As an example, PPM implies "components for each million". If you discover out that the concentration of NO2textual content NO _2NO2​ is equal to 1 ppm, it ensures that if you are taking a "sample" of air and divide it into a million components, one of these will encompass NO2text https://ppm-calculator84396.educationalimpactblog.com/58172959/ppm-calculator-no-further-a-mystery