Category: English

Source: The Conversation – UK – By Majdi Faleh, Academic Fellow & Lecturer in Architecture and Cultural Heritage, Nottingham Trent University

Nestled in the southern Mediterranean, off the south-east coast of Tunisia, lies the island of Djerba. With a rich cultural and religious history, it has been a crossroad of many civilisations, including the Phoenicians, Romans, Byzantines and Arabs, and is home to many unique architectural sites. These include the Sedouikech underground mosque, St Joseph’s Church and the El Ghriba Synagogue.

But, for many years, Djerba’s cultural heritage has been in danger. This is due to a combination of over-tourism, environmental change and human neglect.

By the 1990s to early 2000s, when Djerba was at the height of its popularity, the island was attracting between 1 million and 1.5 million visitors each year. It is one of Tunisia’s most popular tourist areas, with more hotels than any other destination in the country.

Tourism has resulted in excessive tourist traffic in Djerba, particularly during the summer. It has also contributed to other problems such as water stress and waste generation. According to figures from 2020, hotels alone generate between 35% and 40% of all the waste on the island.

But the development of tourism has, above all, altered Djerba’s cultural landscape. In some areas of the island, Djerba’s traditional housing – houmas, menzels and houchs – have given way to more modern tourist infrastructure.

This has accelerated since Tunisia’s 2011 revolution, when long-time dictator Zine El Abidine Ben Ali was ousted. Weak institutional oversight has led to vandalism, illegal construction on archaeological sites and unauthorised demolitions.

The development of tourism on Djerba has also eroded traditional ways of life. The island has experienced significant changes due to tourism, with the development of roads, ferries, an airport and the internet leading to a decline in traditional activity. Livelihoods like agriculture, fishing and artisanal crafts have declined and are often now showcased only in tourist areas.

Climate change has worsened Djerba’s problems. Rainfall patterns have changed across the island over recent decades, with models suggesting that annual precipitation rates could drop 20% by the end of the century. More frequent and prolonged droughts are expected.

At the same time, rising sea levels and increasingly common storm surges are affecting the island. Research from 2022 found that 14% of Djerba’s beaches are now highly vulnerable to submersion and coastal erosion.

Several historical monuments on Djerba have already experienced periodic flooding and saltwater intrusion. The ruins of Sidi Garous and the shrine of Sidi Bakour are now entirely underwater and have been replaced by memorials.

Other archaeological sites located near the coast like Haribus, Meninx, Ghizene and Edzira, some of which date back to the Roman era (eighth century BC to fifth century AD), are now partially or fully submerged. Studies by Tunisia’s National Institute of Heritage suggest that many of these sites have been lost permanently to the encroaching sea.

World heritage site

Significant portions of Djerba’s cultural heritage have already been erased by sea-level rise and coastal erosion. Future losses could be even more severe. The island’s cultural heritage will only grow more precarious without meaningful preservation and climate adaptation efforts.

However, many of Djerba’s monuments, historical buildings and traditional dwellings have suffered from years of neglect. A chronic lack of local and international funding, as well as weak institutional frameworks for heritage management, mean some of the island’s historic structures have been abandoned. Many other buildings have deteriorated due to a lack of protective measures and maintenance.

Community organisations such as the Association for the Safeguarding of the Island of Djerba have tried to step in to fill the void left by weak institutional frameworks. Their work ranges from delivering public awareness campaigns to local young people to efforts like re-purposing ancient rainwater tanks to manage periods of drought.

But these grassroots efforts alone are not enough to stop Djerba’s cultural heritage from deteriorating at its current pace.

In September 2023, the UN Educational, Scientific and Cultural Organization (Unesco) announced that it was adding Djerba to its list of world heritage sites. Tunisia’s culture ministry welcomed the decision. It followed years of efforts by local groups and government officials to add Djerba to the list.

Djerba’s inclusion offers hope for the long-term preservation of the island’s heritage. A world heritage site designation increases global recognition and enables improved access to sources of funding.

And since Djerba’s classification, there has been some progress. The culture ministry has established a task force to monitor the construction of buildings and other infrastructure, collect data on designated protected areas, and prepare projects to preserve heritage sites.

But Djerba’s cultural heritage remains in danger. Improved preservation of these sites will require continuous funding and stringent regulation of tourism and construction activities.

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

– ref. Popular Tunisian island’s cultural heritage at risk due to tourism, neglect and climate change – https://theconversation.com/popular-tunisian-islands-cultural-heritage-at-risk-due-to-tourism-neglect-and-climate-change-223612

Source: The Conversation – UK – By Felicia Liu, Lecturer (Assistant Professor) in Sustainability, University of York

Throughout history, people have viewed seasons as relatively stable, recurrent blocks of time that neatly align farming, cultural celebrations and routines with nature’s cycles. But the seasons as we know them are changing. Human activity is rapidly transforming the Earth, and once reliable seasonal patterns are becoming unfamiliar.

In our recent study, we argue that new seasons are surfacing. These emergent seasons are entirely novel and anthropogenic (in other words, made by humans).

Examples include “haze seasons” in the northern and equatorial nations of south-east Asia, when the sky is filled with smoke for several weeks. This is caused by widespread burning of vegetation to clear forests and make way for agriculture during particularly dry times of year.

Or there is the annual “trash season”, during which tidal patterns bring plastic to the shores of Bali, Indonesia, between November and March.

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At the same time, some seasons are disappearing altogether, with profound consequences for ecosystems and cultures. These extinct seasons can encompass drastically altered or terminated migratory animal behaviour, such as the decline of seabird breeding seasons in northern England.

Climate change is also calling time on traditional winter sport seasons by making snow scarcer in alpine regions.

Nature’s new rhythms

Perhaps more common are “syncopated seasons”. The changes are akin to new emphases on beats or off-beats in familiar music that capture the listener’s attention.

Syncopated seasons include hotter summers and milder winters in temperate climates, with increasingly frequent and severe extreme weather that exposes more people and ecosystems to stress.

The timings of key seasonal events, like when leaves fall or certain migratory species arrive, are becoming more unpredictable. We coined the term “arrhythmic seasons”, a concept borrowed from cardiology, to refer to abnormal rhythms which include earlier springs or breeding seasons, longer summers or growing seasons, and shorter winters or hibernating seasons.

Changing seasonal patterns throw the interdependent life cycles of plants and animals out of sync with each other, and disrupt the communities that are economically, socially and culturally dependent on them.

In northern Thailand, human activity has reshaped nature’s rhythms and affected the supply of water and food in turn. Communities along the Mekong river’s tributaries have relied on the seasonal flow of rivers to fish and farm for generations.

At first, upstream dams disrupted these cycles by blocking fish migration and preventing the accumulation of sediment that farms need for soil. More recently, climate change has shifted rainfall patterns and made dry seasons longer and rainy seasons shorter but more intense, bringing fires and further uncertainty to farmers.

Let’s rethink time

How we react to changing seasonal patterns can either worsen or improve environmental conditions. In south-east Asia, public awareness of the “haze season” has led to better forecasting, the installation of air filters in homes and the establishment of public health initiatives.

These efforts help communities adapt. But if society only uses adaptive fixes like these, it can make the haze worse over time by failing to tackle its root causes. By recognising this new season, societies might normalise the recurrence of haze and isolate anyone who demands the government and businesses deal with deforestation and burning.

Powerful institutions like these shape narratives about seasonal crises to minimise their responsibility and shift blame elsewhere. Understanding these dynamics is crucial to fostering accountability and ensuring fair responses.

The shifting seasons require us to rethink our relationship with time and the environment. Today, most of us think about time in terms of days, hours and minutes, which is a globalised standard used everywhere from smartphones to train timetables. But this way of keeping time forgets older and more local ways of understanding time – those that are shaped by natural rhythms, such as the arrival of the rainy season, or solar and lunar cycles, rooted in the lives and cultures of different communities.

Diverse perspectives, especially those from Indigenous knowledge systems, can enhance our ability to respond to environmental changes. Integrating alternative time-keeping methods into mainstream practices could foster fairer and more effective solutions to environmental problems.

Seasons are more than just divisions of time – they connect us with nature. Finding synchrony with changing seasonal rhythms is essential for building a sustainable future.

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

– ref. Farewell to summer? ‘Haze’ and ‘trash’ among Earth’s new seasons as climate change and pollution play havoc – https://theconversation.com/farewell-to-summer-haze-and-trash-among-earths-new-seasons-as-climate-change-and-pollution-play-havoc-260765

Source: The Conversation – UK – By Hemamali Tennakoon, Senior Lecturer in Strategy and Management, Brunel University of London

With its natural beauty, wildlife and culture, Sri Lanka is known as the “pearl of the Indian Ocean”, and attracts millions of tourists every year.

