Yes, car brake pad dust can contain harmful materials that may contribute to respiratory issues. Brake pads wear down over time, releasing dust into the air, which can be inhaled by people nearby. This dust may contain various particulate matter, including metals like copper, asbestos (in older brake pads), and other potentially toxic compounds.
Exposure to brake dust, particularly in high concentrations or over prolonged periods, could pose health risks, especially for individuals with pre-existing respiratory conditions like asthma. While studies have shown that brake dust can be a source of particulate matter and pollutants, significant evidence linking typical exposure to serious long-term lung problems in the general population is still limited.
To minimize exposure, it's advisable for those who work in environments where brake dust is prevalent (like mechanics or automotive workers) to use appropriate personal protective equipment, like masks, and ensure proper ventilation in work areas. For the general public, maintaining distance from areas with high traffic, especially during braking, can help reduce exposure.