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).
Political involvement should be a requirement for citizenship
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).