Adverse impact on visibility

{
  "id": "MLC-T-ENV-000613",
  "term": "Adverse impact on visibility",
  "field": "Environment",
  "term_source": "Adverse Impact on Visibility",
  "definition": "For purposes of section 307, visibility impairment which interferes with the management, protection, preservation, or enjoyment of the visitor's visual experience of the Federal Class I area. This determination must be made on a case-by-case basis taking into account the geographic extent, intensity, duration, frequency and time of visibility impairments, and how these factors correlate with (1) times of visitor use of the Federal Class I area, and (2) the frequency and timing of natural conditions that reduce visibility. This term does not include effects on integral vistas.",
  "subject": "Outcomes",
  "references": [
    "40 CFR 51.301 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/adverse-impact-on-visibility/"
}