Columbia subject headings:
Harvard subject headings:
Energy policy--Germany (West)--History.
Energy policy--Germany--History--21st century.
Environmental policy--Germany (West)--History.
Environmental policy--Germany--History--21st century.
Renewable energy sources--Government policy--Germany (West)
Renewable energy sources--Government policy--Germany--History--21st century.
Princeton subject headings:
Energy policy--Germany (West)
Energy policy--Germany--History--21st century.
Environmental policy--Germany (West)
Environmental policy--Germany--History--21st century.
Renewable energy sources--Government policy--Germany (West).
Renewable energy sources--Government policy--Germany--History--21st century.