Vaporizing tobacco: is vaping worse than smoking, differences, quitting smoking The Health Effects of Vaping Indoors Indoor Doctor Do Vapes Set off Smoke Alarms? How to Avoid It Vapes are harmful and can be highly addictive. Some disposable vapes have nearly tripled in nicotine strength in the span of only 5 years. 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