Rhanbarth
- United States 154 canlyniadau
- China 4 canlyniadau
- Colorado 4 canlyniadau
- Kentucky 4 canlyniadau
- Outer space 4 canlyniadau
- Pueblo 4 canlyniadau
- Richmond 4 canlyniadau
- Russia (Federation) 4 canlyniadau
- Africa 2 canlyniadau
- Colorado River Watershed (Colo.-Mexico) 2 canlyniadau
- Developing countries 2 canlyniadau
- Everglades 2 canlyniadau
- Everglades (Fla.) 2 canlyniadau
- Florida 2 canlyniadau
- Klamath River Watershed (Or. and Calif.) 2 canlyniadau
- Louisiana 2 canlyniadau
- Mars (Planet) 2 canlyniadau
- Mexico, Gulf of 2 canlyniadau
- Nigeria 2 canlyniadau
- North America 2 canlyniadau
- Polar regions 2 canlyniadau
- Russia 2 canlyniadau
- Solar system 2 canlyniadau
- Virginia 2 canlyniadau