I’ve written several posts about e-cigarettes — i.e., vaping. I consider them the most effective response to the enormous public health problem posed by cigarette smoking — the leading cause of preventable death in this country. Vaping offers a relatively healthy alternative for smokers who want to be done with cigarettes (as a great many smokers desire, but haven’t been able to accomplish). They deliver the nicotine that attracts people to cigarettes (and addicts them), but not the tar and other carcinogens that kill them.