chewing tobacco increase blood pressure Risks of Cardiovascular and metabolic changes following

These include ammonia, arsenic, and carbon monoxide

Fee Carmichael from Planetes is a habitual smoker, but is generally unable to because oxygen is a precious commodity on space stations and space ships, so she has to do so in either a special smoking room or the little booth she constructed in the Debris Section office

Herbal Cigarettes There are some herbal cigarettes out there that are much like cigarettes without the tar and the nicotine

doi: 10.1016/S0140-6736(13)60898-3 99

flammable Something that can burn (go up in flames) easily

However, obviously, most people find it difficult to stop smoking because it is an addictive habit