Deforestation on the Indonesian island of Sumatra is a major contributor to the emission of worldwide greenhouse gasses.
 
The clearance of peat land areas is of particular concern and in the run up to the international climate conference in Copenhagen environmental campaigners from Greenpeace have been protesting in the region.
 
They have been chaining themselves to bulldozers and diggers in a bid to draw attention to the logging and they hope that decisions will be made in Copenhagen to prevent more trees being felled.
 
Dutchman Ivo de Boer heads the UN's panel on climate change, he says the logging will only stop if there are viable economic alternatives.
 
RNW's Hans Jaap Melissen travelled to the region and filed this video report.