Columbia subject headings:
Harvard subject headings:
Air quality--Standards--United States
Forest fires--United States.
Forest health--United States
Forest management--United States
Forest reserves--Fire management--United States.
Haze--Environmental aspects--United States.
Vegetation management--United States.
Princeton subject headings:
Air quality--Standards--United States.
Forest health--United States.
Forest management--United States.
Forest reserves--Fire management--United States.
Vegetation management--United States.