How is air quality across the U.S. these days?

How is air quality across the U.S. these days?

Air quality is defined as the degree to which the air of a set place is pollutant-free. In the United States, air quality is measured through the Air Quality Index (AQI) created by the U.S. Environmental Protection Agency (EPA). The post How is air quality across the U.S. these days? appeared first on EgbertoWillies.com.