The study, published in The Journal of Cleaner Production, describes the new ‘pressurised spinning’ innovation and its potential to create cellulose materials more cheaply and cleanly than some current manufacturing methods, using a waste product from the dairy farming industry, cow dung, as the raw material.

The advance is the first time that manufacturing-grade cellulose has been derived from animal waste and is a prime example of circular economy, which aims to minimise waste and pollution by reusing and repurposing resources wherever possible.

The researchers say that implementing the technology would be a win-win situation for manufacturers, dairy farmers and the environment.

Cellulose is one of the world’s most commonly used manufacturing materials. Found naturally in the cell walls of plants, it was first used to create synthetic materials in the mid-19^th century, including the original material used in photographic film, celluloid.

Today it can be found in everything from cling film to surgical masks, paper products, textiles, foods and pharmaceuticals. Though it can be extracted organically, it is also often produced synthetically using toxic chemicals.

Pressurised spinning (or pressurised gyration) is a manufacturing technology that uses the forces of pressure and rotation simultaneously to spin fibres, beads, ribbons, meshes and films from a liquid jet of soft matter. The multiple award-winning technology was invented in 2013 by a team from UCL Mechanical Engineering led by Professor Mohan Edirisinghe.

Professor Edirisinghe, the senior author of the study, said: “Our initial question was whether it could be possible to extract the tiny fragments of cellulose present in cow manure, which is left over from the plants the animals have eaten, and fashion it into manufacturing-grade cellulose materials.

“Extracting the fragments from dung was relatively straightforward using mild chemical reactions and homogenisation, which we then turned into a liquid solution. But when we tried to turn the fragments into fibres using pressurised spinning technology, it didn’t work.

“By a process of trial and error, we figured out that using a horizontal rather than a vertical vessel containing surface nozzles and injecting the jet of liquid into still or flowing water caused cellulose fibres to form. We were then able to change the consistency of the liquid to create other forms, such as meshes, films and ribbons, each of which have different manufacturing applications.

“We’re still not quite sure why the process works, but the important thing is that it does. It will also be fairly easy to scale up using existing pressurised spinning technology, the vessels for which were designed and built in the UCL Mechanical Engineering workshop.”

The new technique, called horizontal nozzle-pressurised spinning, is an energy efficient process that doesn’t require the high voltages of other fibre production techniques such as electrospinning.

The team say that adapting existing pressurised spinning machines to the new process should be relatively straightforward. The greater challenge is likely to be the logistics of sourcing and transporting the raw material, cow dung, but that the environmental and commercial benefits of doing so would be significant.

Ms Yanqi Dai, first author of the study from UCL Mechanical Engineering, said: “Dairy farm waste such as cow manure is a threat to the environment and humans, especially through waterway pollution, the release of greenhouse gases into the atmosphere when it decomposes, and the spread of pathogens. It is also often a burden on farmers to dispose of properly.

“Horizontal nozzle-pressurised spinning could be a huge boost to the global dairy farming industry, by putting this problematic waste product to good use and perhaps creating a new source of income.”

The research team is currently seeking opportunities to work with dairy farmers to take advantage of the technology and scale it up.

Animal waste is a growing problem globally. Research in 2019 estimated that the amount of animal waste is due to increase by 40% between 2003 and 2030 to at least five billion tons, with many farms producing more manure than they can legitimately use as fertiliser. This waste often finds its way into water, where it can have a devastating effect on ecosystems and even lead to disease in humans.

Core pressurised spinning research at UCL was made possible by grants awarded by UK Research and Innovation (UKRI).

The study assesses the contribution of the highest emitting groups within societies and finds that the top 1% of the wealthiest individuals globally contributed 26 times the global average to increases in monthly 1-in-100-year heat extremes globally and 17 times more to Amazon droughts.

The research sheds new light on the links between income-based emissions inequality and climate injustice, illustrating how the consumption and investments of wealthy individuals have had disproportionate impacts on extreme weather events. These impacts are especially severe in vulnerable tropical regions like the Amazon, Southeast Asia, and southern Africa — all areas that have historically contributed the least to global emissions.

