With 4,000 chemical compounds and 69 known cancer-causing agents, secondhand smoke is the third leading cause of preventable death in America. "Preventable" because no one has to be exposed to secondhand smoke at all. Whether it's the fumes released from the burning end of someone's cigarette or the chemical-heavy haze smokers exhale, breathing in secondhand smoke puts you at risk.

"You know, when you go into some place that's smoky and you come out and you smell your hair and you smell your clothes and it smells like smoke? Just think about how much more absorbent your lungs are than your clothes. It's very frightening what secondhand smoke can do to your body." —Eliz Greene, Milwaukee

Help protect yourself and others from the dangers of secondhand smoke. Learn more about the unhealthy effects of secondhand smoke in your own life and find out what you can do about it: