a measurement of the pollutants in the air; a description of healthiness and safety of the atmosphere
Smog is a mixture of pollutants, principally ground-level ozone and produced by chemical reactions, that greatly affects air quality.
Equipped with sensors, the benches will be able to provide data on weather conditions, noise, and air quality.
By comparison, New York's air quality index was 30 on Friday morning.
Those same mandates are making our air quality worse and causing food prices to rise.