By way of example, PPM implies "sections for each million". If you discover out the focus of NO2textual content NO _2NO2​ is equivalent to one ppm, it ensures that if you're taking a "sample" of air and divide it into a million components, one of these will consist of NO2textual https://travisekiex.kylieblog.com/37332357/the-5-second-trick-for-online-ppm-calculator