What causes lung tumors?
oxidation reaction cancer Pollution rays or beams fossil fuels diabetes Pesticides tobacco smoke
A B C D E F G H
Lung cancer is a formation of tumors in the lung.
exposure to tobacco smoke causes tumors
What causes lung tumors? (A) oxidation reaction (B) cancer (C) Pollution (D) rays or beams (E) fossil fuels (F) diabetes (G) Pesticides (H) tobacco smoke