 The Distance Between Consumption and Consequence A few days ago, during a boat trip in Mayotte, an unexpected conversation brought me back several decades. On board was a philosophy teacher. Between discussions about coral reefs, ocean temperatures and the state of the lagoon, she suddenly brought me back to memories from high school that I thought I had left far behind : Rousseau, Voltaire, progress, nature… and an old question humanity seems to have been asking itself for centuries without ever truly answering. What is progress? On my way home, another image resurfaced in my mind. A scene from Wall Street: Money Never Sleeps. A journalist asks the richest man in the world what his limit is. The answer comes instantly: “More.” Always more. More growth. More comfort. More consumption. More speed. More status. But can a civilization built around the idea of endless “more” truly continue forever on a finite planet  Rousseau versus Voltaire In many ways, our modern world feels like a contemporary confrontation between Jean-Jacques Rousseau and Voltaire. Voltaire deeply believed in human progress. In science, reason and knowledge as tools capable of improving society and freeing humanity from ignorance. And it would be difficult to say he was wrong. Never before has humanity possessed such technological power, scientific understanding and access to information. We can monitor oceans from space. Predict climatic events. Measure sea surface temperatures in real time. Understand the mechanisms behind coral bleaching and global warming. But Rousseau saw another danger. The possibility that humanity could slowly disconnect itself from the living world. A society where material comfort, social recognition and the constant search for status would gradually replace what truly matters. Looking at modern life today, it is difficult not to see how relevant his concerns still feel. Consumption is no longer merely economic. It has become deeply tied to identity. We no longer simply buy objects. We buy an image of ourselves. A sense of belonging. Social validation. Social media, marketing and the attention economy have transformed human desire into a permanent engine of growth. Perhaps this is the real contradiction of our era: collectively, we understand the ecological dangers approaching us, yet socially we continue accelerating in the opposite direction.  Meanwhile, the ocean keeps warming For a long time, the consequences of our lifestyles remained distant and invisible to most people. But today, the oceans are beginning to tell another story. Scientists have observed repeated global records in ocean temperatures over recent years. Even more concerning, several climate models now suggest that a new El Niño event could develop in the coming months, potentially shaping the year 2027 with intensified marine heatwaves and climatic instability. In the past, El Niño represented a temporary peak within a relatively stable system. Today, the baseline itself appears to have changed. And this is precisely what worries climate scientists: a future El Niño occurring while the oceans are already abnormally warm could amplify marine heat stress across the planet. For coral reefs, the implications are enormous. Corals can sometimes survive a crisis. A heatwave. A cyclone. A bleaching event. But what they endure less and less is the absence of recovery time. Each new thermal anomaly strikes ecosystems that often have not yet recovered from the previous one. In Mayotte, reefs still bear the scars of the 2024 bleaching event and the passage of Cyclone Chido. And now, outbreaks of Acanthaster planci are adding another layer of pressure onto already weakened ecosystems. Beneath the surface, agents from the Parc naturel marin de Mayotte inject vinegar into these starfish in an attempt to limit the damage. A discreet battle. Almost silent. While thousands of kilometers away, the world continues consuming, producing and accelerating as if coral reefs were nothing more than distant tropical postcards disconnected from everyday life.  Economic time versus the time of life Modern society operates through speed:
Perhaps this is one of the greatest contradictions of our time: we have created a civilization capable of moving endlessly faster, without truly accepting that nature itself operates within biological limits. The issue may not be progress itself, but a model of progress that forgot the planet also needs time to breathe, recover and régénération  Rediscovering something essential When human beings suffer, they often try to fill the emptiness. Some lose themselves in alcohol, drugs, excess, endless consumption or the constant search for external validation. Others, almost instinctively, turn toward the sea, the mountains or the forests. As if beneath centuries of modernity, something inside us still recognizes nature as a form of grounding impossible to replace. I often feel it at sea. I gear up. I descend to ten meters. And suddenly, a group of offshore bottlenose dolphins emerges from the blue. At that moment, nothing from the modern world truly exists anymore. No status. No algorithms. No consumption. Only the presence of life itself. Amother dolphin slowly approaches with her calf. Her gaze locks onto mine. She almost studies me. Looks through me. As if, within the silence of the ocean, something is trying to understand who I really am beneath human appearances. For a few seconds, I experience the strange sensation that she perceives something deeper : my presence, my intention, perhaps even a part of what we call a soul. And then comes acceptance. A suspended moment where two living beings recognize each other within the same living world. And in moments like these, something becomes obvious: nature is not separate from humanity. It may simply be the place we drifted away from without ever completely ceasing to need it. Perhaps Rousseau understood this long before us : despite all the artifices of progress, human beings remain profoundly connected to the living world. Because in the middle of the ocean, humanity briefly stops trying to possess the world. And simply becomes part of it again.  When “more” becomes “less”
We built a civilization around the belief that more would always mean better. More comfort. More speed. More consumption. More social status. But somewhere along the way, more quietly became less. Less silence. Less human connection. Less connection to the living world. In our endless pursuit of comfort, accumulation and recognition, have we slowly lost the ability to see the extraordinary gift nature still offers us? At sea, far from notifications, algorithms and the permanent noise of modern life, human interactions become strangely simple again. Honest. Direct. Real. As if, detached for a few hours from the artificial rhythm of consumption, people naturally reconnect with something essential. Perhaps this is what Rousseau feared long before climate change existed : not only that society would disconnect itself from nature, but that it would eventually disconnect from itself. And perhaps coral reefs are simply the first visible witnesses of that separation. When the Animal Still Has the Right to Say No  The current was brutal that morning. Suspended in the blue, I kicked hard just to hold my position as a reef manta ray emerged from the haze. My objective was simple: obtain an identification photograph for the database of Manta Trust. But the manta kept its distance. Every time I tried to close the gap, she adjusted her trajectory. Not in panic. Not aggressively. Simply with a form of silent clarity. Today, I was not welcome. A few seconds later, she vanished into the milky turbulence of the current until her silhouette dissolved completely into the ocean. No photograph. No identification shot. Only absence.  