Every time a person smokes, poisons such as benzene, formaldehyde, and carbon monoxide are released into the air, which means that not only is the smoker inhaling them but so is everyone around the smoker.
Studies show that passive smoking can even cause lung cancer and heart disease.
Every time a person smokes, tabacco enters the air from two sources. Those two sources are called mainstream smoke and sidestream smoke. Mainstream smoke is the smoke that the smoker pulls through the mouthpiece when he inhales or puffs. Sidestream smoke goes directly into the air from the burning tobacco. Not only is this decision going to effect her, but it will effect the others around her.