A highly toxic nerve poison that constricts arteries and causes high blood pressure. One of the poisonous substances known to man. 

2. Hydrogen Cyanide

Used in America in the gas chamber.

3. Carbon Monoxide

Can be found in exhaust gases, causes death if inhaled for a relatively short time.

4. Tar

A nasty sticky substance known to be associated with lung cancer; this coats your lungs.  

5. Time

Because you want to live to see old age.

Cigarette Graphic supplied by Rob Godfrey