Class I Area

{
  "id": "MLC-T-ENV-005077",
  "term": "Class I Area",
  "field": "Environment",
  "definition": "1. Under the Clean Air Act. a Class I area is one in which visibility is protected more stringently than under the national ambient air quality standards; includes national parks, wilderness areas, monuments, and other areas of special national and cultural significance.\n\n2. Class I areas are protected by the Prevention of Significant Deterioration (PSD) program and include national parks, national wilderness areas, national monuments, national seashores, and other areas of special national or regional natural, recreational, scenic, or historic value.",
  "subject": "General environmental",
  "references": [
    "Terms of Environment",
    "Basic Concepts in Environmental Sciences"
  ],
  "url": "https://mlchart.com/terminology/environment/class-i-area/"
}