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Located at the foot of Mount Leuser, Tangkahan was previously known as the epicenter of illegal logging.
The last lowland tropical in Sumatra is threatened by the planned construction of a road meant for coal transport.
Lake Toba in North Sumatra and 14 other lakes across Indonesia are in critical condition.
President Joko Widodo (Jokowi) called on security authorities in Jambi on Sunday to seriously tackle illegal logging that still occurs in Sumatra.