Air pollution is now part of everyday life in many cities. People hear words like AQI, PM2.5, unhealthy air, and hazardous pollution, but most still do not truly understand how dangerous the air is for their body. When someone hears that the AQI today is 180 or 250, it does not clearly explain what that number means for their lungs and heart. This is why the AQI Cigarette Calculator is becoming very popular.