Tar is the name for the resinous, combusted particulate matter made by the burning of tobacco and other plant material in the act of smoking. Tar is toxic and damages the smoker's lungs over time through various biochemical and mechanical processes.

“Tar”, also known as total particulate matter, is inhaled when the smoker draws on a lighted cigarette. In its condensate form, tar is the sticky brown substance, which can stain smokers’ fingers and teeth yellow-brown. All cigarettes produce tar but the brands differ in amounts.

Tar is the sticky brown substance that stains smokers' teeth and fingers yellow-brown. It contains cancer causing particles (carcinogens). Tar damages your lungs by narrowing the small tubes (bronchioles) that absorb oxygen. It also damages the small hairs (cilia) that help protect your lungs from dirt and infection.