Columbia subject headings:
Harvard subject headings:
Climatic changes--Government policy--European Union countries.
Energy policy--European Union countries
European Union
European Union countries--Commercial policy.
European Union countries--Economic policy.
European Union countries--Foreign relations.
European Union countries--Social policy.
Princeton subject headings:
Climatic changes--Government policy--European Union countries.
Energy policy--European Union countries.
European Union countries--Commercial policy.
European Union countries--Economic policy.
European Union countries--Foreign relations.
European Union countries--Social policy.
European Union.
Treaty on European Union Protocols, etc.