But my research suggests that the country might not be so reliant on tourism in the future, as it looks to become a major player in global maritime trade. The island’s numerous harbours and enviable location along international sea routes have led to major investment from China and the US, as they seek to extend their strategic influence in the region.

That investment is being welcomed after years of economic and political turmoil in Sri Lanka.

The Easter bombings of 2019 targeted Catholic churches and hotels, killing 269 people and devastating tourism. The same year, significant tax cuts slashed government revenue before COVID did serious damage to the economy.

In 2021, a ban on chemical fertilisers led to nationwide agricultural failure, while excessive borrowing and money printing triggered soaring inflation, which peaked at 70% in August 2022. The country ended up failing to pay its foreign debts.

Following huge protests in 2022 and the resignation of the president, Sri Lanka began a major political and economic shift. It secured a bailout from the International Monetary Fund and implemented reforms aimed at stabilising the economy.

So far, some of the effects have been positive. Inflation has eased, investor confidence has improved and more tea, clothing and rubber products are being exported up.

Key to this has been improved logistics and port infrastructure. Business at the port of Colombo, the country’s largest, is booming, aided in part by global shipping disruptions, including the Red Sea crisis, which rerouted vessels through the Indian Ocean.

But international maritime ambitions can be a complex affair, and Sri Lanka needs to be wary of becoming just a well-positioned commodity for the world’s economic superpowers.

China for example, has secured a controversial 99-year lease of Hambantota port. India, wary of Chinese encroachment, has ramped up its own investments, including the development of a container terminal in Colombo.

In 2023, the US announced a US$500 million (£372 million) plan to develop a deep-water shipping container terminal at the port of Colombo. And the potential US tariffs of 30% on imports from Sri Lanka have been interpreted by some as a pressure tactic to get greater access to its waters.

Balancing these interests is a delicate act. While foreign investment is crucial for infrastructure development, Sri Lanka needs to protect its sovereignty and ensure that port operations serve national, not just international, interests.

My research suggests that one way of building a resilient and diverse Sri Lankan economy would be to focus on its surrounding waters. Sri Lanka’s vast “exclusive economic zone”, an area of sea where it controls marine resources, holds massive untapped potential.

Blue economy

This potential lies in traditional sectors like fisheries and tourism, but also emerging industries such as marine biotechnology.

This growing field offers opportunities in things like bioengineering and marine-based pharmaceuticals. With other countries rapidly advancing in these sectors, Sri Lanka is well-positioned to follow suit and become a regional leader in the blue economy (economic activities associated with the sustainable use of ocean resources).

But there is still a complex web of geopolitical interests and economic pressures to navigate, as well as environmental challenges.

At the moment for example, the Sri Lankan government is making plans for the deep natural port at Trincomalee to become a major marine repair and refuelling centre between Dubai and Singapore. Other proposed projects include offshore wind farms and oil rig facilities.

The country also needs to compete with the likes of Malaysia, which is investing heavily in AI-driven port operations. To stay competitive, Sri Lanka must modernise infrastructure and streamline processes.

And despite the progress, challenges persist. Poverty in Sri Lanka has doubled since 2021, while youth unemployment remains high.

Sri Lanka faces rising maritime threats like piracy and illegal fishing, requiring stronger maritime surveillance. Simultaneously, port expansion risks damaging marine ecosystems. Green technologies and stricter environmental regulations are essential for long-term security and sustainability.

Sri Lanka’s strategic location and maritime heritage offer a foundation for economic renewal. With wise governance, sustainability, and balanced geopolitics, its ports could once again become vital gateways to regional prosperity and global trade.

Hemamali Tennakoon 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. As Sri Lanka’s economy pivots from tourism, it’s well placed to benefit from global trade and geopolitical jostling – new research – https://theconversation.com/as-sri-lankas-economy-pivots-from-tourism-its-well-placed-to-benefit-from-global-trade-and-geopolitical-jostling-new-research-261231

Source: The Conversation – UK – By Winnie Courtene-Jones, Lecturer in Marine Pollution, Bangor University

Representatives from 175 countries will gather in Geneva, Switzerland, in August for the final round of negotiations on a legally binding UN treaty to end plastic pollution. Non-governmental organisations, academics and industry lobbyists will also be in the room. They will all be hoping to influence what could be the world’s first truly global agreement on plastics.