When I lifted my head above the surface, two boats were observing the scene nearby. I could already feel the invisible gaze that now surrounds almost every interaction between humans and wild animals. Some perhaps envied my presence in the water. Others may have questioned it. Was this still observation? Field work? Conservation? Or simply another intrusion into a world that does not belong to us? A few months earlier, a documentary aired by Arte reignited public emotion around the last captive orcas of Marineland. Filmed by drone inside empty pools invaded by algae and silence, the images deeply shocked audiences. For decades, marine parks had sold the story of a magical connection between humans and the wild. Today, that narrative no longer works. And yet, I grew up with that fascination too. Like many children of my generation, I was raised on Flipper, on the imagery of marine parks and dolphins interacting with humans. Back then, we saw magic. I plead guilty too. As an adult living in Antibes, I visited Marineland without truly questioning what existed behind the pools and performances. At the time, I still knew very little about the marine world. Like many others, I was simply fascinated by these majestic animals evolving in direct contact with humans.  Then things slowly began to change. One day, a colleague told me about the documentary Blackfish and the growing controversy surrounding marine parks. I still remember my response: “At the rate things are going, maybe one day these captive animals will become the last witnesses of a planet humanity failed to protect.” Like remnants of a lost world. Looking back, that sentence reveals the mindset of an era in transition. We were beginning to understand the suffering linked to captivity, while simultaneously discovering another fear entirely: the fear of losing the wild itself. Our perspective has changed. What we accepted yesterday is no longer accepted today. And this evolution goes far beyond captivity alone. Even in human relationships, behaviors once normalized are now viewed differently. Our relationship with nature seems to be following the same path. Little by little, we are redefining the very notion of consent in our interactions with the living world.  But where should the line be drawn? Because at sea, reality is often far more nuanced than social media debates suggest. In Mayotte, the Bertrand brothers of SeaBlue Safari have spent nearly thirty years observing marine mammals. Mathias recently explained to me that the real problem does not necessarily come from professionals following strict interaction guidelines, but rather from the growing number of casual recreational boaters chasing “the perfect moment” for social media. Experience changes everything. Over time, some operators learn to read animals almost instinctively. They know when entering the water creates stress. They know when it is time to stop. Just yesterday, off the coast of Mayotte, a group of spinner dolphins appeared near the boat accompanied by newborn calves. The young dolphins were still swimming clumsily beside their mothers, in that fragile stage of life where they are simply learning how to survive. Nobody entered the water. Not out of frustration. Not out of lack of interest. But precisely because these animals were learning how to live. The boat remained at a distance. The engine idling softly. Then someone quietly said: “Today, we leave them alone.” No debate. No performance. No content to produce. Just the simple acceptance that some moments perhaps do not need to be turned into images. Because despite what we sometimes want to believe, animals communicate very clearly with us. A disturbed dolphin moves away. A manta ray keeps its distance. A stressed animal changes its behavior. The ocean rarely lies.  The real issue is that wildlife encounters have now become a global emotional industry. In the past, observing large wild animals required time and experience. Today, anyone can produce their own “wild encounter” using action cameras, drones or selfie sticks. As the Arte documentary accurately stated: “The action camera has replaced the harpoon.” We no longer capture bodies. We capture images. And the boundary between awareness, fascination and consumption of wildlife is becoming increasingly blurred. The paradox is that the very images capable of protecting wildlife can also increase pressure on it. For years, photographers in La Réunion created extraordinary images of humpback whales. These photographs inspired admiration and created a genuine emotional connection with the marine world. But they also created desire. People no longer wanted simply to look at whales. They wanted to enter the frame themselves. With social media, wildlife encounters gradually became experiences to live and share. More boats arrived. More swimmers entered the water. Until the marine park authorities in La Réunion were forced to impose much stricter rules to reduce pressure on the animals. Some photographers became frustrated by these restrictions. And yet, the situation reveals a deeper irony: the same imagery that helped people fall in love with whales also contributed — indirectly — to making these encounters more crowded and harder to regulate. Images create awareness. But they also create attraction.  And sometimes, attraction itself becomes a threat. Media figures such as Ocean Ramsey perfectly embody this modern ambiguity. For some, she helps transform public perception of sharks and contributes to their protection. For others, she turns conservation into permanent spectacle, where the animal becomes part of a personal visual performance. The truth probably lies somewhere in between. Because images have also changed the world. Without films, photographers or documentaries, how many people would ever have developed empathy for whales, dolphins or sharks? Organizations such as SeaLegacy or The Nature Conservancy understand this perfectly: powerful imagery can transform public perception and reconnect people emotionally to the living world. And paradoxically, it is those same images that now push society to question our right to approach wild animals in the first place. There is also another uncomfortable reality behind these debates. Modern society sometimes places enormous moral attention on visible interactions between humans and wildlife — a swimmer near a whale, a drone above an orca — while remaining strangely disconnected from the far larger environmental pressures we collectively normalize every day. Plastic waste. Coastal urbanization. Overconsumption. Invisible pollution. The slow destruction of natural habitats.  The irony is difficult to ignore. Many people who would morally condemn a photographer entering the water with a marine animal also continue, often unconsciously, participating in lifestyles that have a far greater impact on oceans and ecosystems. This does not mean wildlife interactions should escape ethical questioning. But perhaps conservation becomes dangerous when it focuses only on visible symbols while ignoring the much deeper systems quietly destroying the natural world itself. Wildlife photography is therefore entering an uncomfortable new territory — one where photographers must question not only the final image, but also the way it was obtained. Did the animal have a choice? Could it leave? Did we respect its refusal? That morning, in the current, the manta ray gave me a very simple answer. She left. And perhaps the true challenge of modern wildlife photography begins precisely there: accepting that the wild still has the right to say no. As I write these lines, I suddenly think again about the child I once was. The one who grew up with Flipper, the orcas of Marineland and that naive fascination for an ocean world I did not yet understand.  I also think about another figure from my childhood: Michael Jackson.
