Natural occurrence

{
  "id": "MLC-T-CHM-007783",
  "term": "Natural occurrence",
  "field": "Chemistry",
  "definition": "The presence of a substance in the environment or in living organisms as a result of natural processes, without human intervention. This contrasts with substances introduced through anthropogenic activities. Examples include naturally occurring minerals, toxins produced by plants, or elements found in the Earth's crust.",
  "subject": "Chemistry and Human Health",
  "references": [
    "PAC, 2007, 79, 1153. 'Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)' on page 1268 (https://doi.org/10.1351/pac200779071153)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/natural-occurrence/"
}