Which is more harmful: e Cigarettes or regular cigarettes? E cigarettes: How they work, risks, and research All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center Comparison of the degree of harmful effects documented from e cigarette Download Scientific Diagram E Cigarettes: Know the Health Risks Department of Health Since their introduction in Europe in 2006 and the U.S. in 2007, the use of e cigarettes a.k.a., vapes has skyrocketed. A recent review from researchers in Australia found the results