And for reasons I cannot fully explain, one song suddenly comes back to me: Man in the Mirror. Because beneath all these debates about captivity, drones, social media, photographers and tourism, perhaps there is a much simpler — and far more uncomfortable — question: Before judging others, are we truly capable of looking honestly at ourselves? So perhaps the real question is no longer: “What are others doing for the planet?” But rather: “What am I personally willing to change to protect the planet?” A form of personal responsibility. Almost a reflection inspired by John F. Kennedy: “Ask not what your country can do for you…” Because in the end, everything may indeed begin there. With the man in the mirror.
At the surface, the Indian Ocean does not appear different. Waves form, reefs breathe, currents continue their course. Yet within its very structure, something is changing: the salinity of certain regions in the southern Indian Ocean has been measurably and persistently declining for several decades.
A Change Detected Over Decades : This shift is not based on isolated observations. It relies on long-term oceanographic datasets dating back to the 1960s, compiled in the World Ocean Database maintained by NOAA:
https://www.ncei.noaa.gov/products/world-ocean-database These trends have been confirmed and refined by the Argo program, a global network of autonomous floats measuring temperature and salinity throughout the water column since the early 2000s: https://doi.org/10.1016/j.pocean.2009.03.004 Analyses indicate that parts of the southern Indian Ocean show a significant decrease in surface salinity. This signal fits within a broader intensification of the global hydrological cycle under climate change, as highlighted by Durack et al. (2012) in Science: https://www.science.org/doi/10.1126/science.1212222 and reinforced by the latest IPCC assessment (AR6 – Working Group I): https://www.ipcc.ch/report/ar6/wg1/ While global mean ocean salinity remains close to 35 PSU (Practical Salinity Units), that average conceals growing regional contrasts. Subtropical regions dominated by evaporation tend to become saltier, whereas certain tropical zones and parts of the southern Indian Ocean are becoming fresher. This pattern aligns with climate projections indicating that wet regions become wetter and dry regions become drier (IPCC, 2021). 
Why Salinity Is a Fundamental Physical Parameter : Salinity, together with temperature, determines seawater density. Density governs water mass dynamics and drives the global thermohaline circulation, as described by Talley (2013) in Oceanography:
https://doi.org/10.5670/oceanog.2013.07 Cold, salty water is dense and tends to sink, contributing to deep circulation that redistributes heat, nutrients, and oxygen across the planet. Warmer or fresher water is lighter and remains near the surface. If salinity declines, density decreases. Vertical mixing becomes less efficient and stratification intensifies. Stronger stratification limits exchanges between nutrient-rich deep waters and the sunlit surface layer. These exchanges are essential to the functioning of the ocean’s biological pump, a key process regulating carbon uptake and marine productivity, discussed in detail in the IPCC AR6 report: https://www.ipcc.ch/report/ar6/wg1/chapter/chapter-5/ 
Potential Consequences for Marine Ecosystems : The direct biological effects of moderate salinity decline vary by species and region. However, the underlying physical mechanisms are well established. Persistent changes in stratification can influence nutrient availability, alter plankton distribution, and cascade upward through marine food webs.
In the Indian Ocean, where coral reefs and coastal fisheries play major ecological and socio-economic roles, these structural shifts add to existing pressures from warming and acidification (IPCC, 2021). They represent a gradual reconfiguration — less visible than coral bleaching events, but potentially just as consequential over time. 
A Marker of an Intensifying : Water CycleSurface salinity is now recognized as a robust tracer of hydrological cycle intensification. A warmer atmosphere can hold more water vapor, modifying precipitation patterns and increasing regional contrasts (IPCC, 2021).
In the case of the Indian Ocean, the observed freshening reflects a progressive reorganization of the system. It is not immediately visible to the naked eye, but it influences water mass stability, regional circulation, and potentially atmosphere–ocean interactions, including those that contribute to monsoon dynamics. 
A Climate Paradox — Freshening in a Warming : World At first glance, the idea that parts of the Indian Ocean are “freshening” may sound contradictory in the context of global warming. But freshening does not mean cooling. It refers to a decline in salinity, not temperature. In fact, ocean warming and surface freshening are often linked through the same mechanism: an intensified hydrological cycle.
As the atmosphere warms, it holds more moisture, leading to stronger rainfall in some regions and enhanced evaporation in others. Where precipitation and freshwater inputs increase, surface waters become less saline even as they continue to warm. The result is not a cooler ocean, but a more stratified one — warmer at the surface, fresher at the top, and increasingly layered. This apparent paradox illustrates how climate change does not produce uniform responses, but rather a complex reorganization of ocean structure. 
Why the Ocean Is Salty — And Why That Matters : To understand why these variations are significant, it is useful to revisit a fundamental question: why is the ocean salty? Ocean salinity results from a dynamic balance established over millions of years. Rainwater dissolves minerals from continental rocks. Rivers transport dissolved ions to the sea. Submarine hydrothermal systems add additional chemical elements. When seawater evaporates, the water leaves but the salts remain. This cycle, explained by NOAA: https://oceanservice.noaa.gov/facts/whysalty.html has maintained a relatively stable global salt balance on geological timescales. A rapid regional shift in salinity does not mean the ocean is “losing its salt” globally. Rather, it indicates that the distribution of freshwater is changing enough to alter the physical structure of the water column. 
A Silent but Structural Transformation : Public discussions about ocean change often focus on rising temperatures or acidification. Yet salinity reveals a complementary and essential dimension: how accumulated energy in the climate system redistributes freshwater and reshapes ocean structure.
