we need to limit smoking somehow

Hello I am an eleven year old girl. My parents smoke and so does my brother. They are always smoking so, my house smells like cigarette all the time. I heard that there are chances of me getting cancer eventhough I do not smoke. Second hand smoke was it? I do not want to die eventhough I do not smoke. I wish that my family quits smoking becasue I want them to care about me about the dangers of second hand smoke.