We usually think of air pollution as something that happens outside. Traffic. Smoke. Wildfires. Smog. But the air inside our homes, schools, offices, and other indoor spaces can contain its own mix of pollutants, including fine particles, chemicals, allergens, and airborne germs. And because we spend so much of our time indoors, indoor air quality deserves more attention. Cleaner air can start with better ventilation, filtration, reducing indoor pollution sources, and using high-quality masks when needed. What you breathe matters, indoors and out. #IndoorAirQuality #AirPollution #CleanAir #PublicHealth #Ventilation