| Location | Southeastern Asia, island in the Indian Ocean, south of Indonesia |
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| Geographic coordinates | 10 30 S, 105 40 E |
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| Zone | Asia |
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| Area | total: 135 sq km
land: 135 sq km
water: 0 sq km |
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| Land boundaries | 0 km |
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| Coastline | 138.9 km |
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| Maritime claims | territorial sea: 12 nm
contiguous zone: 12 nm
exclusive fishing zone: 200 nm |
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| Climate | tropical with a wet season (December to April) and dry season; heat and humidity moderated by trade winds |
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| Terrain | steep cliffs along coast rise abruptly to central plateau |
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| Elevation extremes | lowest point: Indian Ocean 0 m
highest point: Murray Hill 361 m |
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| Natural resources | phosphate, beaches |
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| Irrigated land | 138.9 km |
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| Natural hazards | the narrow fringing reef surrounding the island can be a maritime hazard |
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Environment -
current issues | loss of rainforest; impact of phosphate mining |
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| Geography - note | located along major sea lanes of Indian Ocean |
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