Today, some 600 orangutans sit in cages in an animal sanctuary in Indonesia, awaiting their chance to return to the jungle they were driven from. But according to this moving video report, there just is not enough forest for them any more. Over the last 30 years, 80% of their habitat has disappeared – and Kalimantan, the Indonesian portion of the island of Borneo, does not have enough safe, government-approved space for them to be reintroduced into the wild. Although 30 orangutans should be released during 2012, a mass reintroduction attempt was recently cancelled.

The chief villain? The rich world's taste for cheap processed foods – like ice cream – that use palm oil. Greenpeace lists palm oil production alongside illegal logging as prime threats to the rainforest.

Take action: SOS, the Sumatran Orangutan Society, has a page where you can donate or campaign to help save Indonesia's orangutans.