Columbia subject headings:
Air quality management--United States--Cost effectiveness.
Decentralization in government--Economic aspects--United States.
Environmental policy--United States--Cost effectiveness.
Environmental protection--Economic aspects--United States.
Water quality management--United States--Cost effectiveness.
Harvard subject headings:
Drinking water--Standards--United States--Cost effectiveness.
Environmental policy--United States--Cost effectiveness
Environmental protection--Economic aspects--United States
Ozone--Environmental aspects--United States--Cost effectiveness.
Water quality management--United States--Cost effectiveness.
Princeton subject headings:
Drinking water--Standards--United States--Cost effectiveness.
Environmental policy--United States--Cost effectiveness.
Environmental protection--Economic aspects--United States.
Ozone--Environmental aspects--United States--Cost effectiveness.
Water quality management--United States--Cost effectiveness.