Protecting the World’s Largest Geyser Ecosystem with Recycled Tires

October 17, 2017

October 17, 2017


Among the uses for recycled tires is pavement. Today’s NERC Blog article by Lauren Davis, Public Relations Coordinator at Michelin, talks about a recent project using recycled tires at Yellowstone National Park.


Yellowstone National Park has completed the second phase of its initiative to install more eco-friendly walkways in the world’s largest concentration of geysers and thermal features. With help from the Michelin Corporate Foundation, Yellowstone National Park has so far paved 11,100 square feet of pathway with the recycled material, replacing crumbling asphalt paths.


The new walkways are made from an innovative eco-friendly paving material that is manufactured in part from recycled tires. This new material will help reduce run-off and erosion in the eco-sensitive Yellowstone Geyser Basin, which features the iconic Old Faithful geyser and attracts millions of visitors a year.


The recycled tire pavement is called KBI Flexi®-Pave. This product provides a porous, durable and flexible surface that allows the water from rain and snow to percolate through the walkway the way it would have done before the walkways were installed. This in turn creates more natural water patterns that eventually replenish the geyser basin. Unlike asphalt, this paving material does not create significant storm-water runoff or leach pollutants into the soil. It also does not break apart, which prevents material from ending up in geysers and hot springs.


Some 2,400 tires were donated for the project, with this second phase using 1,536 end-of-life tires to help create thousands of square feet of paths. Most of these tires were originally donated several years ago by Michelin for use on Yellowstone’s more than 800 fleet vehicles and commercial equipment. A total of $1.5 million in donations and in-kind have been used thus far for the project. Around 1,500 volunteer hours have been logged on the pathway project.


Flexi-Pave not only provides an environmentally friendly solution for the Old Faithful area, it prevents thousands of old tires from ending up in a landfill or being burned for fuel. The project was made possible through a partnership between Yellowstone National Park, park concessioners, the Yellowstone Park Foundation, KBI Industries and the Michelin Corporate Foundation.


“The Yellowstone Walkways Project aligns with Michelin’s commitment to being a global leader in sustainable mobility,” said Leesa Owens, director of community relations for Michelin North America. “Our employees have been involved with this project from the start, working directly to help create environmentally friendly walkways out of Michelin tires that had already provided Yellowstone with years of cost-effective and fuel-efficient operations.”


Flexi-Pave is made of rubber granules and stone held together by a polymer binding agent that is inert when cured. Its open-pore design enables fast evacuation of up to 4,000 cubic inches of water per hour. Beyond Yellowstone, this innovative product has a broad range of applications. The thousands of rubber granules making up its surface make it non-slip and it is an ADA-compliant surface accessible to wheelchairs and walkers. The integrity of the materials are not affected by freeze-thaw conditions which is why it works well in cold and snowy parts of the Northeastern and Midwestern United States.


 “Yellowstone is the world's first national park with nearly 150 years of balancing the protection of natural wonders and sharing them with visitors,” said Lynn Chan, a landscape architect for the National Park Service and lead on sustainability at Yellowstone National Park. “It is important to us to rehabilitate the park’s walkways with materials that can help protect this sensitive environment yet still allow visitors to see and appreciate it.”


“This project represents the model for collaboration between public and private organizations. We hope that this eco-friendly park walkway will inspire other similar projects that help preserve natural systems,” said Jeff Augustin, vice president of external partnerships at Yellowstone Park Foundation.


By Lauren Davis, Public Relations Coordinator at Michelin


Dedicated to the improvement of sustainable mobility, Michelin designs, manufactures and sells tires for every type of vehicle, including airplanes, automobiles, bicycles, earthmovers, farm equipment, heavy-duty trucks and motorcycles. The company has earned a long-standing reputation for building innovative premium tires. In addition to tires, the company also publishes travel guides, hotel and restaurant guides, maps and road atlases. Headquartered in Greenville, S.C., Michelin North America employs about 22,700 and operates 19 major manufacturing plants.

