can raise levels of cancer-causing benzene above what’s been observed from secondhand smoke.
Yeah this is fairly concerning, I usually think of benzene as super carcinogenic. They actually limit how much of it can be used in gasoline for that reason.
I’d probably want to compare benzene content from various sources and consult the OSHA guidelines before saying how bad this is, but there’s no doubt in my mind that this decidedly bad. You’re getting directly and consistently exposed to the benzene.