There is a strong correlation between smoking and lung health, with smoking being the primary risk factor for chronic respiratory diseases. It damages lung tissue and impairs the body's natural defenses against infections. Smoking can lead to diseases such as chronic obstructive pulmonary disease (COPD), lung cancer, and emphysema. Additionally, smokers may experience a decline in lung function and airflow, making it challenging to engage in physical activities. Quitting smoking can significantly improve lung health and reduce disease risk over time.