The summit, known as “INC-5.2”, follows a failed attempt to reach agreement in Busan, South Korea, late last year. That meeting ended without resolving important issues, despite hopes that it would conclude the treaty process. Now, it’s crunch time in Geneva.

Either countries bridge their political divides, or risk the whole process falling apart.

I’ve been researching the effects of plastic for more than a decade and have been involved in the UN treaty process since 2022. I’ve attended several of the negotiations and will be in Geneva next month. The science is clear: we need ambitious action which tackles every stage of the plastics lifecycle, from production through to disposal. But the question is, will countries deliver?

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In 2022, the UN Environment Assembly agreed to develop a legally binding treaty to end plastic pollution. Since then, progress has been slow. Negotiations have repeatedly stalled over issues such as whether the treaty should limit plastic production or regulate chemicals, how to define terms, and how to fund implementation.

Industry lobbying has also played a powerful role throughout. At the last round of talks, lobbyists for the petrochemical and plastics industries made up the single largest delegation. They outnumbered representatives from the EU, all of Latin America, the Pacific islands, independent scientists and Indigenous communities. This imbalance threatens to weaken the science-based action that is urgently needed.

Although countries failed to reach agreement in Busan, a foundation was laid. They agreed to continue negotiations using the “chair’s text”, which is a draft treaty with multiple options still on the table. That document forms the starting point in Geneva. But it remains uncertain whether enough common ground can be found to finalise the text.

What’s at stake?

This treaty is a once-in-a-generation chance to tackle one of the world’s most urgent environmental crises. More than 450 million tonnes of plastic are produced every year. That figure is expected to double by 2045 if current trends continue.

Only around 9% of plastic is ever recycled. The rest is landfilled, incinerated or ends up polluting the environment.

An estimated 139 million tonnes of plastics pollute marine and fresh water. But that could be significantly higher when considering leakages of plastics to land, and from microplastics, which are plastics smaller than 5mm in diameter.

Plastic is found in the deepest oceans, the remotest mountains and inside the human body. While scientists are only beginning to understand the long-term implications for human health, biodiversity and climate, studies show harmful effects of plastics and their chemicals on animals and ecosystems.

Plastic pollution doesn’t respect national borders. It moves through rivers, oceans and air, and gets carried across continents. Global supply chains and waste exports have made this a problem no country can solve alone. That’s why a global treaty is essential.

Crossroads

Despite this growing urgency, a disparity in positions has hindered progress and continues to divide delegations.

Some, such as members of the High Ambition Coalition, a group of countries committed to progressive climate action, want strong rules to cap plastic production, phase out toxic chemicals and hold polluters accountable. Others, often with prominent petrochemical industries, argue for a weaker, voluntary approach focused mainly on recycling and waste management.

Read more:
A global plastic treaty will only work if it caps production, modelling shows

If these divisions aren’t resolved, there’s a real risk the treaty will end up being too watered down to make a difference. A patchy, fragmented agreement would fail to curb rising plastic production and could undermine the integrity of global action.

Between December’s meeting in Busan and next month’s talks, countries have been holding smaller meetings to try to find compromise. That momentum must now be carried into the final negotiations.

Important articles in the draft treaty, including those on chemicals and products, plastic production and finance, remain contested. Whether those provisions are strengthened or diluted will shape the treaty’s effects for decades to come.

Flexibility will be needed. But leadership is also crucial. Countries that support an ambitious outcome must stand firm and bring others with them.

As we approach what may be the final negotiating round, we’re at a critical crossroads. The world has the chance to take meaningful action on plastic pollution. Let’s not waste it.

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Winnie Courtene-Jones is an unpaid member and working-group lead of the Scientists’ Coalition for an Effective Treaty; an International network of independent scientific and technical experts contributing robust scientific evidence to the Treaty process.

– ref. A global treaty to limit plastic pollution is within reach – will countries seize the moment? – https://theconversation.com/a-global-treaty-to-limit-plastic-pollution-is-within-reach-will-countries-seize-the-moment-261331

Source: The Conversation – UK – By Adam Taylor, Professor of Anatomy, Lancaster University

If something online promises to cure everything, it’s probably too good to be true. One of the most dangerous examples? Chlorine dioxide is often marketed under names like “Miracle Mineral Solution (MMS)” or “aerobic oxygen”, buzzwords that hint at health and vitality.

