Perception and Awareness of Chronic Obstructive Pulmonary Disease, Chronic Bronchitis and Pulmonary Emphysema in the Spanish Urban Population Archivos de Bronconeumologa Severe Pulmonary Disease Associated with Electronic CigaretteProduct Use Interim Guidance MMWR Association of electronic cigarette use and risk of COPD: a systematic review and meta analysis npj Primary Care Respiratory Medicine Smoking cigarettes has long been proven to cause severe lung damage, including chronic obstructive pulmonary disease (COPD), emphysema, and lung cancer. Over time, cigarette smoke destroys lung tissue, fills airways with tar,