Columbia subject headings:
Acid rain--Economic aspects.
Ecology--Research--Government policy.
Environmental engineering--Research.
Environmental policy--Economic aspects.
Greenhouse effect, Atmospheric--Economic aspects.
Harvard subject headings:
Environmental engineering--OECD countries.
Environmental policy--Economic aspects
Environmental policy--European Economic Community countries
Federal aid to research--OECD countries.
Research--Government policy--OECD countries.
Technological innovations--OECD countries.
Princeton subject headings:
Environmental policy--European Economic Community countries.