Parents' second hand marijuana smoke may cause colds in children New Scientist Passive vaping time we see it like secondhand smoke and stand up for the right to clean air Another Gross Reason to Put Down the E Cigarettes American Lung Association Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Vaping Could Make You 40 Percent More Likely to Get Respiratory Disease The Brink Boston University