<unk>  is contamination by tobacco smoke that lingers following the extinguishing of a cigarette, cigar, or other combustible tobacco product. First-hand smoke refers to what is inhaled into the smoker's own lungs, while second-hand smoke is a mixture of exhaled smoke and other substances leaving the smoldering end of the cigarette that enters the atmosphere and can be inhaled by others.<unk>  or "THS" is a neologism coined by a research team from the Dana–Farber/Harvard Cancer Center, where<unk> -hand" is a reference to the smoking residue on surfaces after "second-hand smoke" has cleared out.
Third-hand smoke
Tobacco smoke
Occupational noise
Air pollution
Traffic collision
Work accident
Passive smoking
Cigarette Burns