Vaping Exposes Users to More Toxic Metals Than Smoking Cigarettes inChemistry Smoking and vaping are often compared, but neither is harmless. While they work differently, both can expose the lungs to addictive nicotine and harmful chemicals that impact breathing and overall health. Smoking E Cig Vapor vs. Tobacco Smoke: Which Is More Harmful? White Cloud White Cloud Electronic Cigarettes E cigarettes: A win or loss for public health? Knowable Magazine E Cigarettes and Vaping OHSU