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By Sophie Leone July 13, 2026
Sustainable Generation (SG) is an industry leader in composting innovation. Their team brings together over 200+ years of collective experience, working together to deliver scalable systems and produce high-quality compost. SG ADVANCED COMPOSTING™ Technology has been rigorously vetted and received independent third-party validation. Their technology is designed to reduce risk, optimize operational outcomes, and exceed environmental benchmarks. At SG “performance isn't just efficiency – its environmental responsibility” and that shows in the work they do and the technology they produce. Sustainable Generation leads with a climate-start approach that allows them to perform at a high level in all aspects. Their composting technology impact can be seen in the >95% VOC reduction, validated in the field and certified by air distributors; stormwater protection, zero-contact cover design; GHG mitigation, reducing methane by 80% compared to organic waste going to landfill and more. They're committed to the industry in a multitude of ways, engaging with local and global stakeholders. SG continues to lead by example, share best practices, and contribute to policy development. NERC is excited to welcome Sustainable Generation to our ever-expanding organics management community. We look forward to supporting their mission rooted in climate resilience and the immensely impactful work they are doing. For more information on Sustainable Generation visit.
By Megan Quinn | WasteDive July 8, 2026
A resurgence of secondhand shopping, new sorting methods and policy initiatives are all poised to help shift the needle on textile waste, speakers at a NERC webinar said. Thrift stores are a first line of defense against textile waste, and changing attitudes about thrifting and resale could help shape recycling systems and divert more material from landfills in coming years, said speakers at the Northeast Recycling Council’s material reuse forum webinar on Tuesday. Secondhand clothing is playing a powerful role in U.S. textile export markets, which in turn influences how and when textiles end up in recycling streams, said executives from thrift stores and researchers from the National Institute for Standards in Technology. A rising interest in thrifting, upcycling and clothing repair could help keep clothing in use longer, and when textiles are too worn out to wear, newer sorting technologies could help sort end-of-life textiles more effectively for better end markets, they said. Here’s a few takeaways from the webinar: Thrift stores: making landfill diversion look cool Thrifting is not a new concept, but Americans have become more and more receptive to thrifting in recent years due to a combination of rising expenses, tariff concerns and economic uncertainty. There’s also the lasting effects of the COVID-19 pandemic, when people had more time to look through their closets for unwanted items to donate, said Giana Manganaro Cronin, associate director of retail for More Than Words, a nonprofit youth job training program in the Boston area. More Than Words uses its thrift stores as a key way to offer job training and provide stable jobs for the youth who participate in the program, she said. The organization used to sell used books, but a fresh wave of interest in secondhand shopping spurred by the pandemic prompted the nonprofit to switch to a thrift store model instead. “This was not only a crucial pivot for the environment and to keep more things out of the landfill, but also do well for our business and our young people too,” she said. The nonprofit’s thrift stores, called Boomerangs, offer a 98% margin compared to its previous 62% retail bookstore model, and Manganaro Cronin expects that to continue in coming years. Gen Z shoppers are leading the trend, in part because reducing their environmental footprint is a core value for the demographic, she said. About 64% of shoppers in that age range look at resale options before buying new products, she said. Young shoppers are expected to continue influencing this trend, said Uli Stosch, chief officer of strategic development for Planet Aid, a thrift store nonprofit that has collected and reused more than 2 billion pounds of clothing since its inception in 1997. Citing numbers from an annual resale report prepared by online thrift company ThredUp, she added that the U.S. secondhand apparel market grew 14% in 2024, and the market is anticipated to reach $74 billion by 2029. The next step: Labor-intensive export and recycling markets More Than Words and other thrift stores like it does its best to sell as many items as possible. But for items that can’t sell, the organization often partners with secondary buyers, such as wholesalers who have access to a broad range of additional secondhand markets, Manganaro Cronin said. Stosch said thrift stores and other secondhand stores typically sell between 10% and 50% of their items, and a “small amount’ ends up going in the trash — mostly soiled items not fit for wearing or using. Another portion gets classified as “mixed rags” and baled for export, where they are further sorted for more reuse, resale or recycling purposes, she said. Many of these bales end up in Pakistan and Malaysia, where workers are trained to go through the time-consuming process of hand sorting each piece to separate out the quality clothes for resale while setting aside lower-quality textiles for other uses. “It’s very, very labor intensive to do this. You stand for long hours and have to pick through all the right things,” she said. Because it takes so much time to sort these