Parts per billion

{
  "id": "MLC-T-ENV-020327",
  "term": "Parts per billion",
  "field": "Environment",
  "term_source": "Parts Per Billion",
  "definition": "1. One ppb is comparable to one kernel of corn in a filled, 45-foot silo, 16 feet in diameter.\n\n2. Units commonly used to express contamination ratios, as in establishing the maximum permissible amount of a contaminant in water, land, or air.\n\n3. Number of parts of a chemical found in one billion parts of a particular gas, liquid, or solid mixture. See concentration.",
  "abbreviation": "ppb",
  "subject": "Climate change",
  "references": [
    "Environmental Issues Terms & Acronyms; Pesticides Glossary",
    "Terms of Environment",
    "Glossary of Climate Change Terms; Greenhouse Gas Emissions"
  ],
  "url": "https://mlchart.com/terminology/environment/parts-per-billion/"
}