Smoking is a practice in which a substance is burned and the resulting smoke breathed in to be tasted and absorbed into the bloodstreammost commonly the substance used is the dried leaves of the tobacco plant which have been rolled into a small square of rice paper to create a small round cylinder called a cigarettesmoking is primarily practiced as a route of administration for. The fda which now regulates cigars has taken the position that cigar smoking carries many of the same health risks as cigarette smoking the agency is requiring cigar packages and ads to display six new warnings including.