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Tag: planet pioneers

  • Polluted Lakes Are Being Cleansed Using Floating Wetlands Made of Trash

    Polluted Lakes Are Being Cleansed Using Floating Wetlands Made of Trash

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    When Pradhanang found a trash mix that could be fashioned into a platform and resist breaking down with age, she began talking to her colleagues in Nepal. By 2021, they had secured $78,000 in funding from the Asia-Pacific Network for Global Change Research, a research and policy funder, to operate a study across Nepal, India, and Bangladesh.

    While Nagdaha and the Indian and Bangladeshi sites do not provide residents with drinking water, they do have cultural and religious significance. On her many visits to Nepal, Pradhanang has seen children swimming in Nagdaha’s murky water, dogs lapping at the shore, and women sitting on the banks to wash dishes and clothing. Pradhanang and The Small Earth Nepal wanted to beautify the lake as they cleaned it. They chose flowering plants that served both purposes: Indian shot (Canna indica) and scarlet sage (Salvia splendens), whose bright red flowers stand out against the gray water.

    After installing the floating platforms in the fall of 2022, the researchers tested the water monthly and found results consistent with their lab trials, which showed a 99 percent reduction in nitrate levels, 80 percent reduction in phosphates, 56 percent reduction in iron, and 55 percent reduction in ammonia. Dissolved oxygen concentrations increased by half. Their results have been submitted to the Journal of Civil Engineering for review.

    Growing flowering plants can add aesthetic value to a body of water, but the collaboration is staying away from growing food on the platforms, since the plants build up such high concentrations of pollutants. But people aren’t the only ones intrigued by the floating wetlands; geese and ducks flock to the mats, sitting on the platforms and pooping phosphorus-rich excrement into the water.

    Pradhanang came up with a clever solution for the mischievous mallards: She tied silver ribbons around the stems of the plants, whose sharp glare drove away the birds. Though the scientists don’t want geese on the FTWS, pollinators like bees and small birds are more than welcome—as are the diverse microbial life-forms that exist on the plant roots and digest pollutants in the water for energy.

    “There’s a real kind of, ‘If you build it, they will come’ phenomenon that’s associated with the floating wetlands,” says Max Rome, who did his PhD on FTWS in Boston’s Charles River and now works at the Charles River Watershed Association. “These systems are really effective for creating wetland biodiversity in a place where there’s just not room for wetlands.”

    Though the trash-based systems solve some water-pollution problems, they leave others—namely, microplastics. Incorporating local trash into the mats shouldn’t make things worse overall—much of the trash is gathered from the water in the first place—but high plastic content in the water means that it can remain a risk to locals’ health, even after cleansing.

    While Pradhanang and outside researchers have flagged concerns about incorporating styrofoam and other plastics into the trash-based FTWS, they say that the benefits of the mats generally outweigh the costs. “If you can use a waste product that would then just be normally in the water,” says White, “and you can use it to make a product that is actually helping to clean the water, it’s amazing.”

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    Hannah Richter

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  • The Undersea Art Gallery That Ensnares Illegal Trawlers

    The Undersea Art Gallery That Ensnares Illegal Trawlers

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    As a carbon sink, seagrass has other advantages too. It’s unlikely to catch fire and release large quantities of carbon back into the atmosphere at once, for example. But it is vulnerable to other threats. Increased coastal erosion can muddy the waters, making it more difficult for Posidonia to photosynthesize. Cruise ships dropping anchor can cause untold damage. And, of course, bottom-trawlers can ravage thousand-year-old meadows in a matter of minutes. 

    Drag-net trawling causes most damage to the plant itself, says José Miguel González-Correa, a professor in marine sciences at the University of Alicante, in Spain. But drag nets can easily damage the matte too, he says, causing “carbon to be released by bacterial action, and increasing CO2 levels.” Restoring Posidonia meadows can be a long process, he says. In a paper comparing trawler-damaged meadows to their healthy neighbors, he estimates they might take as much as 100 years to recover fully. Preservation, he concludes, is better than restoration, and creating anti-trawling reefs—by sinking well-spaced obstacles like Paolo Fanciulli’s Casa dei Pesci sculptures—is one of the simplest and most cost-effective ways of protecting Posidonia

    DESPITE ALL THESE recent scientific studies backing up his approach, however, Fanciulli has never received any government funding. In fact, he’s universally scathing about those in authority, lambasting the EU for its fishing subsidies, which he claims only encourage bad practices, and lampooning the local coastguard for their inability—or unwillingness—to enforce the laws against bottom trawling. “They do nothing,” he says.

