Originally Posted by sdsester
As long as it has not been chemically treated in any major way you should be alright. You could probably even compost the stuff.
And there lies the problem. It's treated with borates as a fire retardant. The borates also impede mold and fungi growth, so it might take a heck of a long time to break down. Re-using it as suggested is the best thing, if possible. Otherwise, you can call your waste management company and arrange for a one time curbside pick-up. Usually pretty cheap, but you'll have to bag it all up.