Change in forest cover, 1985-2007
Between 1985 and 2007, 49.3% of all forests on the island were lost. In the provinces of Aceh and North Sumatra the figures were 22.7% and 43.4%, respectively. Most forest loss has occurred in the lowlands, the very areas where orangutan density is highest.
Year: 2011
From collection: Orangutans and the Economics of Sustainable Forest Management in Sumatra
Cartographer: Riccardo Pravettoni, UNEP/GRID-Arendal