Overall population growth in the region has been very rapid during the past nine decades. In 1920, the human populations of Aceh and North Sumatra provinces were 736,348 and 1,961,678, respectively (Volkstelling 1922). By 2008, these had risen dramatically to 4,293,915 and 13,042,317 (BPS 2010a).
From collection: Orangutans and the Economics of Sustainable Forest Management in Sumatra
Riccardo Pravettoni, UNEP/GRID-Arendal