What are the affects of secondhand smoke on me?

I am thirteen years old and I have been exposed to secondhand smoke all my life. I know secondhand smoke is a lot worse than firsthand smoke and I also know that many people die of secondhand smoke. My parents will not quit smoking and I think if I have some information about my health their health and horrible things that could possibly happen to me or them that they'll quit smoking. I appreciate any information or experiences. Thank you.