3000 people die of lung cancer each year due to secondhand smoke, according to the Centers for Disease Control.
Secondhand smoke can also cause asthma, pneumonia, and bronchitis in children.
Many restaurants, malls, and workplaces have banned smoking altogether. If your favorite spot has not yet done so, ask the owner. If you are a smoker, don't smoke inside a car if there are other passengers, even if you have rolled down the windows. The American Lung Association offers detailed information about quitting on its web site. You can also ask your doctor.