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We know how important it is for the air we breathe in to be kept clean.

For this important worldwide matter, the European Union published the Air Quality Standards. At the same time, the EPA (USA Environmental Protection Agency) has conducted a study on the air quality values and norms we breathe in indoor environments and publish air quality values.

The color-coded table of EPA, which indicates how clean or polluted the air is, shows us the interval of values where the air we breathe should lie within.

PM2.5 : Particles smaller than 2.5 micrometers
PM10 :Particlessmallerthan10micrometers
PPM : 1 unit per million of the total amount of substance in any mixture is called 1 ppm.
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