Smoking cigarettes is unhealthy and dangerous both for your health as well as the environment. Various types of toxic air pollutants and heinous chemicals reside in cigarette smoke. Therefore, while you are smoking, these materials get released in the air and pollute it heavily. The same happens to your home too. If you tend to smoke frequently in your room, then its air would get filled up with these toxins.
So, to avoid the occurrences of serious diseases, you would have to put a stop to your smoking habit first. If you cannot restrict yourself from smoking, then make sure to do it outside. Do not smoke inside your house as it is harmful to you as well as your family.