For many smokers, the act of smoking cigarettes comes with a nagging a sense guilt, especially around non-smokers, children, or perhaps shared apartments. The well-documented dangers of secondhand smoke are undeniable, associated with respiratory infections, asthma, and much more serious long-term health problems in people who inhale it. https://graph.org/Clearing-the-Air-Can-Personal-Air-Filters-Protect-Others-from-Secondhand-Smoke-11-04-2