Concentration

{
  "id": "MLC-T-MET-004565",
  "term": "Concentration",
  "field": "Meteorology and atmospheric science",
  "definition": "The amount of a substance present in a given volume or mass of air or other medium. It quantifies the abundance of atmospheric constituents, such as pollutants, greenhouse gases, or aerosols. Concentrations are often expressed in units like parts per million (ppm), parts per billion (ppb), or micrograms per cubic meter (µg/m³).",
  "synonyms": [
    "compactness"
  ],
  "url": "https://mlchart.com/terminology/meteorology/concentration/"
}