E cigarette vapour contains two cancer causing chemicals, study says Vaping Leads To Lung Disease Cancer Lungs Mascot Holding Ecigarette Or Vape Device Internal Organ Need Medical Help Lungs Disease From Smoking And Vaping Stock Illustration Download Image Now iStock The combination of propylene glycol and vegetable glycerin e cigarette aerosols induces airway inflammation and mucus hyperconcentration Scientific Reports E Cigarettes Promote Macrophage Tumor Cells Crosstalk: Focus on Breast Carcinoma Progression and Lung Metastasis The Dangers of Vaping and Propylene Glycol AJEM