Smoking of tobacca adds:

Smoking may cause

(a) What is Active and Passive Smoking? (b) What are the effects of smoking on respiratory system ?

Smoking is not related to

In a survey concerning the smoking habits of consumers it was found that 50% smoke cigarette A, 45% smoke B, 40% smoke C, 25% smoke A and B, 10% smoke B and C, 16% smoke C and A, 8% smoke all the three brands. What percentage do not smoke ?

Smoking is used as a technique of

Why is smoking bad for the kidneys?

Smoking leads to the hypersecretion of: