Mongabay: The extent of old-growth forest in Sumatra shrank by 40 percent over the past 20 years, while overall forest on the Indonesian island declined by 36 percent, finds a comprehensive new satellite-based assessment published in Environmental Research Letters. The research, conducted by an international team led by Belinda Arunarwati Margono of South Dakota State University and Indonesia’s Ministry of Forestry, reveals the dire condition of Sumatra’s once extensive rainforests. Overall Sumatra lost 7.5…

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