Slash-and-burn clearances
Slash-and-burn farming is a technique that involves cutting down vegetation and burning to clear land for cultivation
It is cheaper than using excavators and bulldozers
The illegal burning of forests to clear land for palm oil plantations has long been a problem in Indonesia - particularly during the dry season in the summer
Indonesia's Environment Minister Balthazar Kambuaya has said the government is investigating several palm oil companies in this respect
Some producers have already denied their companies use slash and burn land clearance