What is lung cancer most often caused by exposure to?
Chemical energy carbon dioxide asbestos sunlight water fossil fuels cigarettes hydrocarbons
A B C D E F G H
Tobacco is most commonly smoked in cigarettes.
Lung cancer is most often caused by exposure to cigarettes
What is lung cancer most often caused by exposure to? (A) Chemical energy (B) carbon dioxide (C) asbestos (D) sunlight (E) water (F) fossil fuels (G) cigarettes (H) hydrocarbons