on Earth for the foreseeable future.”

From that point, climate contrarians seized on the memo. One of the largest conspiracy accounts on X falsely declared that “today Bill Gates admitted himself that Climate Change is all a lie.” Others followed suit.

Even media outlets contributed to the confusion, with Futurism running an article with the deeply misleading headline “Bill Gates Says Climate Change Isn’t So Bad After All.”

This reaction is not surprising. The claim that climate change is not a civilization-ending threat aligns closely with long-standing skeptic rhetoric that mainstream climate science relies on fear to justify politically motivated change.

Research shows that climate skeptics interpret the issue through black-and-white thinking, where cognitive binaries are used to help simplify complex systems.

Within this world view, if climate change is not apocalyptic, then it can be dismissed as exaggerated, and by extension, climate policy is unnecessary, or worse, a cover for social control.

Why some climate scientists are frustrated

The idea that climate change will not literally end civilization is not new — even for Gates. In my own work on the growth-environment debate, I’ve shown how dominant sustainability discourses have long rested on the assumption that even the most pressing environmental problems can be managed, and that economic growth and technological innovation are the best means of addressing them.

For some climate scientists, however, Gates’ memo places too much emphasis on technology — especially exploratory and high-risk technologies like small modular reactors, carbon capture and storage, and geoengineering.

The worry, as climate scientist Michael Mann expressed in reference to the Gates memo, is that this focus on “technofixes for the climate … leads us down a dangerous road,” because such approaches can distract from proven mitigation strategies and provide cover for continued business-as-usual burning of fossil fuels.

Other climate scientists found the memo downplayed the severity of global warming seen to date, not least the warming expected by the end of this century (which, in Gates’ telling could be up to +2.9 C above the pre-industrial era).

For instance, scientist Daniel Swain noted his “dismay and deep frustration” about the framing in Gates’ memo (despite agreeing with some of its central claims), precisely for glossing over the known harms and systemic risks that lie ahead. Swain invoked the late environmental studies professor Stephen Schneider’s reminder that when it comes to global warming, “the end of the world” and “good for humanity” are the two lowest-probability outcomes.

What now?

Like a dazed battlefield after a grenade is detonated, the terrain of climate politics has been unsettled by Gates’ missive, but it is not altogether transformed. The debate will continue. Skeptics will likely add screenshots of misleading headlines about Gates’ “admission” to their repertoire of doubt-casting memes.

Climate scientists, meanwhile, will continue to grapple with the difficult task of communicating climate risk, urgency and uncertainty, in a political environment that is not well-suited to nuance and complexity.

The memo does not change the science. But it does reveal how sensitive climate politics is to framing, and how the same message can become ammunition for very different projects.

The Conversation

Ryan M. Katz-Rosene was the recipient of an Insight grant from the Social Sciences and Humanities Research Council of Canada to study discourses of the growth-environment debate.

ref. Why Bill Gates’ climate memo is being celebrated by skeptics while frustrating scientists – https://theconversation.com/why-bill-gates-climate-memo-is-being-celebrated-by-skeptics-while-frustrating-scientists-268940

How organised crime took over areas of Rio de Janeiro – and why violent police raids won’t fix the problem

Source: The Conversation – UK – By Gemma Ware, Host, The Conversation Weekly Podcast, The Conversation

At dawn on October 28, residents of Rio de Janeiro woke to the sound of gunfire. Battles continued throughout the day in the favelas of Alemão and Penha, as police mounted a huge operation targeting the Commando Vermelho, or the Red Command, one of Brazil’s largest organised criminal gangs.

In the days that followed, as graphic images showed lines of bodies on the streets, it emerged that at least 115 civilians and four police officers had been killed, making it the most violent police operation in Brazilian history.

A poll carried out two days after the raid indicated that 62% of Rio residents supported the raid – rising to 88% in the favelas. But there were also protests against alleged extrajudicial killings and condemnation by the UN and other human rights organisations.

The violent operation overshadowed the start of the Cop30 climate summit in Belem on the edge of the Amazon. At a press conference upon his arrival in Belem, Brazil’s President Luiz Inácio Lula da Silva, who was not aware of the operation beforehand, condemned the raid as “diastrous” and a “mass killing”.

In this episode of The Conversation Weekly podcast, we speak to Robert Muggah, founder of the Institute Igarapé and a research collaborator at the Brazil LAB at Princeton University, about how organised crime become so deeply embedded in Brazil – and if there’s a better way to confront it.