    On occasion in the 1990s, he said, he took it on himself to police the waters off Talamone. “The coastguard always used to use a big light on their boats, so what did I do? I put one on my boat,” he chuckles. “Think about it, three in the morning, you’re fishing illegally, you see a light coming towards you, what would you do? You’d run away.” And they did, he says, but they’d always come back—until he started sinking his statues. Casa dei Pesci has now placed enough anti-trawling obstacles to reach from Porto Santo Stefano to the Ombrone River—a distance of some 20 nautical miles, or 37 km—meaning that some 137 km2 of Posidonia meadow and fish habitat are now protected. “It’s small,” says Fanciulli. But it’s still remarkable given the lack of any official backing or funds. 

    “What we do here, we do entirely with the money that we raise and donations,” says Fanciulli. Early on in the project’s genesis, after sinking a few test blocks of concrete, he was lucky enough to meet the director of the Cave di Michelangelo, the quarry where the famous Florentine sculptor sourced his stone. “I asked him to give me two blocks of marble. He gave me 100.” 

    The sculptors, similarly, were friends of friends who offered their time to the cause for free. “Initially, there were five main artists, but the project quickly grew,” explains Giorgio Butini, an artist whose work now sits on the seabed. An established sculptor from Florence, he would normally expect to sell a comparably sized work for between €50,000 and €60,000 ($49,500–$59,500), but he has been happy to contribute several pieces. His latest, called Giovinezza (or “Youth”), is the first of a planned three-part series called Past, Present, Future that Casa dei Pesci is currently crowdfunding to put into place further up the coast—because while the sculptors might offer up their time and tools for free, moving the sculptures around isn’t cheap.

    British sculptor Emily Young, arguably the best known of the artists internationally, was introduced to Fanciulli because she owns a studio nearby. Initially, she was impressed by his energy and enthusiasm. “He’s really, really focused, he’s sort of heroic. I think he sleeps almost no hours,” she says. But she was also fascinated, on an artistic level, by the gallery’s longer-term legacy and what the sculptures will say to future generations. “That’s something I think about a lot in my work. When you work with stone, you’re leaving something for the future,” she says. “We’re altering the Earth very profoundly, and some of the things we’re leaving are very destructive—but they can also be very beautiful and poignant.” 

    She hopes that, “in the fullness of time, people won’t even know what these sculptures were. They will be covered in plants and Posidonia—and that will be the sign that the project is working.” In the shorter term, there’s no doubt her work has helped raise the profile of Fanciulli’s cause. “Already I get emails from people saying: ‘We’re going on a dive, can you tell us more about your sculptures so we know what we’re looking at?’” says Young. And as more and more artworks have been added to the gallery, word of the project has spread. Recently, the outdoor clothing brand Patagonia decided Casa dei Pesci met its high standards for grant recipients, and awarded a grant of €13,000 ($12,800). A German charitable foundation has promised €15,000 ($14,800). But most of the money still comes from fundraisers that Fanciulli runs himself. 

    ON AN UNSEASONABLY warm Sunday at the end of October, Fanciulli can be found sweating through his camouflage T-shirt while he mans three BBQs at once. The previous night’s catch—amberjack, dolphin fish, some red snapper—is being grilled fresh off the boat, with a simple mix of salt and rosemary, for the 40 guests who have paid to join the fundraiser and enjoy a delicious three-course meal in the process.

    Although ably assisted by his wife in the kitchen, his daughter at the tables, and a couple of friends, Fanciulli still seems to be doing everything—flipping the fish, pouring the wine, and chatting with his guests about his next initiative: a home for octopuses, made up of a gallery of hand-painted amphora—narrow Roman jars with handles and pointed bottoms. The only time he stops is to give his presentation, showing photos of broken Posidonia stems and the havoc wreaked by bottom trawlers. Seated at long tables, his guests are listening rapt as he tells them: “If you want to eat well, you have to defend the environment. It’s like a war.” 

