* Don't Smoke

Tobacco use is the major cause of lung cancer in the United States. About 90% of lung cancer deaths in men and almost 80% of lung cancer deaths in women in this country are due to smoking. The most important thing a person can do to prevent lung cancer is to not start smoking, or to quit if he or she currently smokes.

Quitting smoking will lower risk of lung cancer compared to not quitting. This is true no matter how old one is or how much he or she smokes. The longer a person goes without smoking, the more his or her risk will improve compared to those who continue to smoke. However, the risk in people who have quit is still higher than the risk in people who have never smoked. 

For smokers, avoiding other things that increase risk for lung cancer may help lower risk, but not as much as quitting smoking.

* Avoid Secondhand Smoke

* Make Your Home and Workplace Safer

The Environmental Protection Agency (EPA)External recommends that all homes be tested for radon. Radon detectors can be purchased or arrangements can be made for qualified testers to come into the home.

Health and safety guidelines in the workplace can help workers avoid things that can cause cancer (carcinogens).

* Eat Lots of Fruits and Vegetables

Eating a diet high in fruits and vegetables may help protect against lung cancer.