The origins of the Red Command lie in Brazilian prisons during the years of Brazil’s military dictatorship in the 1970s. “ The authorities at the time often would crowd common criminals together with left-wing political prisoners in the same jails,” explains Muggah. “ You had this almost metastasis happening between these different inmates and … an alliance emerged from these two groups called the falange vermelha, which means the red phalanx.”

Incubated in the prison system, the gang moved out in the street, shedding its left-wing ties as the dictatorship ended. “By the 1980s, you have a fairly well-organised group which is diversifying its income streams from what was typically bank robberies or targeted raids, to the cocaine economy,” Muggah says.

Today, the Red Command has expanded out of Rio and is present across Brazil and in neighbouring countries. “What you’ve seen over the past decade in particular is the penetration of organized crime, not into just new geographic areas, but entirely new sectors of the economy,” says Muggah.

Listen to the interview with Robert Muggah on The Conversation Weekly podcast, and read an article he wrote in Portuguese on the October 28 operation against the Red Command.

This episode of The Conversation Weekly was written and produced by Katie Flood, Mend Mariwany and Gemma Ware. Mixing by Eleanor Brezzi and theme music by Neeta Sarl.

Newsclips from AlJazeera English, Guardian News, DRM News, Itatiaia Patrulha, AFP Portuguese, Cross World News and NewsX World.

Listen to The Conversation Weekly via any of the apps listed above, download it directly via our RSS feed or find out how else to listen here. A transcript of this episode is available on Apple Podcasts or Spotify.

The Conversation

Robert Muggah is the co-founder of the Igarape Institute, a think and do tank in Brazil and a principal and co-founder of SecDev, a geopolitical and digital advisory group.

ref. How organised crime took over areas of Rio de Janeiro – and why violent police raids won’t fix the problem – https://theconversation.com/how-organised-crime-took-over-areas-of-rio-de-janeiro-and-why-violent-police-raids-wont-fix-the-problem-269117

The comedy economy: Nigeria’s online video skits are making millions

Source: The Conversation – Africa – By Nnamdi O. Madichie, Professor of Marketing & Entrepreneurship, Unizik Business School, Nnamdi Azikiwe University

Short comedy videos circulating on social media have created a booming industry in Nigeria in the past few years. The country’s comedy creators put their skits out on platforms like YouTube, TikTok and Instagram to reach a massive audience.

As these online comedians gain followers they make their money from advertising, by endorsing brands as influencers, and through collaborations. In Nigeria the industry is popularly called the skit economy.

This phenomenon represents more than a major new entertainment trend. It highlights the ingenuity of young Nigerians in using technology to create livelihoods and influence culture. In the process, they contribute to national economic growth.

The skit industry has joined the likes of Nollywood film, Afrobeats music and local fashion to put the country on the entertainment map globally.

The rise of the industry is chronicled in the 2024 book Skit Economy: How Nigeria’s Comedy Skit-Makers Are Redefining Africa’s Digital Content Landscape, by entrepreneurship scholar and polling guru Bell Ihua. His work is supported by findings from the Africa Polling Institute.

As he explains:

The Nigerian entertainment industry is undoubtedly creating job opportunities and contributing to the country’s diversification from oil … The industry is rated as the second most significant employer of youths in Nigeria after agriculture, employing over one million people.

According to his book, skit-making is estimated to be Nigeria’s third largest entertainment industry sector, with a net worth of over US$31 million.

As a marketing scholar focusing on the cultural and creative industries and digital entrepreneurship who has had the privilege of interviewing Ihua, I’d like to share my thoughts about his book.

What becomes clear as you read it is that social media platforms have not only amplified the reach and impact of skits. Online platforms have allowed creators to reach global audiences while preserving the culture, language and stories unique to their communities. Skit creators prove the potential of comedy as a medium for both entertainment and cultural diplomacy.

However, as the industry grows, argues Ihua, the skit economy must navigate new challenges related to representation and ethics.

What’s in the book

The book’s eight chapters cover Africa’s digital content landscape, taking into account the continent’s youth bulge and the evolution of social media and content creation.

Ihua then explores Nigeria’s booming cultural and creative industries before homing in on comedy skit-making in chapter 4. It attempts to classify various types of digital content creation in Nigeria and outline the trends in online videos before embarking on an in-depth national study on comedy skit-making in chapter 7. He then considers implications for public policy and future research in the field.

What makes the book so compelling is that it recognises skit-making as an ecosystem on its own terms. It then defines what that ecosystem looks like in Nigeria. In the process Ihua makes it clear why books like this matter.

