New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking Smoking Causes Cancer. But How? Genetics Generation Tobacco smoking rates are decreasing in people with major depression and substance use disorder Adolescents and E cigarette Use: Long term Effects, Behaviors and Lung Injury Effect of an electronic nicotine delivery device (e Cigarette) on smoking reduction and cessation: a prospective 6 month pilot study BMC Public Health Springer Nature Link