But in reality, these products can make you violently ill within hours – and in some cases, they can be fatal.

Despite what the name suggests, MMS is not just bleach. Bleach contains sodium hypochlorite, whereas MMS contains sodium chlorite – a different but equally toxic chemical.

When ingested, sodium chlorite can cause methemoglobinemia, a condition where red blood cells lose their ability to carry oxygen. It can also trigger haemolysis (the rupture of red blood cells), followed by kidney failure and death.

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When sodium chlorite mixes with acid (such as stomach acid), it converts into chlorine dioxide, a bleaching agent. This compound has strong antimicrobial properties: it can kill bacteria, fungi and even viruses like SARS-CoV-2. For that reason, it’s commonly used in sanitising dental equipment and hospital tools like endoscopes. Its effectiveness at killing over 400 bacterial species makes it useful in cleaning – but not in humans.

While the mouth and oesophagus are lined with multiple cell layers, offering some protection, the stomach and intestines are far more vulnerable. These organs have a single-cell lining to absorb nutrients efficiently – but this also means they’re highly sensitive to damage.

That’s why ingesting chlorine dioxide often leads to nausea, vomiting, abdominal pain, and diarrhoea. In extreme cases, the chemical can burn through the gut lining, leading to bowel perforation – a medical emergency with a high risk of death.

Using MMS as an enema is equally dangerous. Chlorine dioxide can trigger an overproduction of reactive oxygen species – unstable molecules that damage cells and contribute to chronic gut conditions. This cellular stress may explain both the immediate symptoms and the long-term injuries seen in reported cases.

It doesn’t make a good mouthwash, either

Some sellers claim MMS can be used safely in the mouth because it’s found in dental cleaners. But clinical trials show it’s no more effective than other mouthwashes, and its oxidising power doesn’t distinguish between harmful microbes and healthy cells.

Yes, it may temporarily reduce bad breath, but it also disrupts protein synthesis, damages cell membranes, and harms the gut microbiome – the collection of helpful bacteria we rely on for digestion and immune health.

Chlorine dioxide doesn’t just attack the gut. It also affects the cardiovascular system. Documented risks include low blood pressure, fainting, and cardiac damage – including stroke and shock.

In some cases, it causes a dangerous blood disorder called disseminated intravascular coagulation (DIC). This condition causes abnormal clotting, followed by severe bleeding and potential organ failure, stroke and death.

Chlorine dioxide is also a respiratory irritant. Inhalation can inflame the nose, throat and lungs, and in severe cases, cause respiratory distress – particularly with repeated exposure in workplaces.

Studies of factory workers show that even low doses can lead to nasal inflammation, coughing and breathing difficulties. And some patients who drank chlorine dioxide to “treat” COVID-19 ended up with severe chemical lung injuries.

Risks to the brain, hormones and skin

Animal studies suggest chlorine dioxide can harm the nervous system, causing developmental delays, reduced movement, and slower brain growth. It also appears to affect the thyroid, potentially causing hormonal disruptions and delayed puberty.

It doesn’t stop there. Some people who consume chlorine dioxide also develop cerebral salt wasting syndrome, a condition where the kidneys lose too much sodium, leading to excessive urination, dehydration and dangerously low blood volume.

Skin contact isn’t safe either. Chlorine dioxide can irritate the skin, and lab studies show it can kill skin cells at high concentrations. People who’ve used it to treat fungal infections have ended up with chemical dermatitis instead.

Chlorine dioxide can be useful for disinfecting hospital tools, dental equipment and water supplies. But that doesn’t mean it belongs in your body. Many of its supposed “benefits” come from lab studies or animal research – not from safe, approved human trials.

There’s no evidence that drinking it cures any disease. There’s overwhelming evidence that it can harm or kill you.

So, if you’re tempted by a product that promises miracles with science-y language and zero regulation, take a step back. The risks are very real – and very dangerous.

Adam Taylor 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. From ‘MMS’ to ‘aerobic oxygen’, why drinking bleach has become a dangerous wellness trend – https://theconversation.com/from-mms-to-aerobic-oxygen-why-drinking-bleach-has-become-a-dangerous-wellness-trend-260761