Columbia subject headings:
Energy policy--Environmental aspects--Periodicals.
Energy policy--Periodicals.
Environmental policy--Periodicals.
Power resources--Periodicals.
Harvard subject headings:
Ecology--Periodicals
Environmental policy--Periodicals
Power resources--Periodicals
Princeton subject headings:
Ecology--Periodicals.
Environmental policy--Periodicals.
Periodicals.
Power resources--Periodicals.