- Adolescent Exposure to Toxic Volatile Organic Chemicals From E-Cigarettes: Although e-cigarette vapor may be less hazardous than tobacco smoke, new findings challenge the idea that e-cigarette vapor is safe, because many of the volatile organic compounds identified are carcinogenic. http://pediatrics.aappublications.org/content/early/2018/03/01/peds.2017-3557 7 comments science