Beyond Microplastics: How Tire Wear Particles Influence Plant Performance.
Zhao T, Li G, Lozano YM, Wang Y, Lehmann A
Soil Health
Every road, parking lot, and driveway near your garden or local park is a source of tire particle pollution that silently degrades the soil your food and flowers grow in.
Every time a car brakes or turns, tiny bits of tire rubber flake off and settle into the ground. These particles aren't just inert rubber — they slowly leak out metals and toxic chemicals that plants absorb through their roots, stunting growth and reducing harvests. Scientists are now mapping just how widespread and serious this problem is for plants everywhere from farmland to city parks.
Key Findings
Tire wear particles are one of the largest sources of microplastic pollution in soils, released directly at road surfaces and transported into surrounding land and waterways.
TWPs release a complex and changing mixture of toxic substances including heavy metals, polycyclic aromatic hydrocarbons (PAHs), and reactive chemical additives that plants can take up through their roots.
Exposure to tire wear particles measurably impairs plant performance, affecting germination, root development, and overall growth — with implications for both wild ecosystems and agricultural crop yields.
chevron_right Technical Summary
Tiny particles shed from car tires accumulate in soil and release a toxic cocktail of metals and chemicals that measurably harm plant growth, root function, and crop yields — posing a widespread but largely invisible threat to terrestrial ecosystems.
Abstract Preview
Tire wear particles (TWPs), a major source of microplastic pollution, are mainly released in soils. TWPs are rubber-mineral composites that release evolving mixtures of metals, polycyclic aromatic ...
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