Subject Region
United States
308
Arctic regions
55
Australia
40
China
37
Canada
30
Europe
29
Developing countries
28
Great Britain
28
India
25
Antarctica
23
European Union countries
23
Asia
22
Earth (Planet)
20
Alaska
17
Bangladesh
17
North America
17
Africa
16
Greenland
16
Latin America
14
Polar regions
14
Pacific Area
13
California
12
Caribbean Area
12
East Asia
11
Mexico
11
Middle East
11
Polar Regions
10
Tropics
10
South Africa
9
Southeast Asia
9
Norway
8
Oceania
8
Russia (Federation)
8
South Asia
8
Virginia
8
Brazil
7
Colombia
7
El Nino Current
7
El Niño Current
7
Islands of the Pacific
7
Mediterranean Region
7
Netherlands
6
Peru
6
West (U.S.)
6
Asia, Central
5
Developed countries
5
Great Barrier Reef (Qld.)
5
Maldives
5
Middle West
5
Africa, North
4
more ...