Traditional Culture Encyclopedia - Weather inquiry - What do the numbers below pm2.5 in the weather forecast mean?
What do the numbers below pm2.5 in the weather forecast mean?
I don't know whether you are talking about the weather forecast on the internet or on TV.
The value is generally AQI, which refers to the air quality index, and PM2.5 is the main pollutant.
Or the average concentration of PM2.5, how many micrograms per cubic meter.
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