The most common cause is smoking, it produces the inflammation of the bronchi and the destruction of lung tissue

This produces an enlargement of the
alveoli,causing them to break

Irritation of the bronchial lining caused by smoke and air pollutants. Frequent coughing, pain and asthma

This is the inflammation os the pleura

Malignant tumors that invade and destroys
adjacents tissues

This is the contraction of the bronchi as a result of an allergic reaction.

A runny nose, itching, and sneezing due to the presence of pollen, dust etc in the air

Difficulty emitting sound due to the inflammation of the vocal chords