Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Landscape -- Great Britain, 3 canlyniadau
- Agriculture -- Great Britain, 2 canlyniadau
- Land use -- Great Britain, 2 canlyniadau
- National parks and reserves -- Great Britain, 2 canlyniadau
- Environmental protection -- Great Britain, 1 canlyniadau
- Pollution -- Great Britain, 1 canlyniadau
- Agricultural landscape management -- Great Britain, 1 canlyniadau
- Nature conservation -- Great Britain, 1 canlyniadau
- Landscape protection -- Great Britain, 1 canlyniadau
- Water conservation -- Great Britain, 1 canlyniadau