Radon
Radon is a radioactive gas that you cannot see, smell, or taste. It forms naturally in soil and rocks. Radon damages lung cells, and people exposed to radon are at increased risk of lung cancer. Radon is the second leading cause of lung cancer, and the risk of lung cancer from radon is even higher for smokers. Radon can be present in buildings.
Because there is no way to know for sure without testing whether radon is present, the US Environmental Protection Agency (EPA) recommends that people test their homes for radon levels. If a high level is found, there are ways to lower it to make a home safer.
For information and resources on how to protect yourself from exposure to radon, read the Environmental Protection Agency’s Citizen’s Guide to Radon or contact your local Department of Health.
Asbestos and other carcinogens
People who have certain jobs (such as those who work in the construction and chemical industries) have an increased risk of lung cancer. Exposure to asbestos, arsenic, chromium, nickel, soot, tar, and other substances can cause lung cancer.
The risk is highest for those with years of exposure. The risk of lung cancer from these carcinogens is even higher for smokers. It is important to follow all of the safety guidelines provided by your employer. It is also a good idea to check with your doctor about any additional precautions you should take if you are exposed to these substances at work.
Air pollution
Outdoor air pollution, which can include, among other pollutants, diesel fumes, dust, and solvents as well as particulate matter (a mixture of very small solid particles and liquid droplets, such as sulfur dioxide, soot, and many others) may increase the risk of lung cancer. The risk from air pollution is higher for smokers.
Indoor air pollution is also a risk, specifically for those who cook and/or heat their homes with kerosene fuels, coal, and biomass (organic matter used as fuel).
Family or personal history of lung cancer
People with an immediate family member—father, mother, brother, sister, son, or daughter—who have had lung cancer may be at an increased risk for developing lung cancer. This is particularly the case when more than one family member is or has been affected by the