They are a call for taking entertainment seriously and investing future research in it. Social media and digital technology have reconfigured an unsung economic sector that’s capable of including the bulging youth population in the national conversation. This is despite limited institutional support.

What’s driving the boom

Ihua traces its boom to COVID-19 lockdowns that began in Nigeria in 2020:

They provided a source of laughter and relief to many Nigerians, as most people found it safer to stay at home and get entertained with skits.

Today, writes Ihua, two-thirds of Nigerians watch comedy skits frequently. According to his study they serve as stress relief and social commentary.

With 63% of Nigerians under 25 and high social media uptake, skit-making taps into abundant creative energy and mobile-first audiences.

Value

The Skit-Economy highlights how skit comedians create direct and indirect jobs (editors, social media managers, brand consultants). They generate income through endorsements, platform monetisation (the revenue they get from advertising on a space like YouTube), and various partnerships and collaborations.




Read more:
Detty December started as a Nigerian cultural moment. Now it’s spreading across the continent – and minting money


Their cultural value is not just measured in their global influence. Skits reflect everyday Nigerian realities with humour and satire, influencing local public opinion and reinforcing national identity.

As prominent Nigerian entrepreneur and cultural worker Obi Asika notes in the book’s foreword:

Their success … stems from a combination of talent, creativity, innovation, an entrepreneurial spirit, and a deep understanding of their audience’s preferences and cultural nuances.

Challenges

However, Ihua identifies a number of challenges facing the industry.

Financial rewards are unequal. Only top creators earn sustainably. For many skit-makers revenue is unstable.

Working from Nigeria means dealing with infrastructure deficits. Electricity supply is unreliable, the internet is expensive and there is limited access to digital production tools.




Read more:
Nigerian TikTok star Charity Ekezie uses hilarious skits to dispel ignorance about Africa


Nigerian skit-makers also operate in a climate where there are weak intellectual property protections. Piracy and unauthorised reuse undermine earnings.

The job can be an ethical minefield. Pranks can be harmful. They can perpetuate stereotypes and be insensitive to minorities.

These challenges are enhanced by a policy vacuum. There is little government recognition or support for digital creatives in Nigeria.

An African future?

For Ihua, skit-making is a good example of how new digital industries can aid in absorbing Africa’s growing youth workforce. With adequate support, skit-making can help provide dignified livelihoods.

So, for Ihua these creators are not merely entertainers. They’re also job creators, cultural ambassadors, and catalysts of digital transformation.

For Africa broadly, the rise of skit-making underscores the continent’s potential to innovate in ways that are uniquely aligned with its youthful demographics and digital future.

Nigeria’s skit economy offers a blueprint for the continent. Already, skit-making is spreading to other countries, like Ghana, Kenya and South Africa. The lines are blurring between stand-up or TV comedians and skit makers.

If nurtured with the right infrastructure, policy, and industry support, the skit economy could evolve from an informal hustle into a structured pillar of Africa’s creative economy. This could further solidify the continent’s role in the global cultural imagination.

The Conversation

Nnamdi O. Madichie 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. The comedy economy: Nigeria’s online video skits are making millions – https://theconversation.com/the-comedy-economy-nigerias-online-video-skits-are-making-millions-267784

African poetry is celebrated in a groundbreaking publishing project

Source: The Conversation – Africa – By Tinashe Mushakavanhu, Assistant Professor, Harvard University

For 10 years, Ghanaian poet Kwame Dawes and his friend the Nigerian writer Chris Abani have sifted through piles of manuscripts looking for Africa’s new poetic talent. Since 2014, the African Poetry Book Fund has been assembling a formidable archive of writing through the New Generation African Poets Chapbook Series.

A chapbook – a small publication usually under 40 pages – is an accessible and honoured format for poets to publish focused selections of their work. In this series, each chapbook features an emerging African poet, and is presented as part of a beautifully designed box set of 10 or more chapbooks. Besides the poetry itself, each box set also showcases the work of a commissioned African visual artist. The artists include Sokari Douglas Camp, Victor Ehikhamenor, Ficre Ghebreyesus and Aida Muluneh, among others.

This ever-growing archive has now published over 100 poets, and offers a window into the diversity of African poetic expression today.

Marking the project’s 10th anniversary is a new anthology called Toward a Living Archive of African Poetry, edited by Jordanian writer Siwar Masannat. It collects Dawes and Abani’s rich introductions to each box set and has a foreword by Masannat. In it, readers learn about the impact of the series, offering a layered and necessary account of how these chapbooks have transformed the visibility of African poets over the past decade.

