Recycled and effective / Thermal and sound Insulation, pest control, fire retardation.
By Ivanko123 for http://ural-ecovata.ru (Own work) [Public domain], via Wikimedia Commons
Cellulose is composed of 75-85% recycled paper fiber, usually post-consumer waste newsprint. The other 15% is a fire retardant such as boric acid or ammonium sulphate. Cellulose has the highest recycled content of any insulation available. This material is great for attics.