Radon is an invisible, odorless gas that occurs naturally in the soil. Because radon may be present in some homes, it is a good idea to have a radon test performed on a home before purchasing it. Radon test kits are available at many hardware stores. Once a radon problem has been corrected in the home, the hazard from radon is gone. Radon exposure can also occur in the workplace, especially to those individuals who work in mines.
Asbestos are fibers that occur naturally and are used in some industrial substances like insulation.
The fibers from asbestos products tend to break down, and when inhaled, they can get stuck in the lungs. These fibers can damage lung tissue and over time increase the risk that a person will develop lung cancer and other lung diseases. Researchers continue to explore the links between lung cancer and exposure to certain types of air pollutants. A person who has already been treated for lung cancer is more likely to develop a second lung tumor compared with someone who has never had lung cancer. The most important factor in preventing lung cancer is to quit, or better yet, never start smoking.