Brake dust is potentially hazardous because it may contain asbestos. Which is the best expression of this hazard?

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Brake dust can be hazardous because it may contain asbestos, a mineral fiber once used in brake linings. When brake components wear or are disturbed, asbestos fibers can become airborne and be inhaled. These fibers can become trapped in lung tissue and over time cause serious diseases such as asbestosis, mesothelioma, or lung cancer. The hazard is expressed by naming asbestos, which communicates the specific danger and informs the necessary protective actions. Copper, silica, and carbon are not the specific hazard described in this context, even though silica dust has its own health risks. Understanding that asbestos is the risky constituent helps you take appropriate precautions, like avoiding dry cleaning, using wet cleaning methods, and wearing proper respiratory protection.