Subject
- Environmental policy -- Germany1
- Environmental policy -- Great Britain1
- Environmental policy -- Poland1
- Global warming1
- Greenhouse gas mitigation -- Government policy -- Germany1
- Greenhouse gas mitigation -- Government policy -- Great Britain1
- Greenhouse gas mitigation -- Government policy -- Poland1
- Renewable energy sources -- Government policy -- Germany1
- Renewable energy sources -- Government policy -- Great Britain1
- Renewable energy sources -- Government policy -- Poland1