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Region
- Afghanistan1
- Africa28
- Africa, Central1
- Africa, East1
- Africa, North3
- Africa, Sub-Saharan38
- Africa, West1
- Alabama6
- Alameda County (Calif.)2
- Alaska1
- Alaska, Southeast1
- AlaskaJuneau1
- AlaskaTongass National Forest1
- Albany (N.Y.)1
- AlbertaCalgary12
- Algeria1
- Amazon River Valley1
- America4
- Amsterdam (Netherlands)1
- Andes Region2