1.
Smoking is the addiction to smoked tobacco, caused
mainly by one of its most active components: nicotine.
The habitual consumption of tobacco produces illnesses
that are harmful to the health of the person who uses it.

2.
It causes respiratory and
cardiovascular diseases, different
types of cancer, and is especially
harmful during pregnancy. In
addition, it not only harms smokers,
but also those who breathe the same
air (passive smokers).

3.
According to the World Health Organization, tobacco is the leading cause of
disability and premature death in the world.
In 1988, the United States Department of Health classified nicotine as an
addictive substance.
Cigarettes and other tobacco derivatives generate dependence by a
mechanism similar to that of addiction to drugs such as cocaine and heroin.