You have never smoked a cigarette, avoid smoking areas, and ask guests to smoke outside. Yet someone lights a cigarette at the next table, on a nearby balcony, or inside a shared space. Within minutes, you may be breathing in chemicals you never chose to inhale. This is called second-hand smoke, and it can affect your health even if you have never touched tobacco. The unsettling truth is that you cannot always see how much smoke you are breathing, but repeated exposure can increase your risk of serious diseases, including heart disease and lung cancer.
