Just the Facts: Vaping SAFE Project In recent years, the number of e cigarette users worldwide has sharply increased, with many believing that vaping is less harmful than smoking traditional cigarettes. However, health experts are warning of its negative Who Invented Vaping, How Vaping Started: a History Business Insider FDA chief threatens to take e cigarettes off the market All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center