Chronic obstructive lung disease (COPD) is a reversible lung disease which is a principal cause of morbidity and mortality worldwide. It is the third leading cause of death worldwide according to the reports of American Thoracic Society (ATS) and European- Respiratory Society. According to World Health Organization (WHO), every year death and in 2030 it will become the third most common cause of death. COPD risk factors includes smoking tobacco, exposure to dusts, hereditary predisposition, and fumes, indoor and outdoor air pollutants, ageing, and asthma. Out of all these risk factors, the main reason that develops COPD fastest is smoking which is further linked with depression
