You are a smoker, but you are not worried about your health. Why? Because you smoke cigarettes that do not contain tobacco or nicotine, and you are confident that such cigarettes do not cause any harm to human health like the ones which contain tobacco.
Sorry dude, but you are completely mistaken. If researchers at New York Medical College are to be believed, then tobacco-free cigarettes are likely to be more carcinogenic (i.e. a substance or agent that tends to produce cancer), as they actually induce more extensive DNA damage than cigarettes which contain tobacco.
So now you can see that you are not causing any less harm to you health by smoking tobacco-free cigarettes. So now you have two options. Either quit smoking completely (which is virtually impossible for an addict like you), or continue your smoking with cigarettes that contain tobacco. After all, why should you harm the tobacco industry when you are doing no less harm to your health even by avoiding tobacco while smoking?