ELi5: What does air quality mean on the weather app and how do they calculate it?
In: Earth Science
It’s a measure of pollutants in the air, different countries use different types of scales and generate an easy to interpret number or band/grade for you.
Most common are PM2.5 and PM10, PM stands for Particulate Matter, measured in micrometers.
They may also measure other sources of pollution such as carbon dioxide, carbon monoxide, nitrogen dioxide and sulphur dioxide.
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