Topic: The Triangulum: Tobacco, Marijuana, and E Cigarettes. Contributions to Thirdhand Smoke and Implications for Human Exposure Electronic cigarettes: Help or hazard? Harvard Health Research & Commentary: Cities and States Consider Increasing Tobacco Age Limit to 21, Regulating ENDS Like Tobacco Products The Heartland Institute Emissions from Electronic Cigarettes: Key Parameters Affecting the Release of Harmful Chemicals Environmental Science & Technology The facts behind e cigarettes and their health risks The Washington Post