Smoking vs Vaping Which is Worse? Smoking: 1. 7,000+ harmful chemicals 2. Causes lung cancer, COPD, heart blockages, strokes 3. Long term, progressive, and deadly Vaping: 1. Marketed as "safer" but misleading Chronic electronic cigarette exposure in mice induces features of COPD in a nicotine dependent manner Thorax Vaping and COPD: Is it okay or can it cause more problems? The role of cigarette smoke induced pulmonary vascular endothelial cell apoptosis in COPD Respiratory Research Springer Nature Link