is breathing in cigarette smoke bad for you Tobacco can be your health even if are not the one smoking. the can lead to many health problems. Vaping also bad for you. E-cigarettes Smoking: Effects, Risks, Diseases, Quitting

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Old vintage tobacco / cigarette / smoking advert from early 1900's, before dawn of advertising standards

In addition to its reported association with recurrent follicular thyroid cancer and hepatocellular carcinoma 55,56 , Kigas et al

When I got back from Iraq, I felt like an eggshell, and a basket case...And I was just doing all this self-destructive behavior that I could think of to not feel anything at all," states Marine Corps veteran Roberto Pickering, who was drinking himself to death until he started using cannabis.[4] Prior to becoming a medical marijuana patient, Pickering was prescribed a total of 14 different drugs, many carrying potentially dangerous side effects