According to The Telegraph, the Borneo Orangutan Survival Foundation, a non-profit group dedicated to conserving the Bornean orangutan population, is caring for 37 young orangutans “suspected to have contracted a mild respiratory infection” from air pollution caused by the fire, at their rehabilitation center located near the capital city of the Indonesian province of Central Kalimantan.

The Washington Post reports that, in the past, forest fires, like the ones that have been burning throughout Indonesia since July, have been started illegally by palm oil farmer to clear land.