Región
United States
5
Europe
4
Great Britain
4
China
3
India
3
Africa
2
Asia
2
Developing countries
2
North America
2
Southeast Asia
2
Africa, East
1
Africa, Southern
1
Arctic regions
1
Australia
1
Bangladesh
1
East Asia
1
Europe, Western
1
Gujarat
1
Italy
1
Japan
1
Madhya Pradesh
1
Marshall Islands
1
Narmada River Valley (India)
1
Niger River Delta
1
Nigeria
1
Northwest, Pacific
1
Pacific Ocean
1
Polar Regions
1
Polar regions
1
Rongelap Atoll
1
Rongelap Atoll (Marshall Islands)
1
Sardinia (Italy)
1
South Asia
1
Southwestern States
1
Timor-Leste
1