Columbia subject headings:
Harvard subject headings:
Bündnis 90.
Christlich-Demokratische Union Deutschlands
Christlich-Soziale Union.
Environmental policy--Germany
Germany--Politics and government--21st century.
Grünen (Political party)
Political parties--Germany
Princeton subject headings:
Environmental policy--Germany.
Germany--Politics and government--21st century.
Grünen (Political party)
Political parties--Germany.