Wildfire smoke poses significant health risks to urban populations, extending far beyond immediate fire zones. Fine particulate matter (PM2.5) in smoke is linked to increased asthma hospitalizations, while chemical reactions in smoke create harmful volatile organic compounds (VOCs) and ground-level ozone. These pollutants can travel thousands of kilometers and persist in the atmosphere for weeks, leading to elevated cancer risks and thousands of excess deaths annually due to increased ozone pollution. AI
RANK_REASON The item is an analysis piece discussing research on wildfire smoke's health impacts, rather than a primary announcement or event.
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