clear papers(hate them)? blunt wraps(never liked mixing herb and tobacco anyway)? butane(better than sulfur)?.....all of which we use to smoke with right? why would you worry about whats in them when you are "smoking". herb smoke contains tar, nicotine and like 500 other carcinogenic and potentially carcinogenic compounds. vaporizers are better... maybe, are there any studies out on them? youre coating your lungs with an oil. my guess is they reduce harmful compounds but dont eliminate them. i know when i use mine the remnants are pretty well browned out no matter what it looked like before it went in. i guess what i mean is, i wouldnt worry too much about the trace elements that come from papers clear or otherwise considering what its used for. blunt wraps...thats just doubling down. but if you do worry about that you should probably get into edibles. and we all know mj has a million uses... but i think we all also know there really is nothing healthy about smoking it or anything else. im a smoker, until my copd gets worse, but im also a realist and know sooner or later that day is coming and i brought it on.