My work as a scholar of African literature focuses on recovering overlooked histories and interrogating the spaces in which literature is made and circulated.

This new anthology matters because it documents not just poems, but a cultural movement that redefines what an African literary archive can be, and why poetry remains central to that conversation.

Decidedly diasporic

While the series places Africa at the centre of its imagination, its focus is largely diasporic, shaped by Africans living outside the continent. The majority of the poets live in the US or the UK. Poets based on the continent form a minority and are scattered geographically.

The editors acknowledge this imbalance, attributing it to “better access to workshops and craft education” available to diaspora poets. The result is an archive arguably shaped less by the immediacies of the continent and more by the diaspora’s sensibilities and infrastructures.

Nigeria, more than any of the 25-odd countries included in the chapbooks, shapes the aesthetics of the series. This reflects both the density of the country’s literary networks and the curatorial choices of the editors. They rely heavily on personal connections and prize pools to spot new and emerging talents.

A recurring feature of the poets in the series is the “hyphenated African”: Somali-American, Ghanaian-British, Ethiopian-German, Sierra Leonean-American. Some were born in countries outside Africa or migrated as toddlers. Their Africanness is claimed through memory, nostalgia, heritage, or family history, rather than geography.

The editors assert that all the poets “self-identify as Africans in the full and complicated way that Africanness is best defined”. This also underscores how the project expands the category of African poetry.
In fact, the transcontinental profile of these writers shows how African poetry today cannot be read solely through a nationalist lens. The hybridity of identity and place becomes central. Many poets occupy in-between spaces – culturally, geographically, linguistically and emotionally.

Still, the series impresses on many other levels. Particularly in its commitment to highlighting the continent’s plural and localised poetics, and in its rare, long-term investment in the future of African poetry.

Gender

The series has been notably attentive to gender parity. Women poets like Warsan Shire, Safia Elhillo, Victoria Adukwei Bulley, Momtaza Mehri, Tsitsi Jaji and Vuyelwa Maluleke, among others, form a significant portion of the archive.




Read more:
Tutu Puoane: the South African singer on creating her new album out of Lebo Mashile’s poetry


This signals an important feminist turn in African poetics. The chapbook form becomes a space where African women’s voices are nurtured and given international circulation, countering historical silences. The poets here highlight a generational continuity of feminist expression.

Intergenerational

The birth years of poets in the series range from 1963 to 2007, showcasing a vibrant intergenerational dialogue. The older poets often engage in socio-political critique informed by post-independence transitions. Millennial and Gen Z poets frequently explore themes of identity, queerness, internet culture, displacement and decoloniality with linguistic experimentation and digital fluency.

Ghanaian poet Tryphena Yeboah, in her chapbook, A Mouthful of Home, exemplifies this:

I TELL MY MOTHER I WANT A BODY THAT

EXPANDS

Into a map. She wants to know where I’ll travel to. I say

“myself”.

The act of travel becomes a metaphor for self-mapping that captures how younger African poets reimagine movement, belonging and home as internal, affective geographies.

In contrast, South African poet Ashley Makue, in her chapbook, i know how to fix myself, offers a more visceral expression of embodied trauma and inherited violence:

my mother is a war zone

they don’t tell her that

these men that pee in her

and leave with gunpowder in their chests

Living archive

The New Generation African Poets Chapbook Series has been an extraordinary intervention in the history of African poetry. It has foregrounded a generation, opened an aesthetic safe space, and created a beautiful, living archive.

Dawes and Abani introduce each of the box sets with two introductions – what they call “simultaneous conversations” – and they often debate identity, the style of the poetry, circulation, and other issues.

This is more than an impressive catalogue; it is a breathing archive of African poetic consciousness, one that resists static definitions. It captures the fluidity of identity, the urgency of voice, and the diverse shaping of African poetry today.

What it tells us: that African poetry is thriving, diverse and globally mobile. What it does not tell us: how poets working entirely from the continent might imagine and enact African poetics differently.

But by foregrounding new and emerging voices, the Africa Poetry Book Fund affirms that poets remain vital chroniclers of the African experience, articulating emotion, history and imagination in ways that other forms of writing often cannot.

They don’t just do this through publications, but running prizes, supporting African poetry libraries and maintaining a digital archive.

