For example, indoor radon exposure was estimated to cause between 3-14 % of all lungcancers in 2004, the second most important cause of lung cancer in many countries.
Tobacco use remains the leading cause of preventable death in the United States, according to the Centers for Disease Control, and is to blame for about 85% of lungcancers.
Passive smoking has been associated with lymph gland, nasal, and lungcancers, allergies, eye and skin diseases, as well as respiratory problems in cats and dogs.