Columbia subject headings:
Environmental policy--European Union countries.
Environmental policy--Germany.
Environmental policy--Great Britain.
Environmental policy--Greece.
European Union.
Harvard subject headings:
Environmental policy--European Union countries
Environmental policy--Germany
Environmental policy--Great Britain
Environmental policy--Greece.
European Union
Princeton subject headings:
Environmental policy--European Union countries.
Environmental policy--Germany.
Environmental policy--Great Britain.
Environmental policy--Greece.
European Union.