Vaping cannabis found to expose lung cells to toxic and cancer linked substances Many students believe that vaping harmless, which is far from the truth. Vape pens can contain potentially harmful substances such as chemicals linked to lung disease, cancer causing chemicals, heavy metals such as VAPING IS NOT SAFE AND THE CANCER WARNING IS NOW MUCH STRONGER For years, vaping was sold as the safer option. But safer than cigarettes does not mean safe. A major Vaping is likely to cause cancer, NZ researchers find Stuff.co.nz Australia Adds Vape Graphic Warnings Tobacco Reporter Vaping Cancer Council SA