Exposure to PM2.5 and E cigarette can potentially put you at greater risk of lung cancer . Both exposure to PM2.5 air pollution and e cigarette use are linked to an increased risk of Vaping, Environmental Toxicants Exposure, and Lung Cancer Risk Vaping and smoking together increases lung cancer risk fourfold E cigarettes contain hazardous substances, addictive and harmful Vaping and Lung Cancer Risks: What You Need to Know Parkway Cancer Centre Singapore