What are harmful products in cigarettes?

Ammonia: Household cleaner.
Arsenic: Used in rat poisons.
Benzene: Used in making dyes, synthetic rubber.
Butane: Gas; used in lighter fluid.
Carbon monoxide: Poisonous gas.
Cadmium: Used in batteries.
Cyanide: Lethal poison.
DDT: A banned insecticide.
Ethyl Furoate: Causes liver damage in animals.
Lead: Poisonous in high doses.
Formaldehyde: Used to preserve dead specimens.
Methoprene: Insecticide.
Maltitol: Sweetener for diabetics.
Napthalene: Ingredient in mothballs.
Methyl isocyanate: Its accidental release killed 2000 people in Bhopal, India, in 1984.
Polonium: Cancer-causing radioactive element.