Loose-fill cellulose is a very interesting and natural insulation type, because its made from wastepaper, like newspapers, boxes and other recycled paper materials. There are added just some special chemicals to make cellulose loose-fill insulation fireproof and also resistant to different things like insects.
Environmentally loose-fill cellulose production is much friendlier, because there is huge energy saving during cellulose insulation production compared to production of other types or insulations like fiberglass or rock-wool insulations.