New study finds e cigarettes could release 15 times more formaldehyde than tobacco Affordable vaping for smokers in poor countries branded 'a human rights issue' Human rights The Guardian E Cigarettes (Vapes) Smoking and Tobacco Use CDC World Vape Day: Why Nigeria must embrace Sweden's THR model World smoking rates decline, but e cigarette use raises fresh concerns WHO Despite Claims, Real World Evidence Shows E Cigarettes Not an Effective Smoking Cessation Aid Public Citizen