The Link Between Smoking and Asthma

- http://www.webmd.com/asthma/guide/smoking-and-asthma -

Inhaling secondhand smoke, also called “passive smoke” or “environmental tobacco smoke,” may be even more harmful than actually smoking. That’s because the smoke that burns off the end of a cigar or cigarette contains more harmful substances than the smoke inhaled by the smoker. Secondhand smoke is especially harmful to people who have asthma.