What does poor air quality mean according to Accuweather?

The environmental protection agency (EPA) Monitors the air quality of five major pollutants namely; SO2, NO2, Ozone, CO and particulate matter (both PM10 and PM2.5). Based on the concentration level of each pollutant a certain value is assigned between the range 0-500. The higher values are correlated to higher pollution levels and vice versa. So, … Read more