The mucus and hairs in your nose can trap larger particles, but small PM2.5 particles can bypass these defenses and penetrate deep into the lungs.
Carlos Gould notes that the smallest particles from smoke can travel into the bloodstream, potentially causing cellular damage and linking to various health issues.
Health effects related to wildfire smoke include heart conditions, infertility, and dementia, complicating the relationship between smoke exposure and individual health outcomes.
Researchers face challenges in determining exposure levels needed for health effects, as well as the specific air quality metrics that predict health risks.
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