You or the smoker think it’s okay to smoke in a separate room with the door closed.

Tobacco smoke stays in the air and on the furniture, floors, and walls for a long time, even after a cigarette is put out. All those chemicals stay there, too, and they can make people sick. Even if you or the smoker smoke in one room, the toxic chemicals can spread into the rest of the house. It’s better for everyone’s health to keep the smoke outside