sentences:  Many types of cellulosic materials have been used, including newspaper, cardboard, cotton, straw, sawdust, hemp and corncob.Monticello was insulated with a form of cellulose.Modern cellulose insulation, made with recycled newspaper using grinding and dust removing machines and adding a fire retardant, began in the 1950s and came into general use in the US during the 1970s
  
  The market for insulation increased following the oil embargo of 1973-74.