Region
- United States 1,598 results
- Great Britain 111 results
- OECD countries 105 results
- Europe 83 results
- China 76 results
- Developing countries 70 results
- India 59 results
- Africa 53 results
- Germany 49 results
- Japan 48 results
- Outer space 48 results
- California 46 results
- New York (State) 41 results
- France 40 results
- Canada 36 results
- Australia 34 results
- Asia 30 results
- England 26 results
- Mexico 25 results
- West (U.S.) 22 results
- New York 21 results
- Middle East 20 results
- Texas 20 results
- Russia (Federation) 19 results
- Colorado 18 results
- European Union countries 18 results
- Kenya 18 results
- Massachusetts 18 results
- Netherlands 18 results
- North America 16 results
- Washington (State) 16 results
- Latin America 14 results
- Russia 14 results
- Soviet Union 14 results
- Appalachian Region 12 results
- Chile 12 results
- Florida 12 results
- Italy 12 results
- Michigan 12 results
- New Mexico 12 results
- Rome 12 results
- Alaska 10 results
- Brazil 10 results
- Hanford Site 10 results
- Indonesia 10 results
- Mexico, Gulf of 10 results
- Middle West 10 results
- Spain 10 results
- Utah 10 results
- Belgium 9 results
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