what causes lung cancer?
Pollution smoking salmon burning cigarettes gasoline lung tissue heating liquids respiration
A B C D E F G H
Tobacco is smoked in pipes or in cigarettes or bidis.
cigarettes cause lung cancer
what causes lung cancer? (A) Pollution (B) smoking salmon (C) burning (D) cigarettes (E) gasoline (F) lung tissue (G) heating liquids (H) respiration