<div dir="rtl">المصادر
https://www.epa.gov/pm-pollution/particulate-matter-pm-basics
https://www.compoundchem.com/2015/05/05/atmospheric-pollutants/
https://www.niehs.nih.gov/health/topics/agents/air-pollution
https://www.who.int/teams/environment-climate-change-and-health/air-quality-energy-and-health/health-impacts
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