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