Long-Term Exposure to PM10 and PM2.5 May Reduce the Risk of Developing Melanoma
Source: Dermatology Times, February 2025
When considering multiple variables, long-term exposure to particulate matter (PM) may protect against the development of melanoma. According to a novel preliminary study, higher concentrations of PM10 and PM2.5 correlate with a decreased risk of melanoma.
PM is solid particles and liquid droplets of pollution found in the air from vehicle emissions and other industrial activities. More specifically, PM10 are inhalable particles with diameters that are 10 ?m and smaller while PM2.5 are finer inhalable particles, with diameters that are 2.5 ?m and smaller. Depending on the density, composition, and shape, PM can absorb, scatter, or diffuse solar UV radiation.
“Atmospheric pollution has a complex impact on the UV index, potentially reducing or increasing UV exposure depending on the composition and concentration of pollutants in the air,” the authors wrote. “Some studies have reported that PM can reduce UV radiation by over 25%.”