Sidestream smoke
Smoke directly released into the air from a burning cigarette, cigar, or smoking pipe / From Wikipedia, the free encyclopedia
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Sidestream smoke is smoke which goes into the air directly from a burning cigarette, cigar, or smoking pipe.[1] Sidestream smoke is the main component (around 85%) of second-hand smoke (SHS), also known as Environmental Tobacco Smoke (ETS) or passive smoking.[2] The relative quantity of chemical constituents of sidestream smoke are different from those of directly inhaled ("mainstream") smoke, although their chemical composition is similar.[3] Sidestream smoke has been classified as a Class A carcinogen by the U.S. Environmental Protection Agency.