This is due to the psychoactive part of the chemical, which causes the high or spaced feeling
Asbestos-induced pulmonary fibrosis is augmented in 8-oxoguanine DNA glycosylase knockout mice
Theres no tar, carbon monoxide, or other toxic substances produced by burning tobacco
All through my boyhood I had a profound conviction that I was no good, that I was wasting my time, wrecking my talents, behaving with monstrous folly and wickedness and ingratitude and all this, it seemed, was inescapable, because I lived among laws which were absolute, like the law of gravity, but which it was not possible for me to keep
Behind me, two guys were making pasta