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Data and recovered analysis code for "Quantification and mapping of tyre wear emissions: from EU regional analysis to global projections"
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This is a data archive, not a new study: it shares the underlying numbers and code used to estimate how much tiny rubber and plastic debris comes from car tires wearing down, across Europe and globally. Tire wear is a major but often overlooked source of microplastic pollution that can end up in our air, water, and soil, so tools like this help scientists track and eventually reduce our exposure to it.
This deposit contains supporting data and recovered analysis code for Chapter 3 of the doctoral thesis Microplastics: Sources, Pathways and Aquatic Fate. The chapter is based on the article "Quantification and mapping of tyre wear emissions: from EU regional analysis to global projections" (Environment International, 203, 109720; https://doi.org/10.1016/j.envint.2025.109720). The collection represents the thesis archive and should not be assumed to be an exact executable reproduction of the published article.The ZIP archive contains five values-only Excel workbooks, three R scripts and an English README. The data cover vehicle registrations and mileage, tire mass-loss and volume-loss assumptions, 136 literature emission-factor observations, EU-27 emission estimates and environmental pathways, model inputs, 57-country OLS estimates, and reported validation metrics. Units, sources, missing-value conventions and dataset-specific limitations are documented within the workbooks.The R files provide the recovered OLS/random-forest training and leave-one-out cross-validation section, OLS diagnostic plotting, and variable-importance/partial-dependence plotting. The scripts use English comments and archive-relative input paths. The importance and partial-dependence plotting script uses numerical arrays stored in the source; it does not calculate them from a fitted forest.The recovered model inputs and configurations have not been fully reconciled with all final thesis results. In particular, the historical TOTAL training response has 24 nonmissing country values, whereas the chapter reports 27; some uncertainty fields have unresolved statistical meaning; and historical software versions are not established. The README and Data Notes describe these limits. This deposit supports inspection and reuse of the available materials and does not claim complete reproduction of every reported result.
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Data and recovered analysis code for "Quantification and mapping of tyre wear emissions: from EU regional analysis to global projections"
AI summary Read the abstract
This deposit shares the data and code behind a study estimating how much tiny plastic and rubber debris comes from car tires wearing down, across Europe and globally. Tire wear is a major, often overlooked source of microplastic pollution that can end up in water, soil and air, raising concerns about long-term exposure. Note that this is supporting data for reuse, not a new health finding itself, and some parts couldn't be fully matched to the original study's results.
Spatiotemporal dynamics of tire wear particles reveal escalating emission inequalities across China's road network
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This study mapped where tiny plastic and rubber particles from car and truck tires are shed across China's roads, and found that pollution from this "tire wear" is growing unevenly—some areas are getting hit much harder than others, especially near busy roads and cities. This matters because these particles are a major source of microplastics that can pollute air, water, and soil, and understanding where they pile up helps identify which communities may face greater exposure risks.
Spatiotemporal dynamics of tire wear particles reveal escalating emission inequalities across China's road network
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Researchers tracked how tiny bits of worn-off tire rubber—a major source of microplastic pollution—are spreading across China's roads over time and location, finding that some areas are getting hit with much more of this pollution than others, and the gap is widening. Tire wear particles can carry chemicals and end up in air, water, and soil, so understanding where they're piling up matters for figuring out who's most exposed and where cleanup or prevention efforts should focus first. Note that this repository shares the study's data-analysis code rather than presenting new health findings directly.
Tire wear particle emissions: Measurement data where are you?
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Researchers traced the measurement data behind 14 country-level studies estimating tire wear particle emissions and found that nearly all relied on a chain of citations rather than original measurements. Of 63 interconnected studies, only nine contained actual emission measurements, and most of those dated back to the 1970s. The findings reveal a critical gap in reliable, up-to-date data on tire wear emissions despite growing concern about their contribution to microplastic pollution.
Global Road-Network Tire-Wear Particle Emissions - Code and Data Repository
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Every time tires roll on roads, they shed tiny plastic particles that wash into soil, rivers, and ecosystems far beyond cities—and this study maps where that pollution is heaviest worldwide. The findings suggest that switching to electric vehicles alone won't solve the problem, since EVs are often heavier and can produce similar or even more tire-wear particles. While this research focuses on wildlife and ecosystems, it's a reminder that tire dust is a major, often overlooked source of microplastics in our environment—the same particles increasingly found in human blood, lungs, and organs.
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