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.
That sharp dip in air quality across the nation Sunday night?
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.
There are temperature, wind, humidity, and air quality maps.
Still, Ma said, “some questions” remained over the reliability of air quality data.
The air quality is so bad that people say it is difficult to breathe.
Those same mandates are making our air quality worse and causing food prices to rise.