Estimated Reading Time: 3 Minutes
The global automotive industry sustains modern mobility, but it concurrently generates one of the world's most persistent and problematic waste streams: end-of-life tires (ELTs). It is estimated that over one billion ELTs are discarded annually across the globe (Contec, 2024). This relentless output has contributed to a legacy issue of approximately 4 billion scrap tires currently stockpiled in landfills and unregulated dumpsites worldwide, a figure projected to increase to 5 billion by 2030 (MarketsandMarkets, 2024). While landfilling has historically been a common method of disposal, it poses significant and long-term environmental and public health risks.
The Landfill Burden: A Non-Biodegradable Problem
Tires are engineered for extreme durability, a quality that makes them an ecological liability at their end-of-life. Composed of a complex matrix of synthetic rubbers, metals, and chemical additives, tires are non-biodegradable and can persist in the environment for centuries. When disposed of in landfills, their physical properties create several issues. Their bulky, hollow shape consumes valuable landfill space and resists compaction, leading to an inefficient use of land. Furthermore, tires have a tendency to trap methane gas, a potent greenhouse gas. This trapped gas can cause tires to become buoyant and "bubble" up to the surface of a landfill, a process that can rupture and damage the protective liners designed to contain toxic waste and prevent environmental contamination (Brooks, 2022).
Environmental Contamination from Leaching
Discarded tires are not inert; they contain a host of chemicals and heavy metals that can be released into the environment over time. As tires in a landfill are exposed to rainwater and other liquids, a toxic liquid known as leachate is formed. This leachate contains hazardous substances such as lead, zinc, cadmium, and polycyclic aromatic hydrocarbons (PAHs), which can seep into the ground (Hashamfirooz et al., 2025). This process contaminates the surrounding soil and can infiltrate groundwater systems, polluting aquifers and surface water bodies that are critical for both ecosystems and human consumption (Eco Green Equipment, 2023). The chemical leaching can also destroy beneficial soil bacteria, disrupting local ecosystems and degrading the land (Tri-State Disposal, 2018).
Acute Public Health and Safety Hazards
Beyond long-term contamination, tire stockpiles in landfills present immediate and severe risks.
-
Catastrophic Fire Risk: Due to their high fossil fuel content, large accumulations of tires are extremely flammable (Eco Green Equipment, 2023). Tire fires are notoriously difficult to extinguish and can burn for months, releasing dense clouds of toxic smoke into the atmosphere (Gradeall, 2023; Tri-State Disposal, 2018). This smoke contains a hazardous mix of pollutants, including carcinogens like PAHs, heavy metals, and volatile organic compounds, which are linked to severe respiratory illnesses, cardiovascular problems, and cancer (Gradeall, 2023).
-
Pest Proliferation: The shape of a tire is an ideal incubator for disease vectors. Discarded tires collect stagnant rainwater, creating perfect breeding grounds for mosquitoes that can transmit diseases such as West Nile Virus, Dengue Fever, and Zika (Eco Green Equipment, 2023). These stockpiles also provide shelter for rodents and other vermin, further increasing public health risks (Hashamfirooz et al., 2025).
The immense scale of the tire waste problem necessitates a fundamental shift in how this material is managed. Moving towards a circular economy, where end-of-life products are treated as valuable resources rather than waste, presents a viable path forward. By diverting tires from landfills and repurposing the durable rubber for new applications, such as the outsoles of footwear, we can mitigate these environmental threats and transform a global liability into a sustainable resource.
A Step Toward Solutions
At RIGHTNOW, we believe waste should not define our future. That’s why we give old tires a second life by transforming them into durable sandal outsoles. Every pair of sandals made with recycled tire rubber helps reduce landfill waste and keeps toxic material out of our environment.
By choosing recycled products, you’re not just buying footwear, you’re taking part in solving one of the world’s hidden pollution crises.
References
Brooks, D., 2022. 'Car tires are a huge pollution problem that recycling can barely touch', Granite Geek, 19 April. Available at: https://granitegeek.concordmonitor.com/2022/04/19/car-tires-are-a-huge-pollution-problem-that-recycling-can-barely-touch/ (Accessed: 23 September 2025).
Contec, 2024. Tire waste statistics in 2024. Available at: https://contec.tech/tire-waste-statistics-in-2024/. (Accessed: 23 September 2025).
Eco Green Equipment, 2023. Environmental Impacts of Waste Tire Disposal. Available at:
https://ecogreenequipment.com/environmental-impacts-of-waste-tire-disposal/ (Accessed: 23 September 2025).
Gradeall, 2023. Risks of Burning Tires and Tire Recycling Alternatives. Available at:
https://gradeall.com/risks-of-burning-tires-and-tire-recycling-alternatives/. (Accessed: 23 September 2025).
Hashamfirooz, M., Dehghani, M.H., Khanizadeh, M., Aghaei, M., Bashardoost, P., Hassanvand, M.S., Hassanabadi, M., and Momeniha, F., 2025. A systematic review of the environmental and health effects of waste tires recycling. Heliyon, 11(2). Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC11783015/.
MarketsandMarkets, 2024. Tire Recycling Market. Available at:
https://www.marketsandmarkets.com/Market-Reports/tire-recycling-market-202803362.html.
Tri-State Disposal, 2018. 8 Dangers of DIY Tire Disposal. Available at:
https://tri-statedisposal.com/residential-waste/8-dangers-of-diy-tire-disposal-tri-state-disposal/. (Accessed: 23 September 2025).
