obviously putting hot smoke into your lungs is not the best thing for them...

but just be resposible with it.....

it effects everyone differently so it's up to you to find out how much you are comfortable with smoking....just dont let it get in the way with important things you have to do.

some people smoke everyday day of their lives and dont get ill from it.....some people get ill from smoking passivly....
If you are really that worried about health issues with smoking, dont smoke....