Yes, tire wear is indeed one of the sources of non-exhaust particulate matter (PM) emitted by vehicles. While it is not considered "dangerous" in the same way as exhaust emissions (which include harmful pollutants like nitrogen oxides and particulate matter from combustion), tire wear can still contribute to air pollution and environmental degradation.
Tire wear generates tiny particles as the tires degrade and interact with the road surface. These particles can contribute to various environmental issues, including air quality problems and soil and water contamination. Other sources of non-exhaust particulate matter from vehicles include:
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Brake Wear: Brake pads and discs wear down during use, producing fine particulate matter that can be released into the environment.
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Road Abrasion: The wear and tear on road surfaces caused by vehicle tires can generate dust and particles.
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Resuspension of Dust: Vehicles traveling on unpaved or gravel roads can resuspend existing dust and particulate matter.
While tire wear and other non-exhaust sources may not have the same immediate health impacts as exhaust emissions, they are still important contributors to overall air pollution and must be considered in efforts to improve air quality. Efforts to reduce particulate matter from all sources, including tire and brake wear, are crucial for promoting better public health and protecting the environment.