Explanation

Emphysema is a common respiratory problem among smokers.

It is a type of chronic obstructive pulmonary disease (COPD) that causes shortness of breath and makes it difficult to breathe.

Emphysema damages the air sacs in the lungs, which can lead to:

1. Shortness of breath
2. Wheezing
3. Coughing
4. Chest tightness

Smoking is the leading cause of emphysema, as it damages the lung tissue and leads to inflammation.