The Conversation

Tinashe Mushakavanhu 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. African poetry is celebrated in a groundbreaking publishing project – https://theconversation.com/african-poetry-is-celebrated-in-a-groundbreaking-publishing-project-267772

Access to water has a long racial history in Durban: I followed the story in the city’s archives

Source: The Conversation – Africa (2) – By Kristin Brig, Lecturer in Public Health & Society, Washington University in St. Louis

The water infrastructure politics of eThekwini, the municipality that includes the city of Durban, have been splashed across the digital pages of South Africa’s news outlets in recent years.

They’ve covered the 2022 floods that damaged kilometres of pipes, water tanker purchases as a response to increasing water scarcity, and the disconnection of residential water storage tanks from municipal pipes to cope with leaky infrastructure. Like other South African municipalities, eThekwini has fallen behind on maintaining its piped water infrastructure and has looked to stopgap solutions.

The city’s water politics has a long history. Some of the infrastructure issues can be traced back to the mid-1800s, when it was a British imperial port.

I’m a historian with an interest in coastal communities and urban life. As part of my work on water as a public health concern in colonial cities, I spent months in the Durban Archives Repository, going through correspondence, reports, business contracts, newspaper clippings and town council minutes.

The records revealed how the system of colonial-era water infrastructure worked – and for whom.

The first water technologies in Durban were British-styled wells. Anyone could use them, for free. They brought people of different origins and class together for practical purposes but also created anxiety about social difference. For colonial officials, the public had to follow British standards or lose access to the infrastructure altogether. They created Durban’s first water-policing system, purportedly for better public health and conservation. While wealthier and white people eventually came to rely on piped water, poorer and black (Zulu and Indian) people were excluded.

This system formed the basis for the uneven access to water that today’s residents experience. People still depend on private water infrastructure as the municipal system struggles.

Nineteenth-century infrastructure

Founded by British traders as Port Natal in 1824, the colonial borough of Durban depended on stand-alone water infrastructures from the beginning. Brick and cement wells were the first technologies from which residents drew water, since they were easy to build and maintain. Most wells had either a bucket or a pump attached to them. Pumps attached to wells became common after the borough made most wells publicly available in the mid-1850s.

Water tanks, on the other hand, were private technologies which mainly lay underground. Only wealthier households and businesses could afford to build them. They became prominent in the 1870s.

It’s hard to know exactly how many of these infrastructures existed in total. By the 1870s, though, official reports indicate that about 18 public wells and pumps across the town served the bulk of the town’s approximately 20,000 inhabitants.

Piped water came to Durban in the 1880s, supplied initially by the spring at Curries Fountain. In 1889, the city’s laws were extended to cover private tanks that were filled from the municipal pipes. Even so, much of the population still relied on standalone infrastructures for water supplies.

As time went by, conflicts began to brew. The rising population placed a strain on these stand-alone infrastructures, which offered varying amounts of water depending on rainfall patterns. Arguments sparked when a community drew too much water or polluted a well, creating a local water scarcity.

Clashes and restrictions

White colonists blamed much of the water scarcity and contamination on African labourers who worked as household or business servants, sanitary workers and launderers. These positions demanded a close relationship with fresh water collection and use, which meant African labourers became the main users of wells, pumps and tanks.

Labourers did not always use water technologies according to colonial expectations, however. Local people were accustomed to using open water sources like rivers and streams, not restrictive iron and brick infrastructures. So, they modified their traditional work at open sources, like washing objects and produce, to the new technologies they had to use.

That sometimes created problems, according to the archive records. They accidentally broke handles and chains when pumping too quickly. They drew water from tanks without using a filter, which was officially perceived as a disease risk. They publicly washed clothing, bodies and food at wells, where the dirty wash water flowed back into the enclosed water supply.

Colonists exploited this situation to place restrictions on how labourers could use stand-alone water infrastructures. Borough officials crafted new laws that forced colonised residents to conform with British standards. They punished those who did not comply with fines, verbal lashings and even jail time.

Durban was part of a colonial system predicated on white supremacy. The government sought to maintain segregation between white colonists and African and South Asian residents. So, it imbued its water technology regulations with the notion that some water management actions – British – were “healthier” than others, namely African and South Asian. If someone used a technology contrary to British standards, then they faced restricted access to public technologies and the water they provided.

Water system legacy

Stand-alone water infrastructures still exist across eThekwini. Many residents of informal settlements and formerly racially segregated areas remain officially unconnected with municipal pipes. They instead depend on local wells, pumps and illegal individualised connections. An increasing number of households are investing in water tanks as the municipal water system becomes more unreliable.




