Question

One of my friend is addicted to smoking how can i convience him to stop smoking

Answer 1

tell him that it is harmful and very dangerous for us it can cause many diseases like cancer, cough etc. and if a person smokes a lot it causes it's untimely death. substances like cigarette consists many harmful chemicals which damages our lungs.
there are many products available in market which help your friend to leave smoking.
If your friend loves his life, his family for them he should stop smoking.