Radon, the colorless and odorless gas that emanates from the earth, kills more people annually than any other cause of lung cancer except smoking.
Secondhand Smoke
Secondhand smoke, which you do not actively use, can make you to be at a 30% risk of contracting lung cancer.
Air Pollution
Ambient air pollution that consists of toxic gases and or particles have been shown to contribute significantly to lung cancer especially in cities.
Asbestos Exposure
The disease resulting from inhaling of fine particles of asbestos in older buildings leads to lung cancer.
Genetic Factors
The relatives who never smoked also can raise your risk if a close relative got lung cancer before the age of 45.
Underlying Lung Diseases
Other diseases such as chronic obstructive pulmonary disease or chronic lung infections can also cause lung cancer.
Occupational Exposures
Some jobs involve handling dangerous substances with higher risks of lung cancer such as chromium, arsenic, and silica.
Cooking Fumes
Working in confined kitchens with a consequent exposure to cooking fumes emanating from wood or fried food, increases lung cancer incidence in non-smoking women.