How Bad Is Second-Hand Smoke?

From Live Science:

This Week’s Question: I live with my 40-year-old son and he smokes like the proverbial chimney around the house. I’m afraid of what it’s doing to his health. What can I do to get him to quit?

Tell him he may be killing you with his secondhand smoke.

Secondhand smoke—also called environmental tobacco smoke (ETS)—is made up of the “sidestream” smoke from the end of a cigarette, pipe, or cigar, and the “mainstream” smoke that is exhaled.

Read more ....