Read more:
The lack of water in South Africa is the result of a long history of injustice – and legislation should start there


Things have, of course, changed since the 19th century. However, the municipality continues to require residents to use these technologies within regulatory boundaries if residents want to maintain access to them. Cutting off municipal water supply to private storage tanks is an example.

Infrastructural stopgaps further expose a water system that was never meant to supply every resident equitably and without restriction. These actions tell us that today’s officials have inherited and inadvertently continue a water system that was meant to exclude more than include, to punish more than teach, to restrict more than provide.

The Conversation

Kristin Brig receives funding from the US Fulbright Program, the US National Science Foundation (NSF), and Johns Hopkins University.

ref. Access to water has a long racial history in Durban: I followed the story in the city’s archives – https://theconversation.com/access-to-water-has-a-long-racial-history-in-durban-i-followed-the-story-in-the-citys-archives-267302

Canadian immigration policy has become a moving target

Source: The Conversation – Canada – By Omid Asayesh, Postdoctoral fellow, Sociology, University of Calgary

With more than 85 million people naming it their top choice, Canada has become one of the most desired migration destinations in the world over the past decade.

Yet even in 2024, its highest year on record, Canada only admitted about 480,000 new permanent residents, a small fraction of global demand.

Despite earlier plans to increase admissions, the intake is now set to decline in response to mounting pressures on housing and public services. There’s also been political pushback from opposition parties and segments of the public who argue that the government’s rapid expansion of immigration targets has outpaced Canada’s ability to absorb newcomers.

The challenge, however, is not how few people get in; it is how unpredictable the system has become.

a graphs shows admissions of permanent residents from 1980 to 2027
Admissions of permanent residents by year (1980-2027)
(Immigration, Refugees and Citizenship Canada)

A shifting framework

In June 2022, the federal government amended the Immigration and Refugee Protection Act to give itself more flexibility.

It rolled out a new immigration stream to prioritize in-demand occupations in health care, engineering and agriculture, as well as French-speaking applicants.

In the earlier system, fixed points for education and high-skilled work experience provided applicants with a clear way to assess their eligibility. In contrast, the new category-based approach relies on occupational needs that shift rapidly.

The goal was to respond quickly to labour shortages and economic goals by consulting with provinces, industries, labour groups and the public. However, this category-based selection has been rolled out with little consistency or transparency. Announcements come with no clear timelines, fixed numbers or indication of when a stream might close.

In this new framework, broad categories such as health care or STEM (science, technology, engineering and mathematics) encompass hundreds of distinct occupations. Yet the government may single out only a handful of these occupations for invitations while excluding the rest, which makes outcomes unpredictable even within the announced priority categories.

Migration is a long-term project

What this changing immigration policy fails to consider is that immigration is not an instant decision, but a long-term project.

My research shows that people may spend more than a decade preparing for migration by carefully choosing a field of study, seeking related work experience, saving aggressively and even reshaping their personal lives. Some even avoid intimate relationships or postpone having children in hopes of migrating. However, those plans fall apart when the qualifying requirements change quickly.

The uncertainty created by shifting immigration policies is not felt only abroad. Within Canada, roughly three million people are on temporary permits, and many of them are hoping for a chance at permanent residency. They spend years establishing roots in their communities, with the belief that it will ultimately lead to a more secure future. But when policy priorities change unexpectedly, their lives are thrown into limbo.

International students are a clear example. Many spend tens of thousands of dollars on tuition, averaging $41,746 for international undergraduates in 2025–26, encouraged by the promise that a Canadian education will improve their chances of staying.

Yet, as the rules change, they may find themselves with no option to stay in Canada once their studies end. Similarly, temporary foreign workers may fill urgent labour shortages, only to see pathways to permanence narrow or close before they can apply.

A problem for everyone

Quick and unpredictable changes in rules make immigration seem like a lottery rather than a structured system. Success now often depends not on careful planning or merit, but on being in the right place at the right time.

The lottery effect erodes confidence in Canada’s immigration policy. It conveys the idea that long-term planning and investment might not be essential and that today’s standards might change tomorrow.

Uncertainty also fuels a darker consequence: fraud.

When pathways open and close overnight, some people take shortcuts by fabricating credentials, work experience or job offers that match the latest requirements.

These patterns of instability and deception pose significant concerns for a nation that relies on immigration to maintain its labour force, economy and demographic balance. At the same time, immigration has become increasingly politicized in recent years.

Consequently, the political climate has shifted toward risk-averse immigration policies that focus on immediate results instead of developing sustainable approaches.