If temperature tells us how much the ocean is warming, salinity tells us how it is reorganizing. Beneath the apparently unchanged surface of the Indian Ocean, this transformation is already measurable. It is gradual, physically consistent with climate projections, and potentially decisive for marine ecosystems and circulation patterns in the decades ahead.  Bleaching is real Yesterday, while reading “Vive la resilience: don’t write off our corals just yet” published by Oceanographic Magazine, I felt an unexpected mix of emotions — a sense of genuine hope, knowing that some reefs still show signs of resistance, and yet, a deep lingering doubt. Far be it from me to question scientific voices — I know the rigour, the countless hours spent observing, measuring, understanding. But this optimism, as necessary as it is, raises a fundamental question: how far can we speak of hope without lying to ourselves? When scientists say “not all reefs are lost,” is it a cry of resistance… or a sign of an institutional need to stay heard ? As I read those words, I couldn’t help thinking about what I see underwater every week: bleaching spreading like a slow tide, colonies dying quietly, and parts of the lagoon where life simply fades away. Maybe not everything is lost — but we must still have the courage to admit that some of it already is.  Hope is necessary. Scientists Live on ProjectsIn science, hope isn’t just a feeling — it’s a condition of survival. To secure funding, you must convince others that solutions exist, that research can still turn the tide. A project titled “the end of coral reefs” will never receive a grant; one that speaks of “resilience” or “regeneration” almost always will. It’s human, even understandable. But when science becomes dependent on narratives of hope, the gravity of reality gets blurred. And the risk is clear: truth — the uncomfortable kind — dissolves into the language of promises.  But then, which truth is real? Hope as an Academic Survival Strategy In a world oversaturated with bad news, hope has become a tool of communication. Institutions need it — to keep public support, to soothe fear, to maintain trust. So we speak of resilience, of rebirth, of corals adapting to change. All of that exists, of course; some reefs do resist better than others. But when we repeat too often that “nature can heal itself,” we normalize irreversible damage. If hope becomes an academic strategy, we are no longer talking about science — we are talking about narrative survival: a discourse fine-tuned to reassure funders, governments, and sometimes our own conscience.  The best way to approach truth is through investigation — not opinion. Science Under Narrative Influence Science is never completely neutral; it evolves within its era, language, and politics. When a study highlights signs of resilience rather than signs of collapse, it’s often a matter of framing, not manipulation. But the accumulation of these choices creates a trend — a form of science shaped by its narrative. Not because it lies, but because it selects what to show to avoid despair. It’s subtle, almost invisible. Yet it changes everything. It turns science into a kind of benevolent storytelling, where lucidity becomes risky, and hope an unspoken moral duty. Behind that narrative, however, lies a simple reality: without funding, research stops. Scientists must persuade their sponsors — public or private — that their work will lead to solutions, not just acknowledgements of failure. In this system, the language of hope becomes almost a currency: it unlocks grants, European programs, political endorsements. In other words, to keep working, one must keep believing.  Hope is not in the équation for wildlife The Sincere but Biased Faith Most scientists I meet are sincere. They believe in what they do — and they still hope. And thankfully so: without that flame, who would dive again on a dying reef? But sometimes that faith in coral resilience becomes so strong it blurs critical distance. We begin to confuse wanting to believe with seeing what is. And that’s where danger begins: when hope takes the place of truth, we stop measuring the true extent of loss. We talk about regeneration without admitting that it takes decades — sometimes centuries — for a reef to rebuild. Resilient corals do exist — often deeper, between 20 and 50 meters. But that resilience raises another question: at what ecological cost do they survive? A deep reef doesn’t offer the same light, the same warmth, nor the same biodiversity as a shallow one. If the future of coral shifts to those depths, the balance of tropical lagoons will change entirely: herbivorous fish disappear from the shallows, food chains reconfigure, and coastal fisheries — lifelines for thousands of families — become increasingly unstable. In other words, coral resilience does not guarantee human resilience. It merely pushes life to places where we can no longer see it.  How long to see this again ? When Everyone Speaks, Who Tells the Truth?In a world where funding, science, media, and politics constantly collide, the role of the field reporter — the one who goes, sees, and listens — has never been more essential. Because even when science remains sincere, it is rarely free from influence. Many scientists I’ve met are in the water, day after day, facing the same realities we do. Their commitment is unquestionable. But the system they work within — the race for grants, visibility, and recognition — can shape how truth is told. When your next expedition depends on a funder’s approval, when “hope” sounds better in a proposal than “collapse,” it becomes harder to speak without filters. Some projects blur the line between research and personal ambition, between fieldwork and privilege. It’s not corruption; it’s the quiet pressure of a system that rewards optimism more than honesty. When scientists publish opinion pieces or “hope essays,” they often do so with sincerity — but without contradiction, or without the space for facts and data that challenge their narrative. Few journals give room to opposing analyses on the same topic. The result is not misinformation, but imbalance. A subtle shift where communication starts to replace truth. And this is precisely where the work of independent photographers, divers, and field journalists matters. Not to oppose science, but to complete it. To bring back the tangible — what the ocean actually looks like, smells like, feels like. To show that truth doesn’t always come from a lab or a grant, but sometimes from the quiet evidence of being there, eyes open, camera in hand.  Just the fact not hope Hope is vital — it drives us to act, to protect, to educate.
But it should never become a filter that softens reality. Because behind every optimistic sentence are images I can’t forget: corals white as ash, fish circling in emptiness, once-vibrant zones now silent. They are not even “white corals” anymore — the coral is gone, replaced by bare rock. Between hope and alarmism lies another path — that of truth. To tell what we see, without exaggeration, without dilution. To remind ourselves that resilience does not erase human impact, and that survival at depth does not equal recovery at the surface. Yes, some reefs endure. But most decline. And to speak only of resilience, without showing that decline, is to risk normalizing disaster. Because in the end, doesn’t this constant optimism serve, ironically, as the victory of climate sceptics? By reassuring, we disarm. By saying “not all is lost,” we delay urgency. And by the time truth finds its voice again, the ocean will already have changed its face. 
Here affects there.
