Region
- United States 34 results
- New Zealand 23 results
- Great Britain 13 results
- Australia 11 results
- Europe 11 results
- Developing countries 10 results
- Oceania 7 results
- Arctic regions 4 results
- Pacific Area 4 results
- Asia 3 results
- China 3 results
- Antarctica 2 results
- England 2 results
- Europe, Eastern 2 results
- Iowa 2 results
- Mexico 2 results
- North America 2 results
- Southeast Asia 2 results
- Africa, Southern 1 results
- Athens 1 results
- Australasia 1 results
- California 1 results
- Canada, Western 1 results
- Canterbury 1 results
- Case studies 1 results
- Cold regions 1 results
- Europe, Central 1 results
- Former Soviet republics 1 results
- Germany (East) 1 results
- Greece 1 results
- Himalaya Mountains 1 results
- Loma Prieta Region 1 results
- Mediterranean Sea 1 results
- Mendota, Lake 1 results
- Mexico City Region 1 results
- Midlands 1 results
- Netherlands 1 results
- New South Wales 1 results
- New York Bight (N.J. and N.Y.) 1 results
- Northwest, Pacific 1 results
- Pennsylvania 1 results
- Rocky Mountains Region 1 results
- San Francisco Bay Area 1 results
- Scandinavia 1 results
- Severn River Estuary (England and Wales) 1 results
- Switzerland 1 results
- Sydney 1 results
- Thorney Island 1 results
- Wisconsin 1 results
- Yellow River Watershed 1 results