items correctly, “there’s a limit to how much textiles we can process this way,” she said. From there, many of the clothes destined for resale go to countries in Africa, the Caribbean and Central America. More than 1.5 billion people around the world rely on second-hand clothing, she said, especially as an alternative to low-quality fast fashion brands. Guatemala has a particularly strong secondhand import market, she said. A 2025 study from Full Cycle Resource noted that the country imported 290 million pounds of clothing in 2023 and reused more than 91% of it, with women-owned clothing stores making up more than half of the industry. Complex streams, complex recycling options When clothing or textiles are too worn out or unfit to be worn again, and have already been downgraded to be used as rags or industrial cloth, recycling is one of the next best options. That’s when a new set of challenges kick in, said Katarina Goodge, a materials research engineer at NIST. Textiles are a complex and challenging waste stream to sort, in part because there are no set standards on how to handle the materials today, she said. Setting standards “would help scale up in efficiency in this system,” she added. Another problem: Textile sorting is largely done by hand, as opposed to other recycled materials that can quickly be sorted by a range of AI-enabled robotic sorting technologies, Goodge said. One reason hand sorting is the norm is because it’s tough to tell exactly what a garment is made of. “We need to know the fiber content to know how to recycle that garment,” she said, but the tag inside might simply say it’s made of 95% rayon and 5% “other.” A particularly itchy tag might get cut out of the garment entirely. “We need to look at a more systematic and technological solution to this,” she said – and technology is catching up. Handheld near-infrared devices can give insight into a garment’s material makeup, and when paired with AI or machine learning models, identifying fiber contents can become faster and more efficient. A handheld NIR scanner could be paired with hand sorting to guide garments into the right bins, Goodge said, and larger-scale solutions might be able to identify textiles while they’re on a conveyor belt, with a robotic arm component to pick off specific items. In the U.S., textile recycling infrastructure is not as common as recycling systems for curbside materials, though some companies have invested in such technology in recent years. A future of reuse, repair and policy change Legislation could make a difference in textile recycling initiatives in coming years, the speakers said. California’s extended producer responsibility for textiles law is in the process of being implemented, which will prompt more outlets for clothing donation, repair and recycling, Stosch said. Countries in the EU are also on the hook to implement similar textile EPR programs. Meanwhile, disposal bans in states like Massachusetts have prompted both thrift stores and lawmakers to wonder what to do with textiles that aren’t fit for resale but could be recycled into other products, Stosch said. Most thrift stores will accept apparel that’s torn or missing buttons, as long as it’s clean: “If it’s clean, it can be made into something else.” There’s also more room for creative ways to reuse or repair clothing before it goes to a recycling center, speakers added. For example, community repair events are good ways to teach basic sewing skills and inspire people to make something new with old apparel, Goodge said. “We used to have some infrastructure in the U.S. for repair, and that has largely sort of gone away, because it’s really hard to keep that economically viable,” she said. Yet repair efforts “have a huge potential to keep a lot of these garments as garments.” Read on WasteDive.
By IndexBox July 8, 2026
Thrift stores act as a frontline barrier against textile waste, and shifting consumer perspectives on thrifting and resale could help refine recycling systems and pull more material away from landfills in the years ahead, according to panelists at a Northeast Recycling Council material reuse forum webinar held on Tuesday. Executives from thrift stores and researchers from the National Institute for Standards and Technology pointed out that secondhand clothing holds a strong position in U.S. textile export markets, which in turn shapes how and when textiles reach recycling streams. A rising enthusiasm for thrifting, upcycling, and clothing repair could extend the useful life of garments, and when textiles become too worn for wear, emerging sorting technologies could more efficiently handle end-of-life textiles to improve end markets, they noted. Thrift Stores: Making Landfill Diversion Attractive Thrifting is not a novel idea, but Americans have grown increasingly open to it in recent years due to a mix of rising costs, tariff worries, and economic instability, along with lingering effects of the COVID-19 pandemic, when people had extra time to sort through their closets for items to donate, said Giana Manganaro Cronin, associate director of retail for More Than Words, a nonprofit youth job training program based in the Boston area. More Than Words leverages its thrift stores as a primary means to deliver job training and secure stable employment for participating youth, she explained. The organization previously sold used books, but a surge in interest in secondhand shopping triggered by the pandemic led the nonprofit to adopt a thrift store model instead. This shift was not only vital for the environment and for keeping more items out of landfills, but also beneficial for the business and the young people