1) What happened last week
From 5–15 August 2025 in Geneva, delegates reconvened the fifth negotiating session on a UN plastics treaty. This was INC-5.2—the second half of the same session that began in Busan (25 Nov–1 Dec 2024, INC-5.1). Same meeting, resumed from the existing working text. Once again, talks ended without consensus or a final text. The fault line.
By the numbers (per day, order-of-magnitude)
Plastic residues in a turtle – Kelonia
2) What the agreement aimed for—and why
The UN mandate is for a legally binding treaty that covers the entire life cycle of plastics: design (re-use, repairability, recycled content), production (limits on virgin volumes; control of problematic polymers/additives), consumption(phasing out the most harmful items), end-of-life (collection, recycling, EPR, trade in waste), and microplastics. The ambition is simple: without new policies, production and waste climb steeply toward 2060, and leakage to nature rises with them. Caps and chemical controls are the upstream levers many countries want on the table. 
Choose a mug over plastic cups
3) In practice, at sea: risks & consequences
Lagoon fish in Mayotte feeding on a plastic bag
FAQ — Plastics & the OceanDo plastics dissolve in the ocean? How long does a plastic bottle take to break down?Plastics don’t “dissolve.” Most (like PET bottles) fragment under UV and abrasion into micro- and nanoplastics. Estimates for a plastic bottle at sea range from ~100 to 500+ years, highly dependent on sun, heat, waves, and biofouling. The fragments persist and can circulate indefinitely. What are the main harms of ocean plastics to wildlife?
What are microplastics and nanoplastics?Microplastics are plastic particles <5 mm; nanoplastics are typically <1 µm. They come from fragmentation of larger items, synthetic fibers, tire wear, microbeads, and industrial pellets. They enter marine food webs from plankton upward. What do we know about health impacts on humans?Micro- and nanoplastics have been detected in some human tissues and fluids. Lab and animal studies suggest possible inflammation, oxidative stress, and exposure to additives (e.g., phthalates, BPA) with endocrine activity. Real-world dose–response and long-term effects remain under study; a precautionary approach is warranted. Are biodegradable or compostable plastics a solution at sea?Not reliably. Most “compostable” plastics need industrial conditions (heat, humidity, microbes) that the ocean lacks. “Oxo-degradable” plastics fragment but don’t truly biodegrade in marine settings. At sea, these materials can persist and behave much like conventional plastics. What is ghost gear?Lost, abandoned or discarded fishing gear (nets, lines, traps). Made from durable synthetics, it can continue catching and killing wildlife for years, while shedding microplastics. Which products drive most ocean leakage?Globally, the heaviest contributors include single-use packaging (bottles, caps, wrappers, sachets, polystyrene foodware), cigarette filters, and lost fishing gear. Leakage hotspots are typically near rivers, dense coasts, and regions with limited waste services. What actions reduce ocean plastic now?
4) What next? Diplomats and observers see a few paths:
Hot wave of Climate chance
How Heatwaves Will Reshape Our Lives – And Why We Need to Talk About It Now
In a previous article, I questioned how our brain perceives—or ignores—climate change. Why so much inaction despite clear warning signs?
As a photographer committed to conservation, this question haunts me: do my images still have an impact? And if so, should they showcase beauty… or danger? Neuroscientist Albert Moukheiber reminds us: to raise awareness, we need to talk about tangible, close, and concrete events. And what’s more tangible than a heatwave? I’m also an economics teacher. And when I hear business leaders on the radio expressing concern about declining profits during heatwaves, I realize something: to talk about ecology to some people, we first need to talk about money. Maybe if we took the time to observe the real cost of heatwaves, we’d understand that climate change isn’t a distant abstraction… but a present economic, social, and human variable. And a global issue, not just a national one. 
Climate change : Where is the Nature ?
WHY IS IT GETTING HOTTER? WHERE DO MODERN HEATWAVES COME FROM ?
Since 1970, the frequency of heatwaves has increased 5 to 10 times depending on the region. 
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Choose your future
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Choose your future
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WELLBEING, MOBILITY & AN INVISIBLE LEVER
In France, the average home-work distance is 15.7 km.
That’s 31.4 km round trip, often by car. Over a year (220 working days), that's nearly 7,000 km driven per person, mainly in cities.
Let’s imagine two people doing the same job at the same salary—but living on opposite ends. They cross paths every morning in traffic. What if we hired more locally?
The French Environment Agency estimates that reducing just 10% of these daily trips would save the equivalent of 66 roundtrip flights Paris–New York in CO₂ per year, in just one urban area.
It’s not just ecological. It’s also a question of wellbeing. Shorter commutes reduce stress, absenteeism, and improve quality of life. A lever too often overlooked.
In France, the average home-work distance is 15.7 km.
That’s 31.4 km round trip, often by car. Over a year (220 working days), that's nearly 7,000 km driven per person, mainly in cities.
Let’s imagine two people doing the same job at the same salary—but living on opposite ends. They cross paths every morning in traffic. What if we hired more locally?
The French Environment Agency estimates that reducing just 10% of these daily trips would save the equivalent of 66 roundtrip flights Paris–New York in CO₂ per year, in just one urban area.
It’s not just ecological. It’s also a question of wellbeing. Shorter commutes reduce stress, absenteeism, and improve quality of life. A lever too often overlooked.
Collective transport ?
Heatwaves, Climate & Hidden Costs: The Economic Price of Global Warming :
Behind the official rhetoric, climate change often hides deep hypocrisies.
The first plays out on our roads: in the name of a cleaner planet, the most polluting vehicles are banned from major European cities like Paris through Low Emission Zones (LEZ). Yet those very same vehicles — 2CVs, Renault 4Ls, old diesel 4x4s and buses — are exported to developing countries, where they run daily. In Antananarivo, Madagascar, traffic jams are accompanied by a constant stream of black exhaust, proof that the pollution hasn’t disappeared… it has simply changed latitude.
