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In page Geography of Thailand:

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Southern Thailand, part of a narrow peninsula, is distinctive in climate, terrain, and resources.[1] Its economy is based on tourism, and palm oil and rubber plantations.[citation needed] In Krabi Province, for example, palm plantations occupy 980,000 rai (1,568 km2), or 52% of the province's farmland.[2] Other sources of income include coconut plantations, tin mining.[1]