Criteria pollutants

{
  "id": "MLC-T-MET-004756",
  "term": "Criteria pollutants",
  "field": "Meteorology and atmospheric science",
  "definition": "A group of common air pollutants regulated by national ambient air quality standards due to their known harmful effects on human health and the environment. These pollutants include particulate matter, ground-level ozone, carbon monoxide, sulfur oxides, nitrogen oxides, and lead. The U.S. Environmental Protection Agency sets primary and secondary standards for these substances.",
  "see_also": [
    "air pollutants"
  ],
  "url": "https://mlchart.com/terminology/meteorology/criteria-pollutants/"
}