It's not like the EPA itself thru an unrelated study has already shows Propylene Glycol used in "fog form" sanitizes the air or anything
http://www.e-cigarette-forum.com/fo...9057-propylene-glycol-knowing-1-2-battle.html
But...but...how can you mention this stuff without completely destroying the argument that vaping is just as dangerous as smoking, it's not like you are removing 15-30X the contaminants and KNOWN bad stuff by not smoking right?
http://www.e-cigarette-forum.com/forum/general-e-liquid-discussion/465485-its-not-nicotine.html
It appears PG itself has germicidal components, and it seems that (Don't quote me on this) in medicinal use, PG is used in an un-altered and compacted form, IE: Aerosol, to spray out a fine dense mist into the air to sanitize. Where as in vaping you are heating up PG to its flash point and not inhaling PG directly.