What has a negative impact on the lungs?
unpolluted air healthy atmosphere mold spore smoking disease influenza clean air A virus
A B C D E F G H
Major components of the respiratory system are the lungs, trachea, nose, and the cell.
A mold spore has a negative impact on the lungs
What has a negative impact on the lungs? (A) unpolluted air (B) healthy atmosphere (C) mold spore (D) smoking (E) disease (F) influenza (G) clean air (H) A virus