Smoking

Practice of inhaling a burnt substance for psychoactive effects

Smoking is the combustion of a substance, usually plant material, and the inhalation of resulting fumes. Today, smoking is mostly practiced by rolling the dried leaves of the tobacco plant into a cigarette. Other forms of tobacco smoking include the use of a smoking tobacco with a pipe or cigar, or using a bong.

From Wikipedia, under CC BY-SA. More on occurri.