PSI

{
  "id": "MLC-T-MET-008197",
  "term": "PSI",
  "field": "Meteorology and atmospheric science",
  "definition": "The Pollutant Standards Index, a measure of air quality developed by the U.S. Environmental Protection Agency. It reports daily air quality for five major air pollutants: ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide. The index is a numerical scale from 0 to 500, with higher values indicating greater levels of air pollution and associated health concerns.",
  "url": "https://mlchart.com/terminology/meteorology/psi/"
}