According to Hunter S. Thompson R.I.P. the quote was from one named Dr. Johnson (it's in the book and movie of "Fear and loathing in Las Vegas") But I got a smell problem, and in my situation I think a unit to keep the enitre room smell free would be the best (closet grow). so I was wondering what would be better, they seem about the same price on the net, so I wanted a little info. on which would be more beneficial. Have there been problems with the ozone generators? is that why you said it is unknown weather or not they harm plants?