| Climate Saint Helena :
| Saint Helena - tropical; marine; mild, tempered by trade winds; Tristan da Cunha - temperate; marine, mild, tempered by trade winds (tends to be cooler than Saint Helena)
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| Terrain Saint Helena :
| Saint Helena - rugged, volcanic; small scattered plateaus and plains
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| Elevation extremes lowest Saint Helena :
| Atlantic Ocean 0 m
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| Elevation extremes highest Saint Helena :
| Queen Mary's Peak on Tristan da Cunha 2,060 m
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| Natural resources Saint Helena :
| fish
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| Land use arableland Saint Helena :
| 12,90%
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| Irrigated land Saint Helena :
| NA sq km
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| Natural hazards Saint Helena :
| active volcanism on Tristan da Cunha
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| Environment current issues Saint Helena :
| NA
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| Geography note Saint Helena :
| harbors at least 40 species of plants unknown anywhere else in the world; Ascension is a breeding ground for sea turtles and sooty terns
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