A more sustainable system

Immigration is essential to Canada’s future because it sustains the workforce as the population ages, with nearly all of Canada’s labour force growth now coming from newcomers.

Despite myths about migration, economic immigrants generally contribute more in taxes than they consume in public services over the long term. Additionally, immigrants start businesses at higher rates, bring diverse skills and perspectives and establish global connections that drive innovation and long-term economic growth.

However, many newcomers struggle to find employment in their designated fields due to barriers such as credential recognition or social integration.

Meanwhile, many temporary residents who have studied, worked in highly skilled jobs and paid taxes for years are ineligible to apply for permanent status because their occupations are not on the list. They end up leaving despite their contributions.

The immigration system should include defined criteria, realistic deadlines and transparent information that lets people inside and outside Canada plan with confidence. Consistency is crucial.

A more sustainable approach would connect permanent residency more closely to proven success in the Canadian labour market. At the end of the day, immigration should be based on preparation, abilities and dedication — certainly not on luck.

The Conversation

Omid Asayesh 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. Canadian immigration policy has become a moving target – https://theconversation.com/canadian-immigration-policy-has-become-a-moving-target-264100

Brewery waste can be repurposed to make nanoparticles that can fight bacteria

Source: The Conversation – USA – By Alcina Johnson Sudagar, Research Scientist in Chemistry, Washington University in St. Louis

Some compounds in waste produced in the brewing process could be repurposed for antibacterial drugs. Iuri Gagarin/iStock via Getty Images

Modern beer production is a US$117 billion business in the United States, with brewers producing over 170 million barrels of beer per year. The brewing process is time- and energy-intensive, and each step generates large amounts of waste.

Solid components such as used grains and yeast from this waste end up in landfills, where harmful compounds can leach into the soil. Brewing wastewater that makes it into aquatic ecosystems can contaminate streams and lakes, decrease oxygen levels in those environments and threaten organisms.

To keep this waste from going into the environment, scientists like me are exploring how to manufacture beer brewing waste into useful products. I’m a chemist, and my research team and I are interested in figuring out how to recycle and repurpose brewery waste into tiny particles that can be used to make new types of prescription drugs.

The brewing process

The brewing process takes raw cereal grain – usually from barley – and converts its starch and proteins into simpler chemicals by malting. Brewers initiate this process by adding water, which wakes the seed from dormancy, and then keeping the seeds at a controlled temperature to sprout the grain.

During this time, important enzymes are released that can convert the starch and proteins in the grains to fermentable sugars and amino acids. They then heat up the resulting product, called the malt, to dry it out and stop further sprouting. After this malting process, they add hot water and mash the malt to release the compounds that give the beer its iconic flavor.

A diagram showing the stages of beer brewing -- and flagging four sources of waste: brewer's spent grains, hot trub, brewer's spent yeast and filtrate.
The brewing process produces waste at four main stages.
Alcina Johnson Sudagar, CC BY-SA

The brewers then separate the sweet malt extract, called wort, and the leftover solid is removed as waste, called brewer’s spent grains. About 30% of the weight of the raw grain ends up as spent grain waste. This waste is either used as animal feed or discarded. About 30 million tons of spent grain is generated annually.

Brewers add a cone-shaped flower of the Humulus lupulus plant, called hops, to the wort, then boil and clarify it. The hops flower is the key ingredient that gives beer its bitterness and aroma. The undissolved hops and proteins get collected during clarification to form hot trub, the second major waste from breweries. Roughly 85% of the hops are removed as waste material.

The clear wort is then cooled and fermented by adding yeast. The yeast filtered out after fermentation, called brewer’s spent yeast, forms the third type of waste that breweries generate. The spent yeast is one of the major byproducts of the brewing industry. This waste has a large quantity of water and solid material: 100 liters of beer generate 2 to 4 kilograms (4.4 to 8.8 lbs.) of spent yeast.

Finally, the fermented beer is filtered before entering the production line, where the beer is bottled for consumption. The wastewater generated at this last stage forms the filtration waste. A medium-size brewery generates about 8 tons of dense sludge and five to seven times – or 40 to 56 tons – of wastewater as filtration waste monthly. Several tons of waste from breweries remain largely underused due to their low economic value.

The brewery waste problem

These wastes have several compounds, such as carbohydrates, proteins, amino acids, minerals and vitamins that can potentially be repurposed. Scientists have tried to reuse the wastes in creative ways by creating biofuels and vegan leather using either some compounds extracted from the waste or the entire waste.

