Homework Help: Health: Substance Abuse: Contents of a Cigarette

Nicotine - is a powerful poison that causes people to become addicted.

Carbon monoxide - is an invisible and poisonous gas that reduces the amount of oxygen in the blood.

Tar - tar is brown and sticky and is known to cause cancer. It coats the lungs and damages the air sacs hence reducing a persons breathing capacity.

Homework Help: Health: Substance Abuse

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