http://info.cancerresearchuk.org/healthyliving/smokeispoison/poisonoussmoke/otherpoisons/ 発癌物質以外の毒性について (タバコ煙のシアン化水素(青酸ガス)は、人体の発癌物質等の毒物を吐き出す機能を弱らせ、ガンになりやすくする。 シアン化水素自体には発ガン性はない。タバコ煙のアンモニア、一酸化炭素も同じ。) Hydrogen cyanide is a poisonous gas. Of all the chemicals in tobacco smoke, it does the most damage to the heart and blood vessels. Hydrogen cyanide does not cause cancer, but it increases the risk of other chemicals causing cancer by damaging cilia. These are tiny hairs lining the airways that help to clear toxins away. By killing cilia, hydrogen cyanide causes other dangerous chemicals to be stuck in the lungs and airways. *Hydrogen cyanide=シアン化水素(=青酸ガス)