Question

Asthma, bronchitis,
emphysema and lung
cancer are diseases of the
respiratory system.
Tobacco smoking is
directly responsible for
many lung cancer,
emphysema and
bronchitis cases as
tobacco smoke contains
many toxic and
cancerous substances.
With the help of the
Internet, find out what
these diseases are and
their effects on the body.​

Answer 1

Answer:

Why don't you find it yourself using books and internet..

Answer 2

Answer:

what is your question l can't understand....