発がん性

Tabako no kemuri no naka ni wa, yaku yonsen shurui no kagaku busshitsu ga ari, kono naka ni wa daiokishin nado yaku nihyaku shurui mo no yūgai busshitsu, yaku rokujū shurui no hatsugansei busshitsu ga fukumarete imasu.In tobacco smoke there are around 4000 kinds of chemical substances, which also include around 200 kinds of dangerous substances such as dioxins, and around 60 kinds of carcinogenic ones.