The second hypocrisy takes to the skies. Certain regional flight routes deemed “unprofitable” are cut, forcing passengers to take far longer itineraries. A direct flight from Mayotte to Madagascar (about 724 km) has been replaced by a connection via Réunion (Mayotte–Réunion: 1,414 km, then Réunion–Madagascar: 857 km). The result: more than double the distance flown, producing roughly 2.4 times more CO₂ per passenger, solely because the direct link was removed.
Instead of undermining these “short-haul” regional routes, governments could introduce a decarbonisation incentive: subsidising airlines that commit to cutting emissions through sustainable fuels, more efficient aircraft, or carbon quotas. Conversely, penalties should apply to carriers that eliminate these links in favour of more polluting itineraries.
These contradictions show that the ecological transition cannot simply shift pollution elsewhere or hide its real cost. It demands coherent, measurable policies that deliver a genuine climate benefit.
Behind the official rhetoric, climate change often hides deep hypocrisies.
The first plays out on our roads: in the name of a cleaner planet, the most polluting vehicles are banned from major European cities like Paris through Low Emission Zones (LEZ). Yet those very same vehicles — 2CVs, Renault 4Ls, old diesel 4x4s and buses — are exported to developing countries, where they run daily. In Antananarivo, Madagascar, traffic jams are accompanied by a constant stream of black exhaust, proof that the pollution hasn’t disappeared… it has simply changed latitude.
The second hypocrisy takes to the skies. Certain regional flight routes deemed “unprofitable” are cut, forcing passengers to take far longer itineraries. A direct flight from Mayotte to Madagascar (about 724 km) has been replaced by a connection via Réunion (Mayotte–Réunion: 1,414 km, then Réunion–Madagascar: 857 km). The result: more than double the distance flown, producing roughly 2.4 times more CO₂ per passenger, solely because the direct link was removed.
Instead of undermining these “short-haul” regional routes, governments could introduce a decarbonisation incentive: subsidising airlines that commit to cutting emissions through sustainable fuels, more efficient aircraft, or carbon quotas. Conversely, penalties should apply to carriers that eliminate these links in favour of more polluting itineraries.
These contradictions show that the ecological transition cannot simply shift pollution elsewhere or hide its real cost. It demands coherent, measurable policies that deliver a genuine climate benefit.
Old car, second market...
TAXES, INFRASTRUCTURE, WHO WILL PAY ?
More frequent heatwaves mean:
So yes, climate has a financial cost. And pretending otherwise is just deferring the bill.
More frequent heatwaves mean:
- Reinforced health services
- Renovated schools and public buildings
- Urban redesign for climate resilience
So yes, climate has a financial cost. And pretending otherwise is just deferring the bill.
Happiness and consomption
WHAT CAN WE DO ?
Change our habits. Our relationship with nature. Our consumption.
Take the Vanuatu, a country among the most vulnerable to climate change (cyclones, volcanoes, rising seas) and one of the poorest economically. Yet it consistently ranks among the happiest countries on Earth, according to the Happy Planet Index.
Why? Because happiness there is decoupled from consumption. Rooted in social ties, nature, and simplicity.
Maybe our resilience also lies there: in reconnecting with what matters. In forging deeper, more joyful bonds with the living world—and with one another.
Change our habits. Our relationship with nature. Our consumption.
Take the Vanuatu, a country among the most vulnerable to climate change (cyclones, volcanoes, rising seas) and one of the poorest economically. Yet it consistently ranks among the happiest countries on Earth, according to the Happy Planet Index.
Why? Because happiness there is decoupled from consumption. Rooted in social ties, nature, and simplicity.
Maybe our resilience also lies there: in reconnecting with what matters. In forging deeper, more joyful bonds with the living world—and with one another.
What we need is Green
A PLANETARY SPIRAL
What happens here affects what happens elsewhere—and vice versa.
Bleached coral reefs in Australia or Mayotte reflect rising ocean temperatures. Urban CO₂ emissions drive acidification and disrupt marine ecosystems. Butterfly effect.
If we don't adapt our urban lifestyles, the spiral will continue. And the reminders from nature will only grow louder.
What happens here affects what happens elsewhere—and vice versa.
Bleached coral reefs in Australia or Mayotte reflect rising ocean temperatures. Urban CO₂ emissions drive acidification and disrupt marine ecosystems. Butterfly effect.
If we don't adapt our urban lifestyles, the spiral will continue. And the reminders from nature will only grow louder.
Invisible effect of our actions on nature
But another silent threat looms above us: the water crisis.
Less rainfall, strained aquifers, dried-up rivers. Extreme heat also means less water—for drinking, farming, healing. Mayotte, Spain, India, the southern US are already facing rationing. The real tipping point for humanity might not be temperature... but thirst. If we don’t anticipate this, it won’t just be our comfort at risk—it’s our stability. Our peace. Our humanity.
Should we continue supporting a system that encourages more births to fund pensions or feed consumer markets—when the planet itself is not growing? Or should we rethink the model, decouple well-being from demographics, and build a society whose wealth lies elsewhere?
Demography is a global issue, but that doesn’t prevent nations from leading by example. Some countries—through innovation, culture, or values—can act as moral compasses. We don’t have to wait. We can show that less can mean more—that happiness can thrive in simplicity.
Because the coral bleaching in Australia, Mayotte, or elsewhere is directly connected to what happens in the world’s major cities. Butterfly effect. And our responses—urban lifestyles, carbon emissions—are in turn accelerating ocean acidification, weakening marine ecosystems, triggering a downward spiral.
What we do here determines what survives there—and vice versa. Nature will remind us. Louder and louder.
We can tell ourselves that changing alone won’t matter. Or we can believe that each personal shift is the spark of a greater collective motion.
And let’s remember: ecology is neither left nor right. It shouldn’t be a political stance. It is our shared foundation. A vital, common ground that concerns us all.
Whatever your job, beliefs, or identity—we all have something to gain.
Let’s choose change. While we still can.
