COPD What Smoking is Really Doing to Your Lungs ABILITY Magazine Overview of the effect of cigarette smoke on the development and Download Scientific Diagram National Emphysema Foundation E cigarettes and Vaping Just As Bad On Lung Health As Cigarettes COPD is a progressive, largely irreversible airflow limitation characterized by chronic cough, sputum production, and dyspneamost commonly due to smoking. Spirometry (FEV FVC < 0.7) confirms diagnosis; smoking cessation is the most effective