How People who Smoke or Vape Cannabis Transport the Chemical Residue into Clean Spaces Thirdhand Smoke Resource Center Smoking vs. Vaping Weed: Know the Facts Hackensack Meridian Health Are Weed Pens Bad for You? What You Need to Know Before You Start Vaping Don't Use Bootleg or Street Vaping Products, C.D.C. Warns The New York Times Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA