Columbia subject headings:
Harvard subject headings:
Environmental economics--European Union countries--Statistics.
Environmental economics--Germany--Statistics.
Renewable natural resources--European Union countries--Statistics.
Renewable natural resources--Germany--Statistics.
Sustainable development--European Union countries--Statistics.
Sustainable development--Germany--Statistics.
Princeton subject headings:
Environmental economics--European Union countries.
Environmental economics--Germany.
Renewable natural resources--European Union countries.
Renewable natural resources--Germany.
Sustainable development--European Union countries.
Sustainable development--Germany.