    As the lunch wraps up and his guests depart, Fanciulli finally sits down. There were times over the past 30 years, he admits, where he’d felt like he was fighting a lonely, losing battle. “I’ve been threatened by trawlers, I’ve been threatened by institutions, but I always told the truth. For a long time, no one listened to me,” he says, but now, with public opinion swinging behind him, both locally and internationally, his message finally seems to be getting through.


    Reaching net-zero emissions by 2050 will require innovative solutions at a global scale. In this series, in partnership with the Rolex Perpetual Planet initiative, WIRED highlights individuals and communities working to solve some of our most pressing environmental challenges. It’s produced in partnership with Rolex, but all content is editorially independent. Find out more.

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    Tristan Kennedy

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  • Flooding Wetlands Could Be the Next Big Carbon Capture Hack

    Flooding Wetlands Could Be the Next Big Carbon Capture Hack

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    Powered by solar energy, these bores have had just as much effect as the original breaching of the bund, but they’re not subject to the same climatic vicissitudes. As a result, the saltwater wetlands are flourishing.

    “Before the bores, the wetlands were more than half-infested in weeds,” says Kennedy from BirdLife Australia. Now, tens of thousands of native blue water lilies bloom, and bird life is flourishing. Latham’s snipe and the sharp-tailed sandpiper—both species under threat—are thriving in the swamp. One of the most exciting discoveries has been the spotting of a painted snipe, one of Australia’s rarest waterbirds.

    Many of these waterbirds are migratory, traveling from as far afield as Siberia and Japan. “It’s like opening up a new hotel for them,” Kennedy says. As a result, Mungalla is listed as a nationally significant location for migratory shorebirds. A knock-on effect is that the revitalized wetlands are now attracting large numbers of tourists, particularly birdwatchers keen for a glimpse of some of the rarer water birds.

    For the Nywaigi people, this return of their traditional lands to health has both cultural and economic significance. Cassady says many of the area’s creeks—including Palm Creek, which runs through the Mungalla wetlands—are part of Nywaigi songlines, Aboriginal walking routes across the country that connected important features and locations. “Aboriginal people have looked after this country. We’ve got ancient campsites that are still there on those seabeds,” he says. The local elders still recall a time when the birdlife was so plentiful that the sky was dark with magpie geese.

    Local Nywaigi young people are being trained as rangers and participating in programs such as water quality testing on the wetlands, which is providing job opportunities and a vital connection to the country. “Land is so important to Aboriginal people,” Cassady says. “If they haven’t got their land, if they haven’t got their culture, they’re just lost.”

    IN ADDITION TO boosting ecotourism, the revitalized wetlands are providing a unique opportunity for the development of a carbon credit business. Restoring Mungalla’s native landscape sequesters carbon dioxide both through reforestation on land and in the soils and sediments of the wetlands and mangroves. That sequestered carbon can be accounted for and then traded on the carbon markets as credits to offset emissions elsewhere.

    “By removing that saltwater bund, you bring salt water back in and you change that vegetation to the mangroves and the melaleucas,” Wearne says. Those restored marine ecosystems sequester carbon much more efficiently than what was there before, and much more efficiently than terrestrial ecosystems. However, the challenge here—and for many other blue carbon projects—is how to measure and account for the sequestration of carbon dioxide, as well as all of the co-benefits of restoring the wetlands: improving the reef, providing habitat for commercially important fish species, creating jobs, and honoring Indigenous heritage.

    To help with that, the federal government has stepped in. Mungalla is one of five projects to be awarded funding via the newly elected federal government’s Blue Carbon Ecosystem Restoration Grants, which aim to increase investment in blue carbon conservation, restoration, and accounting. The nearly AU$1.78 million (around $1.22 million) investment is aimed at addressing the tricky question of how to properly account for all of Mungalla’s benefits—climate, biodiversity, and social—with a view to bringing its blue carbon credits to market.

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    Bianca Nogrady

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