but it says it avoids damaging primary forests and that the pellets it produces are made using leftover material from local saw mills. 80% is sawdust from sawmills. the last 20% is from well—managed, well—regulated forests which are only harvested for timber, and we take the bits of the tree which cannot be used for lumber because it's too small, it's diseased, it's hollow. and that material would have been left on the ground to decay, or in many cases in british columbia, burnt anyway. if it's genuine waste, it can make environmental sense to burn wood for electricity. drax does use sawdust and waste wood from the timber industry. but we don't think that's all