“Our study shows that extreme climate impacts are not just the result of abstract global emissions, instead we can directly link them to our lifestyle and investment choices, which in turn are linked to wealth,” explains lead author Sarah Schöngart, an alumna of the 2024 Young Scientists Summer Program (YSSP), who is currently associated with ETH Zurich. “We found that wealthy emitters play a major role in driving climate extremes, which provides strong support for climate policies that target the reduction of their emissions.”

Using a novel modeling framework that combined economic data and climate simulations, the researchers were able to trace emissions from different global income groups and assess their contributions to specific climate extremes. They found that emissions from the wealthiest 10% of individuals in the United States and China alone, each led to a two-to threefold increase in heat extremes across vulnerable regions.

“If everyone had emitted like the bottom 50% of the global population, the world would have seen minimal additional warming since 1990,” says coauthor Carl-Friedrich Schleussner, who leads the Integrated Climate Impacts Research Group at IIASA. “Addressing this imbalance is crucial for fair and effective climate action.”

The study also emphasizes the importance of emissions embedded in financial investments, rather than just personal consumption. The authors argue that targeting the financial flows and portfolios of high-income individuals could yield substantial climate benefits.

“This is not an academic discussion — it’s about the real impacts of the climate crisis today,” adds Schleussner. “Climate action that doesn’t address the outsize responsibilities of the wealthiest members of society, risks missing one of the most powerful levers we have to reduce future harm.”

The authors suggest that their findings could motivate progressive policy instruments targeted at societal elites, noting that such policies can also foster social acceptance of climate action. Making rich individual polluters pay can also help to provide much needed support for adaptation and loss and damage in vulnerable countries. They conclude that rebalancing responsibility for climate action in line with actual emissions contributions is essential, not just to slow global warming, but to achieve a more just and resilient world.

The study is the result of work undertaken as part of Schöngart’s YSSP project in 2024 for which she was awarded the IIASA Levien award.

In a multi-study paper published in the International Journal of Retail and Distribution Management, a team of researchers has delved into the growing phenomenon of e-fashion — digital garments worn in virtual environments — and found these intangible items could help bridge the gap between fast fashion and environmental sustainability.

From Instagram filters to gaming skins, the idea of digital self-presentation isn’t new. But fashion brands are now taking things a step further, offering digital-only collections that exist purely on-screen.

These clothes can change colour, morph shape, and even communicate with physical counterparts via near-field communication (NFC) chips. Crucially, they come without the environmental baggage of traditional production, shipping or waste. Their production, consumption and disposal don’t require using raw and difficult-to-recycle materials such as polyester. The research studied how consumers respond to the unique appeal of digital clothing and what drives their willingness to pay for garments they can’t physically touch, try and own.

Findings show that consumers with a strong appetite for novel and tactile experiences are particularly drawn to e-fashion, valuing its creativity, customisability and interactivity. For them, virtual couture is not a compromise but an additional new frontier in personal style.

Conventional logic suggests that consumers with a strong need for touch, who enjoy physically inspecting and trying on a garment, are less likely to find e-fashion appealing.

However, the research challenges this logic. It learns that consumers with a high need for touch, and a high sensation-seeking, are an ideal target market for virtual clothing.

The research found that consumers could mentally simulate the tactile features of e-fashion, a process that becomes increasingly feasible and vivid with the adoption of virtual reality headsets.

One of the co-authors, Dr Kokho (Jason) Sit, Senior Lecturer in Marketing at the University of Portsmouth, said: “Whether e-fashion is a fleeting fad or a long-lasting trend remains to be seen, but its environmental potential is undeniable. Unlike fast fashion’s reliance on low-cost, often non-recyclable materials and landfill-heavy turnover, digital garments can be produced, consumed, and discarded with a single keystroke — or perhaps several keystrokes. No raw materials, modern slavery, shipping and delivery are involved, reducing deforestation, inhumane working conditions, carbon footprint and landfills.”

“This research shows that e-fashion isn’t just a gimmick for gamers or influencers. It can potentially disrupt the fast fashion model in a profitable way for fashion brands, exciting for consumers and better for the planet.”

While it may not entirely replace physical fashion, the study suggests e-fashion could meaningfully reduce our reliance on high-volume, low-value clothing and help curb the environmental toll of an industry that urgently needs reform.