Less rainfall, strained aquifers, dried-up rivers. Extreme heat also means less water—for drinking, farming, healing. Mayotte, Spain, India, the southern US are already facing rationing. The real tipping point for humanity might not be temperature... but thirst. If we don’t anticipate this, it won’t just be our comfort at risk—it’s our stability. Our peace. Our humanity.
Should we continue supporting a system that encourages more births to fund pensions or feed consumer markets—when the planet itself is not growing? Or should we rethink the model, decouple well-being from demographics, and build a society whose wealth lies elsewhere?
Demography is a global issue, but that doesn’t prevent nations from leading by example. Some countries—through innovation, culture, or values—can act as moral compasses. We don’t have to wait. We can show that less can mean more—that happiness can thrive in simplicity.
Because the coral bleaching in Australia, Mayotte, or elsewhere is directly connected to what happens in the world’s major cities. Butterfly effect. And our responses—urban lifestyles, carbon emissions—are in turn accelerating ocean acidification, weakening marine ecosystems, triggering a downward spiral.
What we do here determines what survives there—and vice versa. Nature will remind us. Louder and louder.
We can tell ourselves that changing alone won’t matter. Or we can believe that each personal shift is the spark of a greater collective motion.
And let’s remember: ecology is neither left nor right. It shouldn’t be a political stance. It is our shared foundation. A vital, common ground that concerns us all.
Whatever your job, beliefs, or identity—we all have something to gain.
Let’s choose change. While we still can.
FAQ — Heatwaves & Hidden Costs
What is an urban heat island?
A city microclimate where built surfaces trap heat, raising temperatures versus rural areas. It increases cooling demand, health risks and infrastructure stress.
How do heatwaves impact the economy?
Reduced labor productivity, health costs, grid stress and damage to transport networks raise public and private expenses, with cascading effects on prices and taxes.
What helps cities adapt?
Trees and shade, cool roofs, permeable surfaces, early-warning systems, heat action plans, water access and design that prioritizes the most exposed people.
I sent a portfolio to a magazine Plongez and received the response: "You have beautiful photos, but a portfolio should have been taken at several different locations." Meaning: you need to travel.
The same magazine, through its editorial, praises our beautiful planet that must be preserved, but in reality, participates in mass tourism by selling advertising space to travel agencies specializing in trips to the other side of the world...
This leads me to a broader reflection. I see some photographers traveling across the globe in search of the "unique" shot, exploring Antarctica, the whales of Tonga, or the manta rays of Roca Partida. Ultimately, an "easy" photo, given how daily these places are touched by humans. But is this still true wildlife photography? These places are so crowded that nature has lost its raw character. By being immortalized so often, these locations have almost become movie sets, stages where wildlife has become accustomed to posing for humans.
The same magazine, through its editorial, praises our beautiful planet that must be preserved, but in reality, participates in mass tourism by selling advertising space to travel agencies specializing in trips to the other side of the world...
This leads me to a broader reflection. I see some photographers traveling across the globe in search of the "unique" shot, exploring Antarctica, the whales of Tonga, or the manta rays of Roca Partida. Ultimately, an "easy" photo, given how daily these places are touched by humans. But is this still true wildlife photography? These places are so crowded that nature has lost its raw character. By being immortalized so often, these locations have almost become movie sets, stages where wildlife has become accustomed to posing for humans.
And photography contests only fuel this mindset: winning awards in Raja Ampat, the Philippines, etc., to validate a portfolio that must absolutely be exotic... I admit, I’ve played that game myself. But in the end, I made a different choice: to stay on an island, limit my travels, and fully appreciate the lagoon, its dolphins, turtles, and corals… rather than chasing miles.
What’s the point of being offered a three-day trip to Raja Ampat when I can swim with dolphins, turtles, whales, and mantas right where I live? Why do these photographers, instead of valuing or denouncing the state of nature near them, end up playing along with this strange game orchestrated by a few magazines that need to sell advertising space?
What’s the point of being offered a three-day trip to Raja Ampat when I can swim with dolphins, turtles, whales, and mantas right where I live? Why do these photographers, instead of valuing or denouncing the state of nature near them, end up playing along with this strange game orchestrated by a few magazines that need to sell advertising space?
Is our role as photographers to showcase the beauty of the world, or to sell travel to distant lands that, in the end, would do without this mass tourism?
Well, I wanted to voice this complaint. Too bad for the magazine that rejected my photos because they come from the same location. And good for me, I can now save money on a magazine that’s gone from 4 to 12 euros in ten years... and stay true to my values.
Well, I wanted to voice this complaint. Too bad for the magazine that rejected my photos because they come from the same location. And good for me, I can now save money on a magazine that’s gone from 4 to 12 euros in ten years... and stay true to my values.
Coral Bleaching — Causes, Effects & How to Protect Reefs
Coral bleaching happens when corals lose their symbiotic algae under heat stress. This weakens reefs, threatens marine life, and harms coastal communities. Learn the main causes (including El Niño), the impacts, and what works to protect reefs.
Coral reefs, often referred to as the "rainforests of the sea," are among the most diverse and vital ecosystems on the planet. These living structures, formed by colonies of corals secreting calcium carbonate, host an incredible variety of marine life. More than just underwater decorations, corals play a crucial role in the health of the oceans by providing habitat for thousands of marine species, protecting coastlines from erosion, and supporting fishing and tourism, which are vital sources of income for many coastal communities.
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What are Corals and Their Role in the Marine Ecosystem?
Corals are marine animals belonging to the class Cnidaria, closely related to jellyfish and sea anemones. They live primarily in warm, clear waters of the tropics, forming reefs that can stretch for hundreds of kilometers. Their role in the marine ecosystem is multifaceted. They serve as a refuge and breeding ground for a wide range of marine creatures, including fish, crustaceans, and mollusks. Coral reefs also act as natural barriers, reducing the strength of waves and protecting shorelines from storms and erosion.
