I’m Glad to see that your doing some searching. A few suggestions on where to get facts, and where not to. Stay away from sources that have other agendas. It would be unwise to except as “Facts” information from about cellulose, or fiberglass, from sources that are affiliated with, or promoting, one product over another. You could not expect reliable information from them, any more than you could expect reliable information on whether smoking causes cancer from R.J. Reynolds (Or reliable information on what really is a vote from Al or George W.) Such sources are driven by another agenda. So, avoid accepting as gospel information on cellulose from places such as Owens Corning or NAIMA (A confederation of Fiberglass manufacturers. What you sited as facts is almost word for word from their web site.). You also wouldn’t go to sources promoting Cellulose. Such place’s goal is to put their product in the best light possible. They do this by being selective as to which facts they publish. They will pull the facts that spin the facts in there favor. As far as the facts about their competitors, those are spun to produce FUD (Fear, Uncertainty, and Distrust). True, what they provide as facts are not lies. They are also not the complete truth. They are carefully worded to slant opinion in one way or another. Please keep searching.