Columbia subject headings:
Environmental policy--Economic aspects.
Environmental protection--Economic aspects.
Natural resources--Valuation.
Pollution--Economic aspects.
Harvard subject headings:
Environmental policy--Decision making
Environmental policy--Economic aspects
Environmental policy--Economic aspects--Decision making.
Environmental policy--Evaluation
Environmental protection--Economic aspects
Environmental protection--Economic aspects--Decision making.
Natural resources--Valuation.
Pollution--Economic aspects
Princeton subject headings:
Environmental policy--Economic aspects.
Environmental protection--Economic aspects.
Natural resources--Valuation.
Pollution--Economic aspects.