involved, she said. The nonprofit's thrift stores, known as Boomerangs, achieve a 98% margin compared to the previous 62% margin from its retail bookstore model, and Manganaro Cronin anticipates this trend will persist. Gen Z shoppers are driving this movement, partly because minimizing their environmental impact is a fundamental value for that group, she noted. About 64% of shoppers in that age bracket explore resale options before purchasing new items, she added. Young consumers are expected to keep shaping this trend, said Uli Stosch, chief officer of strategic development for Planet Aid, a thrift store nonprofit that has gathered and reused over 2 billion pounds of clothing since its founding in 1997. Drawing on data from an annual resale report by online thrift company ThredUp, she noted that the U.S. secondhand apparel market expanded by 14% in 2024 and is projected to hit $74 billion by 2029. Labor-Intensive Export and Recycling Markets More Than Words and similar thrift stores strive to sell as many items as possible, but for unsellable goods, the organization frequently collaborates with secondary buyers such as wholesalers who have access to a wide array of additional secondhand markets, Manganaro Cronin said. Stosch noted that thrift stores and other secondhand retailers typically sell between 10% and 50% of their inventory, with a minor portion ending up in the trash, mainly soiled items unsuitable for wearing or use. Another share is categorized as mixed rags and baled for export, where it undergoes further sorting for reuse, resale, or recycling. Many of these bales are sent to Pakistan and Malaysia, where workers are trained to manually sort each piece to separate quality clothing for resale while diverting lower-quality textiles for other uses. Stosch described this process as extremely labor-intensive, requiring long hours of standing and sorting through items, and noted that there is a cap on how much textiles can be handled this way due to the time involved. From there, many clothes intended for resale are shipped to countries in Africa, the Caribbean, and Central America. Over 1.5 billion people globally depend on secondhand clothing, she said, particularly as an alternative to low-quality fast fashion brands. Guatemala has a notably strong secondhand import market, she added. A 2025 study by Full Cycle Resource found that the country imported 290 million pounds of clothing in 2023 and reused more than 91% of it, with women-owned clothing stores accounting for over half of the industry. Complex Streams, Complex Recycling Options When clothing or textiles are too worn or unfit for further wear and have already been downgraded to rags or industrial cloth, recycling becomes one of the next best options. This is where a fresh set of difficulties emerges, said Katarina Goodge, a materials research engineer at NIST. Textiles represent a complex and challenging waste stream to sort, partly because no established standards exist for handling these materials today, she said. Establishing standards would help boost efficiency in this system, she added. Another issue is that textile sorting is predominantly done manually, unlike other recycled materials that can be quickly sorted using various AI-enabled robotic sorting technologies, Goodge noted. One reason manual sorting remains standard is the difficulty in determining a garment's exact composition. Goodge explained that knowing the fiber content is essential to know how to recycle a garment, but the tag inside might only state it is made of 95% rayon and 5% other, or an itchy tag might be completely removed. She emphasized the need for a more systematic and technological approach, and noted that technology is advancing. Handheld near-infrared devices can reveal a garment's material composition, and when combined with AI or machine learning models, identifying fiber contents can become faster and more efficient. A handheld NIR scanner could be used alongside manual sorting to direct garments into appropriate bins, Goodge said, and larger-scale systems might identify textiles while on a conveyor belt, with a robotic arm component to pick out specific items. In the U.S., textile recycling infrastructure is less common than curbside recycling systems, though some companies have invested in such technology in recent years. A Future of Reuse, Repair, and Policy Change Legislation could drive changes in textile recycling efforts in the years ahead, the speakers said. California's extended producer responsibility for textiles law is being implemented, which will encourage more outlets for clothing donation, repair, and recycling, Stosch said. Countries in the EU are also required to implement similar textile EPR programs. Meanwhile, disposal bans in states like Massachusetts have led both thrift stores and lawmakers to consider what to do with textiles that are not suitable for resale but could be recycled into other products, Stosch said. Most thrift stores will accept apparel that is torn or missing buttons, as long as it is clean, she noted, adding that if it is clean, it can be turned into something else. There is also potential for creative ways to reuse or repair clothing before it reaches a recycling center, speakers added. For instance, community repair events are effective for teaching basic sewing skills and inspiring people to create something new from old apparel, Goodge said. She noted that the U.S. once had some infrastructure for repair, but that has largely disappeared because it is difficult to keep economically viable, yet repair efforts have significant potential to keep many garments as garments. P Read on IndexBox.