Question

Demonstration of the presence of tar in cigarette smoke and also showing by charts and pictures the difference of lungs of smokers and non smokers

Answer 1

Cigarette smoke contains numerous carcinogens (substances that may cause cancer), poisonous gases (carbon monoxide and hydrogen cyanide) and other chemicals. One of these chemicals is called tar (brown sticky substance) that collects in smoker's lungs from where it passes into blood. It also kills the cells-of wind pipe and lungs. Cigarette smoke also contains a strong addictive drug called nicotine.