Beyond their ecological role, corals contribute to marine biodiversity. Their ability to recycle nutrients and maintain ecological balance in marine environments is essential for the survival of many marine organisms. Coral reefs are, therefore, both centers of biodiversity and crucial environmental regulators for the stability of ocean ecosystems.
Corals are marine animals belonging to the class Cnidaria, closely related to jellyfish and sea anemones. They live primarily in warm, clear waters of the tropics, forming reefs that can stretch for hundreds of kilometers. Their role in the marine ecosystem is multifaceted. They serve as a refuge and breeding ground for a wide range of marine creatures, including fish, crustaceans, and mollusks. Coral reefs also act as natural barriers, reducing the strength of waves and protecting shorelines from storms and erosion.
Beyond their ecological role, corals contribute to marine biodiversity. Their ability to recycle nutrients and maintain ecological balance in marine environments is essential for the survival of many marine organisms. Coral reefs are, therefore, both centers of biodiversity and crucial environmental regulators for the stability of ocean ecosystems.
El Niño, Coral Bleaching, and the Climate Crisis
However, these fragile structures are now threatened by both natural and human-induced factors, with the most alarming being the impact of ocean warming. One of the most devastating effects of warming is coral bleaching, a phenomenon where corals expel the symbiotic algae (zooxanthellae) that live inside their tissues. These algae provide the majority of the coral's energy through photosynthesis. Without them, corals turn white, become weakened, and struggle to survive without external intervention.
The El Niño phenomenon, which causes temporary ocean warming, exacerbates this issue. During these climatic events, water temperatures can rise significantly, causing intense thermal stress for corals. As a result, coral reefs can suffer severe damage, losing much of their biodiversity and impacting local populations that rely on the health of these ecosystems.
However, these fragile structures are now threatened by both natural and human-induced factors, with the most alarming being the impact of ocean warming. One of the most devastating effects of warming is coral bleaching, a phenomenon where corals expel the symbiotic algae (zooxanthellae) that live inside their tissues. These algae provide the majority of the coral's energy through photosynthesis. Without them, corals turn white, become weakened, and struggle to survive without external intervention.
The El Niño phenomenon, which causes temporary ocean warming, exacerbates this issue. During these climatic events, water temperatures can rise significantly, causing intense thermal stress for corals. As a result, coral reefs can suffer severe damage, losing much of their biodiversity and impacting local populations that rely on the health of these ecosystems.
Key facts — Coral bleaching
- Trigger: sustained heat stress → loss of symbiotic algae (bleaching).
- Drivers: marine heatwaves, El Niño, poor water quality, extreme light.
- Effects: reduced growth, disease, mortality, lost habitat for reef fish.
- Recovery: cooler temps, clean water, and time between heat events.
- What helps: cut emissions, improve water quality, reef-safe tourism.
What Are Scientists Doing to Combat Coral Bleaching?
In the face of this crisis, scientists worldwide are working tirelessly to save coral reefs. Their approach combines laboratory research, field monitoring, and innovative strategies for reef restoration.
One promising solution is coral breeding in laboratories. Researchers have developed methods to cultivate heat-resistant corals. By crossbreeding different coral species or exposing larvae to higher temperatures, they hope to create corals that are more resilient and capable of surviving in warmer waters. These corals can then be transplanted into declining reefs as part of restoration programs.
Scientists also monitor reef conditions in real-time, using underwater sensors to measure water temperature and coral health. This data allows for rapid alerts to authorities and local communities, enabling protective measures, such as marine protected areas or activity restrictions, to be implemented.
On a global scale, coral protection and restoration initiatives are also supported by international organizations and governments, working to reduce greenhouse gas emissions, plastic pollution, and overfishing—three major factors contributing to coral decline.
While these efforts provide hope for restoration, the situation remains urgent. Coral reefs, these biodiversity treasures, continue to suffer under the combined effects of climate change and pollution. Scientific solutions, though promising, can only succeed if accompanied by collective action to combat climate change. Protecting corals has become a global challenge, a test for humanity's ability to safeguard the natural wonders that connect us to our planet.
In the face of this crisis, scientists worldwide are working tirelessly to save coral reefs. Their approach combines laboratory research, field monitoring, and innovative strategies for reef restoration.
One promising solution is coral breeding in laboratories. Researchers have developed methods to cultivate heat-resistant corals. By crossbreeding different coral species or exposing larvae to higher temperatures, they hope to create corals that are more resilient and capable of surviving in warmer waters. These corals can then be transplanted into declining reefs as part of restoration programs.
Scientists also monitor reef conditions in real-time, using underwater sensors to measure water temperature and coral health. This data allows for rapid alerts to authorities and local communities, enabling protective measures, such as marine protected areas or activity restrictions, to be implemented.
On a global scale, coral protection and restoration initiatives are also supported by international organizations and governments, working to reduce greenhouse gas emissions, plastic pollution, and overfishing—three major factors contributing to coral decline.
While these efforts provide hope for restoration, the situation remains urgent. Coral reefs, these biodiversity treasures, continue to suffer under the combined effects of climate change and pollution. Scientific solutions, though promising, can only succeed if accompanied by collective action to combat climate change. Protecting corals has become a global challenge, a test for humanity's ability to safeguard the natural wonders that connect us to our planet.
FAQ — Coral Bleaching
What is coral bleaching?
It’s the loss of symbiotic algae (Symbiodiniaceae) from coral tissue under stress, making corals turn white and become vulnerable.
What causes bleaching?
Marine heatwaves, El Niño events, poor water quality, and extreme light. Prolonged stress can lead to coral death.
How can we protect reefs?
Cut local pollution, manage fisheries, reduce physical damage, support restoration, and reduce emissions driving ocean warming.
Serge Melesan
Underwater & Fine Art Ocean Photographer
Underwater & Fine Art Ocean Photographer
Specialist in Fine Art Ocean Photography. Published in Oceanographic Magazine & Earth.org. National Geographic Traveller – Portfolio Winner (2023).
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