Breweries can send their solid wastes to farms that repurpose it as soil fertilizer, compost or animal feed, but a major fraction of it industrywide is discarded as landfill. The wastewater is discharged into the sewage lines, which can challenge sewage treatment systems, as they contain more than 30 times higher pollutants than the typical residential sewage.

Although breweries are becoming more aware of their waste and moving toward sustainable approaches, demand for beer has continued to rise, and a large amount of waste remains to be dealt with.

Repurposing waste in nanoparticles

In my research, I’m interested in determining whether compounds from brewery waste can help create nanoparticles that are compatible with human cells but fight against bacteria. Nanoparticles are extremely tiny particles that have sizes in the range of one-billionth of a meter.

A size scale going as small as 0.1 nm, the size of a molecule, up to 1 m, the size of a guitar. Nanoparticles are between 1 and 100 nm.
Nanoparticles are smaller than bacteria – they can be the size of viruses or even human DNA.
Alcina Johnson Sudagar, CC BY-SA

In medicine, when the same antibiotics are used over and over, bacteria can evolve resistance against them. One potential use of nanoparticles is as an active component in certain antibiotic drugs. These nanoparticles could also work as disinfectants and cleaning chemicals.

My team and I developed nanoparticles coated with some of the compounds found in brewery waste – an invention which we have since patented but are not actively commercializing. We created the particles by adding waste from any stage of brewing to a metal source.

When we added a chemical containing silver – for example, silver nitrate – to the waste, a combination of processes converted silver compound into nanoparticles. One process is called reduction: Here, compounds found in the brewery waste undergo a chemical reaction that converts the silver ions from the silver nitrate to a metallic nanoparticle.

The other process, called precipitation, is similar to how chalky soap scum forms in your sink when soap reacts with minerals such as calcium in hard water. Oxide and phosphate from the brewery waste combine with a silver ion from the silver nitrate, causing the silver to form a solid compound that makes up the nanoparticle’s core.

The organic compounds from the brewing waste such as proteins, carbohydrates, polyphenols and sugars form a coating on the nanoparticles. This coating prevents any other reaction from happening on the surface of these particles, which is very important for making the nanoparticles stable for their applications. These nanoparticles prepared from brewery waste were made of three components: silver metal, silver oxide and silver phosphate.

The steps involved in the creation of green nanoparticles using brewery wastes from different stages of brewing
Nanoparticles preparation using one-pot method.
Alcina Johnson Sudagar, CC BY-SA

Environmentally friendly processes that reduce the use of hazardous chemicals and minimize harmful side products are known as green chemistry. Because our procedure was so simple and did not use any other chemicals, it falls into this green chemistry category.

Nanoparticle safety

My colleague Neha Rangam found that the coating formed by the brewery waste compounds makes these nanoparticles nontoxic to human cells in the lab. However, the silver from these nanoparticles killed Escherichia coli, a common bacterium responsible for intestinal illness around the world.

We found that a special type of nanoparticle containing high amounts of silver phosphate worked against E. coli. It appeared that this silver phosphate nanoparticle had a thinner coating of the organic compounds from the brewery waste than silver metal and oxides, which led to better contact with the bacteria. That meant enough silver could reach the bacteria to disrupt its cellular structure. Silver has long been known to have an antimicrobial effect. By creating nanoparticles from silver, we get lots of surface area available for eliminating bacteria.

Several nanoparticles have been in clinical trials and some have been FDA approved for use in drugs for pain management, dental treatment and diseases such as cancer and COVID-19. Most research into nanoparticles in biotechnology has dealt with carbon-based nanoparticles. Scientists still need to see how these metal nanoparticles would interact with the human body and whether they could potentially cause other health problems.

Because they’re so tiny, these particles are difficult to remove from the body unless they are attached to drug carriers designed to transport the nanoparticles safely. Before doctors can use these nanoparticles as antibacterial drugs, scientists will need to study the fate of these materials once they enter the body.

Some engineered nanoparticles can be toxic to living organisms, so research will need to address whether these brewery waste-derived nanoparticles are safe for the human body before they’re used as a new antibacterial drug component.

The Conversation

Alcina Johnson Sudagar received funding from the European Union’s Marie Curie Horizon 2020 program for this work. Part of the work has been patented, Polish patent valid since August 2020 (Patent no: P.435084)

ref. Brewery waste can be repurposed to make nanoparticles that can fight bacteria – https://theconversation.com/brewery-waste-can-be-repurposed-to-make-nanoparticles-that-can-fight-bacteria-264847